阅读说明：本技术 义齿、基准义齿以及义齿的制造方法 (Denture, reference denture, and method for manufacturing denture ) 是由 丰田真奈 疟师步 山崎达矢 于 2020-03-04 设计创作，主要内容包括：本发明提供一种义齿,在作为构成部件包含由基准义齿构成的材料部件的义齿中,能够在不会降低个别患者的适合性的前提下,进一步提高预先检查以及利用磨削进行的调整在内的总的效率性的情况下进行制造；义齿(1)在义齿基托(2)上固定有人造牙齿(31),义齿基托(2)具有基准义齿基托部件(4)和与其接合的由硬化性义齿基托用材料的硬化体构成的调整部件(6),义齿基托(2)具备具有覆盖患者口腔内的牙槽嵴顶部区域粘膜的粘膜面的中央区域(2A1)、以及作为其前后区域的前方区域(2A1)和后方区域(2A3),调整部件(6)具有分别构成这些义齿基托(2)各区域粘膜面的至少一部分的中央调整部件(6A1)、前方调整部件(6A2)以及后方调整部件(6A3),进一步地,前方区域和后方区域中的基托边缘侧前端区域的至少一部分,分别由前方调整部件(6A2)和后方调整部件(6A3)构成。(The invention provides a denture, which is manufactured under the condition of further improving the total efficiency including the preliminary inspection and the adjustment by grinding on the premise of not reducing the suitability of individual patients in the denture comprising a material component composed of a standard denture as a component; in a denture (1) in which an artificial tooth (31) is fixed to a denture base (2), the denture base (2) has a reference denture base member (4) and an adjustment member (6) joined thereto and composed of a hardened material for a curable denture base, the denture base (2) has a central region (2A1) having a mucosal surface covering the mucosa of the apical region of the alveolar ridge in the oral cavity of a patient, and a front region (2A1) and a rear region (2A3) which are front and rear regions thereof, the adjustment member (6) has a central adjustment member (6A1) which constitutes at least a part of the mucosal surface of each region of the denture base (2), the front adjusting member (6A2) and the rear adjusting member (6A3) are configured such that at least a part of the base edge side front end region in the front region and the rear region is constituted by the front adjusting member (6A2) and the rear adjusting member (6A3), respectively.)

1. A denture is provided, which is a denture with artificial teeth fixed on a denture base,

the denture is characterized in that,

the denture base has a reference denture base member to which the artificial tooth is fixed and an adjustment member made of a hardened body of a denture base material, the adjustment member being joined to the reference denture base member;

in a state where the denture is worn in the oral cavity of the patient,

when the labial direction of the denture is set as the front, the throat side direction is set as the back, and the side opposite to the alveolar ridge mucosa in the oral cavity of the patient is set as the mucosa side,

when the denture base and the reference denture base member are such that the surface on the side of the mucosal membrane is a mucosal surface, the surface on the opposite side thereof is a polishing surface, and the boundary between the mucosal surface and the polishing surface is a base edge,

the denture base comprises:

a central region having a mucosal surface covering a mucosa of an apical region of an alveolar ridge within an oral cavity of a patient,

an anterior region having a mucosal surface covering a patient's oral mucosa more anterior than a top region of the alveolar ridge, an

A posterior region having an mucosal surface covering a patient's oral mucosa further posterior than the alveolar ridge top region;

the reference denture base member has a base central region, a base front region and a base rear region;

the adjustment member has:

a central adjustment member that is joined to the mucosal surface in the central region of the susceptor and that forms the central region together with the central region of the susceptor,

a front adjustment member which is joined to the adhesive surface of the front region of the base and constitutes the front region together with the front region of the base, and

a rear adjustment member that is joined to the mucosal surface in the rear region of the base and that forms the rear region together with the rear region of the base;

at least a part of the base edge side front end region in the front region and the rear region is constituted by the front adjustment member and the rear adjustment member, respectively.

2. The denture according to claim 1,

a base edge side front end region of 80% or more of the base edge in the front region is constituted by the front adjustment member,

the rear region is formed by the rear adjustment member, and a base edge side front end region of 80% or more of the base edge is formed by the rear adjustment member.

3. The denture according to claim 2,

the shape of the adjustment member is adjusted in accordance with the shape of the patient's mouth,

by adjusting the shape, the adjusting member forms an occlusal surface which is a curved surface: in a state where the above-described denture is worn in the oral cavity of an individual patient as a wearer, the teeth of the upper jaw and the lower jaw are curved surfaces which are in close contact with each other and can be approximated to a plane, and the teeth of the upper jaw and the lower jaw are: artificial teeth fixed to the denture, and natural teeth of the patient when the patient has the natural teeth.

4. The denture according to any one of claims 1 to 3,

when at least one of the artificial teeth is taken as an essential artificial tooth, the essential artificial tooth is selected from the group consisting of a first small molar tooth, a second small molar tooth, a first large molar tooth, and a canine tooth, and,

in the case where the boundary portion with the artificial tooth in the front grinding surface of the denture base is defined as a tooth neck portion, the portion extending from the tooth neck portion to the base edge in the form of a wing is defined as a flange, and the portion on the front side of the flange, where the tooth neck portion of the necessary artificial tooth is defined as a base end and the base edge on the extension thereof is defined as a tip end, is defined as a front flange portion of the necessary artificial tooth,

the front adjustment member is provided at a base edge portion of a front flange portion of the artificial tooth of at least one of the one or more artificial teeth, and 5% to 65% of a ground surface of the front flange portion of the artificial tooth is provided at the front adjustment member.

5. The denture according to claim 4,

the false tooth is a false tooth for the upper jaw,

the necessary artificial teeth include artificial teeth of canine teeth, i.e., artificial canine teeth, and,

the denture base is an upper jaw denture base having a palatal base as the posterior region, wherein the palatal base covers a palatal mucosa of the upper jaw of the patient that is posterior to the alveolar ridge top region,

the palate base part is provided with a palate base adjusting part composed of the rear adjusting part,

at least a part of a base edge of the front flange part of the essential artificial teeth of the artificial dog teeth is constituted by the front adjustment member, and 10% or more and 65% or less of a polished surface of the front flange part of the essential artificial teeth is constituted by an exposed surface of the front adjustment member.

6. The denture according to claim 4,

the false tooth is a false tooth for the lower jaw,

the necessary artificial teeth include artificial teeth of canine teeth, i.e., artificial canine teeth, and,

the denture base is a denture base for a lower jaw having a lingual flange part as the posterior region, wherein the lingual flange part covers lingual alveolar ridge mucosa of the lower jaw of the patient that is posterior to an alveolar ridge top region,

the rear flange part has a tongue-side flange adjusting part constituted by the rear adjusting member,

at least a part of a base edge of the essential front flange portion of the artificial dog teeth is constituted by the front adjustment member, and 5% or more and 60% or less of a ground surface of the essential artificial tooth front flange portion is constituted by an exposed surface of the front adjustment member.

7. A reference denture, which is characterized in that,

the denture base is used as a reference denture component provided with the reference denture base member and the artificial tooth in the denture according to any one of claims 2 to 6.

8. The reference denture according to claim 7,

when at least one of the artificial teeth is taken as an essential artificial tooth, the essential artificial tooth is selected from the group consisting of a first small molar tooth, a second small molar tooth, a first large molar tooth, and a canine tooth, and,

the necessary artificial teeth include artificial teeth of canine teeth, i.e., artificial canine teeth, and,

when the reference denture is arranged on a plane assumed to be an occlusal plane with the artificial tooth side facing downward, in a vertical cross section cut along a plane defined by a width of the anterior region of the base denture base which is 0.5 mm to 3 mm below a distal end of the anterior region of the base denture base on the base edge side by 2 mm, the plane is: a plane perpendicular to the plane and passing through the apex of the artificial canine tooth, in a normal direction with respect to the abrasive surface of the base front region.

9. The reference denture according to claim 8,

the reference denture is a reference denture for the upper jaw,

in the longitudinal section, a height difference between a base-holder edge-side front end of the base-holder forward region and the cusp of the artificial dog tooth is 13 mm or more and 20 mm or less.

10. The reference denture according to claim 8 or 9,

the reference denture is a reference denture for the upper jaw,

the minimum thickness of the base palate support part is more than 0.5 mm and less than 3 mm.

11. The reference denture according to claim 8,

the reference denture is a reference denture for the lower jaw,

in the longitudinal section, a height difference between a base-holder edge-side front end of the base-holder forward region and the cusp of the artificial dog tooth is 13 mm or more and 18 mm or less.

12. A manufacturing method of false teeth is characterized in that,

the method comprises the following steps:

(A) a reference denture preparation step of preparing a reference denture to be a reference denture component having a reference denture base member and an artificial tooth,

(B) a reference denture determining step of determining a shape of a reference denture to be used by (1) inserting the reference denture into an oral cavity of a patient to confirm a contact state between an oral mucosa of the patient and the reference denture, or (2) inserting the reference denture into an articulator to which an oral cavity internal model of the patient is attached, by placing the reference denture at an appropriate position on a virtual occlusion plane assumed to be a bite plane placed at a position to be medically present in the oral cavity of the patient, and confirming the contact state between the oral cavity internal model of the patient and the reference denture, and when there is an improper contact in use, selecting a reference denture having another shape that does not cause the improper contact, or finely adjusting a shape of a base part of the reference denture so that the contact does not occur,

(C) a stacking or transferring step of stacking a material for a denture base in an uncured state for forming the adjustment member on an adhesive surface of the reference denture base member in the reference denture to be used in the reference denture determining step, then placing the reference denture having the material for a denture base stacked thereon at an appropriate position on the virtual occlusal plane in the patient's oral cavity or the articulator, transferring a shape of the patient's oral cavity mucosa or the patient's oral cavity model to the material for a denture base, and performing edge formation to remove the remaining material for a denture base, and a method of manufacturing the same

(D) A curing step of curing the curable denture base material after the stacking or transferring step;

the (C) stacking or replicating process comprising:

(C1) a center deposition or transfer step of depositing an uncured material for a denture base on a base center region of the reference denture base member to transfer the shape of the model in the patient's oral cavity or the patient's oral cavity,

(C2) a front deposition or transfer step of depositing an uncured material for a denture base on the base front region of the reference denture base member, transferring the shape of the model in the patient's oral cavity or the patient's oral cavity, and extending the model from the base edge to form an edge, and

(C3) a posterior deposition or transfer step of depositing an uncured material for a denture base on the posterior region of the base of the standard denture base member, transferring the shape of the model in the patient's oral cavity or the patient's oral cavity, and extending the model from the base edge to form an edge;

after the center deposition or transfer step, the front deposition or transfer step and the rear deposition or transfer step may be performed simultaneously or individually.

13. The method for manufacturing a denture according to claim 12,

in the reference denture preparation step, the reference denture of claim 7 is prepared, and the denture of claim 1 is manufactured.

14. The method for manufacturing a denture according to claim 12 or 13,

after the front deposition or transfer step and the rear deposition or transfer step, a rinsing step is further included in which the material for the hardened denture base in an uncured state is added to the mucosal surface side surface of the reference denture base, and the shape of the mucosal surface side surface is corrected.

Technical Field

The present invention relates to a denture, a reference denture, and a method for manufacturing a denture.

Background

With rapid aging in recent years, demands for dentures have been increasing. Generally, dentures are manufactured while being finely adjusted one by using a manual work according to the shape of the mouth of a patient.

As a technique for manufacturing a denture by reducing the labor of the manual work, a technique using a standard denture is known (see patent documents 1 to 3). Regarding such a technique, patent document 1 discloses: a denture manufacturing kit comprising a combination of a reference denture base which has been adjusted in advance, a polymerizable resin composition which is added to the surface of the denture base which is in contact with the oral surface, an artificial tooth having a recess in the tooth crest (occlusal surface) into which the polymerizable resin composition is to be filled, and a polymerizable resin composition which is filled into the recess of the artificial tooth. In addition, in the example of patent document 1, there are disclosed: an artificial tooth having a recess for supplementing a polymerizable resin on the occlusal surface side was manufactured by cylindrically cutting out 1 mm to 3 mm from the occlusal surface of a commercially available artificial tooth with a drill. A wax model denture was manufactured by a general method using an edentulous full jaw model for teaching practice, a portion in contact with a mucous membrane was cut off, a part from which an artificial tooth was extracted was extruded by using a mold molded from an original mold of a reference denture base (75:25) to manufacture a gum portion of the denture base, artificial teeth commercially available on the market were arranged on a gate tooth portion and an upper jaw molar portion thereof, and artificial teeth having a concave portion of the present invention were arranged on a lower jaw molar portion, thereby forming a reference denture base. As a palate member, a palate-shaped mold was prepared in which a heat-softened object of the copolymer sheet having a thickness of 0.5 mm was pressed against the palate-shaped mold to define the shape.

Patent document 2 discloses: a reference denture base having a specific plane shape determined on the basis of the oral cavity shapes of a person with an dentures and a person without dentures. Specifically, patent document 2 discloses a reference denture base having the following shape: the length of a line segment connecting a first reference point corresponding to the left costal maxillary incisal track and the left molar posterior pad and a second reference point corresponding to the right costal maxillary incisal track and the right molar posterior pad at the rear edge of the base is set as a reference length, and the lengths from a plurality of points determined at predetermined positions on two reference line segments respectively connecting a third reference point corresponding to the upper (lower) labial ligament in the middle of the labial base edge and the first reference point and the second reference point to the base edge are respectively formed in a predetermined range with respect to the ratio of the reference length. Further, patent document 2 discloses: after the artificial teeth are arranged on the reference denture base to form a reference denture, a spacer material is stacked on the reference denture base, and then the artificial teeth are tried to be worn in the oral cavity of an individual patient, and the occlusion adjustment is performed, so that a denture which is suitable for the oral cavity shape of the individual patient is obtained.

Further, patent document 3 discloses a jig for aligning a reference denture. The jig is a member for placing a reference denture in an appropriate position in the oral cavity of a patient, and has a reference denture holding portion for holding the reference denture, and the reference denture is aligned by guiding the reference denture into the oral cavity or into an articulator to which upper and lower edentulous jaw models are fixed, while the reference denture is held by the reference denture holding portion. Further, patent document 3 discloses a denture production method having the following features: a pad material is deposited on the inner surface side of a reference denture, and then the shape is recorded on the pad material deposited on the reference denture.

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese patent, Japanese patent No. 3449733

Patent document 2: japanese patent, Japanese patent No. 6294706

Patent document 3: international publication No. WO2018/207867

Disclosure of Invention

(problems to be solved by the invention)

As described above, patent documents 1 and 2 disclose: the present invention is based on a technique of realizing a concept of fitting a base denture base composed of a complete denture base of an all-denture type by depositing a spacer material on a mucosal surface (basal surface) of the base denture base and pressing the base denture base against the oral mucosa of a patient. Patent document 2 discloses advantages of using a reference denture (base), specifically as follows: since the denture can be easily fitted to the shape of the oral cavity of the patient simply by stacking the spacer material on the reference denture (base), the denture manufacturing time can be shortened. Further, according to patent document 2, by forming the reference denture (base) into the above-described specific planar shape, the fitting rate for a large number of patients can be made high, for example, 90%, and by merely selecting the reference denture (base) that fits the size of the patient's mouth, the advantages of using the reference denture (base) as described above can be obtained in most cases.

However, as described below, it cannot be said that a method for efficiently manufacturing a denture suitable for an individual patient using a reference denture base or a reference denture has been established. That is, the reference denture base disclosed in patent document 1 is manufactured using only the edentulous maxillofacial model for teaching practice, and its specific shape is not disclosed. Patent document 1 does not describe the detailed steps of the denture manufacturing method using the above-described reference denture base.

Further, patent document 2 merely describes that a reference denture base or a reference denture suitable for the size of the oral cavity of a patient is selected as a manufacturing step before a spacer material is deposited on the reference denture base or the reference denture, and details thereof are not clear. The reference denture (or reference denture base) means: a material member used for manufacturing a denture (or a denture base) is a finished denture (denture base) member having a predetermined shape that is slightly smaller (thin or small in area) than a denture (or a denture base) to be manufactured. In such a reference denture (or reference denture base), several sizes (e.g., S size, M size, L size, etc.) can be prepared to fit the oral cavity size of a standard patient, but the number of sizes is not so large. Therefore, even when it is judged that the fitting is usable in size, it is necessary to try on the fitting and confirm the fitting.

Specifically, the following simple preliminary check is usually performed: an upper jaw reference denture (an upper jaw reference denture) and/or a lower jaw reference denture (a lower jaw reference denture) are inserted into the oral cavity of a patient so as to maintain an appropriate occlusal state, and it is confirmed whether or not there is a portion which is in improper contact with mucous membranes or the like (contact method, hereinafter also referred to as improper contact) and causes pain when worn for a long period. Then, in the preliminary inspection stage, it is sometimes determined that adjustment by grinding is necessary, and in this case, it is necessary to perform the adjustment in advance by grinding with a portable grinder or the like. Such preliminary adjustment requires not only equipment such as a portable grinding machine, but also measures against dust generated when the grinding amount is large, and further, the time required for producing the denture greatly increases depending on the degree of grinding technique of the operator, but such preliminary inspection and adjustment by grinding are not particularly considered in patent document 2.

The present invention has been made in view of the above circumstances, and an object thereof is to achieve at least one of the first to third objects described below.

A first object is to provide a denture which can efficiently manufacture a denture suitable for an individual patient and includes a material component made of a reference denture as a constituent component, the denture comprising: the denture can be manufactured with further improved overall efficiency including preliminary inspection and adjustment by grinding without reducing the suitability for individual patients.

In addition, a second object is to provide, as a reference denture that can be used as a denture material component, a denture comprising: a reference denture capable of remarkably reducing the occurrence rate of a situation requiring adjustment by grinding by preliminary inspection.

In addition, a third object is to provide: a denture manufacturing method capable of efficiently manufacturing a denture that achieves the first object.

(means for solving the problems)

The present invention solves the above problems, and according to a first aspect of the present invention, provides a denture having the following features.

A denture according to the present invention is a denture having an artificial tooth fixed to a denture base, wherein the denture base includes a reference denture base member to which the artificial tooth is fixed and an adjustment member made of a hardened material for a hardened denture base, and the adjustment member is joined to the reference denture base member; when the denture is worn in the oral cavity of a patient, the denture base has, as a base edge, a surface of the denture base and the standard denture base member on the side of the mucous membrane as a mucous membrane surface, a surface on the opposite side thereof as a polishing surface, and a boundary between the mucous membrane surface and the polishing surface, wherein the direction of the labial side of the denture base is defined as the front, the direction of the throat side is defined as the back, and the side facing the alveolar ridge mucous membrane in the oral cavity of the patient is defined as the mucous membrane side: a central region having an mucosal surface covering a mucosal membrane of an apical region of an alveolar ridge in an oral cavity of a patient, a forward region having an mucosal surface covering a mucosal membrane of an oral cavity of a patient more forward than the apical region of the alveolar ridge, and a rearward region having an mucosal surface covering a mucosal membrane of an oral cavity of a patient more rearward than the apical region of the alveolar ridge; the reference denture base member has a base center region, a base front region and a base rear region; the adjusting member includes: a central adjusting member joined to the adhesive surface of the center region of the susceptor and constituting the center region together with the center region of the susceptor, a front adjusting member joined to the adhesive surface of the front region of the susceptor and constituting the front region together with the front region of the susceptor, and a rear adjusting member joined to the adhesive surface of the rear region of the susceptor and constituting the rear region together with the rear region of the susceptor; at least a part of the base edge side front end region in the front region and the rear region is constituted by the front adjusting member and the rear adjusting member, respectively.

In the denture of the present invention, it is preferable that: the front region is configured such that a base edge side front end region of 80% or more of the base edge is formed by the front adjusting member, and the rear region is configured such that a base edge side front end region of 80% or more of the base edge is formed by the rear adjusting member.

In the denture of the present invention, it is preferable that: the shape of the adjustment member is adjusted according to the shape of the oral cavity of the patient, and by adjusting the shape, the adjustment member forms an occlusal surface which is a curved surface: in a state where the above-described denture is worn in the oral cavity of an individual patient as a wearer, the teeth of the upper jaw and the lower jaw are curved surfaces which are in close contact with each other and can be approximated to a plane, and the teeth of the upper jaw and the lower jaw are: artificial teeth fixed to the denture, and natural teeth of the patient when the patient has the natural teeth.

In the denture of the present invention, it is preferable that: when at least one of the artificial teeth is selected from the group consisting of a first small molar tooth, a second small molar tooth, a first large molar tooth and a canine tooth, and when a boundary portion with the artificial tooth in the front grinding surface of the denture base is a tooth neck portion, a portion extending from the tooth neck portion to a base edge in an airfoil shape is a flange, a portion in front of the flange, which is a base end of the tooth neck portion of the necessary artificial tooth and a tip end of a base edge on an extension line thereof, is a necessary artificial tooth front flange portion, a base edge portion of the necessary artificial tooth front flange portion in at least one of the necessary artificial teeth is composed of the front adjustment member, and 5% or more and 65% or less of the grinding surface of the necessary artificial tooth front flange portion is included, the front adjustment member is provided.

In the denture of the present invention, it is preferable that: the denture is an upper jaw denture, the necessary artificial teeth include artificial dog teeth that are canine teeth, the denture base is an upper jaw denture base having a palatal base part as the posterior region, the palatal base part covers a palatal mucosa of a patient's upper jaw that is posterior to an alveolar ridge top region, the palatal base part has a palatal base adjustment part that is composed of the posterior adjustment member, at least a part of a base edge of the front flange part of the necessary artificial teeth of the artificial dog is composed of the anterior adjustment member, and 10% to 65% of a polishing surface of the front flange part of the necessary artificial teeth is composed of an exposed surface of the anterior adjustment member.

In the denture of the present invention, it is preferable that: the denture is a mandibular denture, the necessary artificial teeth include artificial canine teeth, and the denture base is a mandibular denture base having a lingual flange as the posterior region, wherein the lingual flange covers a lingual alveolar ridge mucosa at a posterior side of an alveolar ridge top region in a mandible of a patient, the posterior flange has a lingual flange adjusting portion formed by the posterior adjusting member, at least a portion of a base edge of the necessary anterior flange of the artificial canine is formed by the anterior adjusting member, and 5% to 60% of a polished surface of the necessary artificial tooth anterior flange is formed by an exposed surface of the anterior adjusting member.

In addition, according to a second aspect of the present invention, there is provided a reference denture having the following features. The reference denture is used as a reference denture component including the reference denture base member and the artificial tooth in the denture of the present invention.

In the above-described reference denture of the present invention, it is preferable that: when at least one of the artificial teeth is a necessary artificial tooth selected from the group consisting of a first molar tooth, a second molar tooth, a first molar tooth, and a canine tooth, and the necessary artificial tooth includes an artificial canine tooth which is an artificial tooth of a canine tooth, and when the reference denture is arranged on a plane assumed to be an occlusal plane with the artificial tooth side facing downward, a width of the anterior region of the base denture base is 0.5 mm or more and 3 mm or less from a base edge side front end of the anterior region of the base denture base to a base edge side lower by 2 mm in a longitudinal plane cut by: and a surface perpendicular to the plane and passing through the apex of the artificial canine tooth, the surface being along a normal direction to the polishing surface in the front region of the base.

In the above-described reference denture of the present invention, it is preferable that: the reference denture is a reference denture for an upper jaw, and in the longitudinal section, a height difference between a front end of the base front region on the base edge side and a peak of the artificial dog tooth is 13 mm to 20 mm.

In the above-described reference denture of the present invention, it is preferable that: the base denture is a base denture for an upper jaw, and the minimum thickness of the base palatal support portion is 0.5 mm to 3 mm.

In the above-described reference denture of the present invention, it is preferable that: the reference denture is a reference denture for a lower jaw, and in the longitudinal section, a height difference between a front end on the base edge side of the base front region and a peak of the artificial dog tooth is 13 mm to 18 mm.

In addition, according to a third aspect of the present invention, there is provided a denture manufacturing method having the following features.

The manufacturing method of the false tooth comprises the following steps:

(A) a reference denture preparation step of preparing a reference denture to be a reference denture component having a reference denture base member and an artificial tooth,

(B) a reference denture determining step of determining a shape of a reference denture to be used by (1) inserting the reference denture into an oral cavity of a patient to confirm a contact state between an oral mucosa of the patient and the reference denture, or (2) inserting the reference denture into an articulator to which an oral cavity model of the patient is attached, by placing the reference denture at an appropriate position on a virtual occlusion plane assumed to be a bite plane placed at a position to be medically present in the oral cavity of the patient, and confirming the contact state between the oral cavity model of the patient and the reference denture, and selecting a reference denture having another shape that does not cause improper contact in use when there is improper contact in use, or finely adjusting a shape of a base part of the reference denture so that contact does not occur,

(C) a stacking or transferring step of stacking a material for forming an uncured denture base for the adjustment member on an adhesive surface of the reference denture base member in the reference denture to be used in the reference denture determining step, disposing the reference denture having the material for forming a denture base stacked thereon at an appropriate position on the virtual occlusion plane in the patient's oral cavity or the articulator, transferring a shape of the patient's oral cavity mucosa or the patient's oral cavity model to the material for forming a denture base, and removing the remaining material for forming an edge, and a method of manufacturing the same

(D) A curing step of curing the curable denture base material after the stacking or transferring step;

the (C) stacking or transferring step includes:

(C1) A central stacking or transferring step of stacking an uncured material for a denture base in a central region of the base of the standard denture base member to transfer the shape of the model in the patient's oral cavity or the patient's oral cavity,

(C2) a front stacking or transferring step of stacking an uncured material for a denture base in the front region of the base of the standard denture base member, transferring the shape of the model in the patient's mouth or the patient's mouth, and extending the model from the edge of the base to form an edge, and

(C3) a posterior stacking or copying step of stacking an uncured material for a denture base in the posterior region of the base of the standard denture base member, copying the shape of the model in the patient's oral cavity or the patient's oral cavity, and extending the model from the base edge to form an edge;

after the central deposition or transfer step, the front deposition or transfer step and the rear deposition or transfer step may be performed simultaneously or individually.

In the above-described production method of the present invention, it is preferable that: in the standard denture preparation step, the standard denture of claim 7 is prepared, and the denture of claim 1 is manufactured.

In the above-described production method of the present invention, it is preferable that: after the front deposition or transfer step and the rear deposition or transfer step, a rinsing step is further included in which the material for the curable denture base in an uncured state is added to the mucosal surface side surface of the reference denture base, and the shape of the mucosal surface side surface is corrected.

(effect of the invention)

According to the present invention, a denture including a material component made of a reference denture as a component can be manufactured with further improved overall efficiency including preliminary inspection and adjustment by grinding without reducing individual patient suitability.

In addition, as a reference denture which can be used as a material part of a denture, the occurrence rate of a situation requiring adjustment by grinding through preliminary inspection can be significantly reduced.

In addition, in the method for manufacturing the denture, the denture can be effectively manufactured.

Drawings

Fig. 1 is a sectional view of a denture according to an embodiment of the present invention. The upper stage (a) and the lower stage (b) show vertical cross sections of artificial canine teeth of an upper denture and a lower denture, respectively, which are complete dentures (complete dentures) type dentures including a form for canine teeth.

Fig. 2 is a diagram showing a patient wearing an upper dental prosthesis and a lower dental prosthesis according to an embodiment of the present invention.

Fig. 3 is a perspective view illustrating an upper dental prosthesis according to an embodiment of the present invention.

Fig. 4 is a perspective view showing a reference denture for the lower jaw according to an embodiment of the present invention.

Fig. 5 is a side view showing a state in which an intra-oral cavity model of a patient is attached to an articulator used in a denture manufacturing method according to an embodiment of the present invention.

Fig. 6 is a view showing an alignment jig used when an upper dental prosthesis and a lower dental prosthesis are attached to an articulator or the oral cavity of a patient in the dental prosthesis manufacturing method according to the embodiment of the present invention, wherein (a) shows a top view, (b) shows a side view, and (c) shows a rear view.

Fig. 7 is a diagram showing a state in which the upper and lower reference dentures according to the embodiment of the present invention are engaged with each other.

Fig. 8 is a schematic view for explaining a preferred three-dimensional shape of a complete denture (complete denture) type maxillary denture having a form as a canine tooth or a first molar tooth, and is an embodiment of the present invention for explaining an X-shaped vertical cross section of an artificial canine tooth_A-X_A' location of the section and Y becoming the vertical section of the artificial first molar_A-Y_A' position of section view.

FIG. 9 shows a complete denture (complete) for a canine or a first molar tooth according to an embodiment of the present inventiondent) type dentures, which are a schematic view for explaining a preferable three-dimensional shape and are used for X-ray of a vertical cross section of an artificial canine tooth_B-X_B' location of the section and Y becoming the vertical section of the artificial first molar_B-Y_B' position of section view.

Fig. 10 is a schematic diagram for explaining a preferred three-dimensional shape of an upper dental prosthesis of a complete denture (complete denture) type including a form as a canine tooth or a first large molar tooth, in which the left diagram (a) is a diagram for explaining a height difference between a base edge side front end in a base front region and an upper jaw canine tooth apical top in an artificial canine tooth vertical section and a height difference between a highest point of a base palate base portion and an upper jaw canine tooth apical top, and the right diagram (b) is a diagram for explaining a height difference between a base edge side front end in a base front region and an upper jaw first large molar tooth mesial buccal apical top in an artificial first large molar tooth vertical section and a height difference between a highest point of the base palate base portion and a first large molar tooth mesial buccal apical top.

Fig. 11 is a schematic view for explaining a preferable three-dimensional shape of a complete denture (complete denture) type dentures including a form as canine teeth or first molar teeth in an embodiment of the present invention, the left side drawing (a) is a drawing for explaining a difference in height between the base edge side front end of the base front region and the mandibular canine cusp in the artificial canine vertical cross section, and a difference in height between the base edge side front end of the base tongue side flange portion and the mandibular canine cusp, and the right side drawing (b) is a drawing for explaining a difference in height between the base edge side front end of the base front region and the maxillary first large molar mesial cusp in the artificial first large molar vertical cross section, and a difference in height between the base edge side front end of the base tongue side flange portion and the maxillary first large molar mesial cusp.

Fig. 12 is a diagram showing a shape of the reference denture for the upper jaw according to the embodiment of the present invention in plan view, and is a diagram for explaining lengths of respective parts defining a preferred planar shape with reference to the length of the line segment PQ.

Fig. 13 is a diagram showing a shape of the reference denture for the lower jaw according to the embodiment of the present invention in a plan view, and is a diagram for explaining lengths of respective parts defining a preferred planar shape with reference to a length of a line segment pq.

Detailed Description

The denture of the present invention is a denture suitably manufactured by the denture manufacturing method of the present invention using the reference denture of the present invention as a material component, has a novel structure that has not been known so far, and the structure is a structure that is inevitably obtained by using the denture manufacturing method of the present invention. In addition, the point that can be manufactured by the denture manufacturing method of the present invention is one effect thereof. The denture manufacturing method of the present invention has the following effects: as a method more advantageous than the custom method (custom method), "the frequency of occurrence of cases requiring adjustment by grinding by preliminary inspection" which is not considered in the method disclosed in patent document 2 can be greatly reduced, and anybody can manufacture a highly accurate denture with good reproducibility without depending on the skill of the manufacturer.

Here, the customization method to be compared with the above-described effects and the method disclosed in patent document 2 are described first, and then the outline of the present invention is described. Before the present invention is specifically described, features of a general denture or a reference denture will be described to assist understanding, and then the denture, the reference denture, and a method for manufacturing the same according to the present invention will be described in order.

[1. Current denture production method (customized method) ]

The current denture manufacturing method (customized method) roughly includes the following steps 1 to 8.

[ procedure of the present denture manufacturing method (customized method): procedure ]

1: an impression is taken of the patient's oral cavity using the impression material.

2: a plaster mold is manufactured using the impression.

3: let the patient wear the bite plate (bite plate) and get the bite record.

4: artificial teeth are arranged on a bite plate and wax-molded dentures are manufactured.

5: the patient is allowed to try on the wax model denture and adjust the occlusion.

6: the wax pattern denture was embedded in plaster to produce a casting mold.

7: the resin is injected into a mold and hardened to produce a denture.

8: the manufactured artificial tooth is finely adjusted.

It should be noted that the step 8 generally includes the following three steps.

8-1: form correction

8-2: occlusion adjustment, and

8-3: inner surface adjustment as required

Steps 1, 2, 3, 5 described above are typically performed at a dental hospital, and steps 4, 6, 7 are typically performed at a dental clinic. Step 8 is mostly performed in both dental hospitals and dental clinics. The operations related to steps 1 to 8 described above are complicated and require professional (skilled) techniques. Further, since the worker and the work place are different, the manufacturing period is generally increased.

[2. method for producing dentures in patent document 2]

In order to reduce the time required for manufacturing the denture obtained through the above-described steps, the techniques disclosed in patent documents 2 and 3 are known for the denture using a denture base of a full denture type that is easily standardized.

The present inventors have noted that, when attempting to manufacture a denture by a method using the jig disclosed in patent document 3 using the reference denture disclosed in patent document 2, there are advantages that have not been recognized before, and have found that there are problems (points that need improvement) that have not been recognized in these patent documents. First, the above advantages are explained as follows: in step 7 of the above-described method of determination, the position of the artificial tooth to be placed may be displaced due to shrinkage of the resin serving as the base material at the time of curing, and therefore, in most cases, a long time is required for occlusion adjustment in step 8-2, whereas in the method of the present invention using the reference denture, such displacement of the artificial tooth does not occur, and therefore, the time required for occlusion adjustment is also significantly shortened.

On the other hand, points requiring improvement are explained as follows: when a denture is manufactured using a standard denture as described above, a simple preliminary examination is generally performed in which the standard denture for the upper jaw and/or the standard denture for the lower jaw are inserted into the oral cavity of a patient and the contact state with the mucous membrane or the like is confirmed. In the technique disclosed in patent document 2, the following is clear: when the occlusal state is not particularly noticed, the examination is performed using either the reference denture for the upper jaw or the reference denture for the lower jaw alone, but when the preliminary examination is performed while maintaining a good occlusal state, it is often determined that the adjustment by grinding is necessary. When such grinding is required, preliminary adjustment by grinding using a portable grinding machine or the like is required, but such preliminary adjustment leads to an increase in the time required for manufacturing the denture. Therefore, as a first point to be improved, the incidence of this condition must be reduced.

The second point where improvement is needed is as follows: when the deposition of the backing material (building up) and the transfer of the adhesive film surface are performed at once, it is difficult to perform the transfer with high precision, and the transfer state varies depending on the difference in the techniques of the worker, and there is room for improvement in this point.

[3. summary of the invention ]

Under the background described above, the present invention provides, as a first aspect of the denture of the present invention, a denture that can be manufactured while avoiding such problems.

The reference denture of the present invention, specifically, the upper dental reference denture and/or the lower dental reference denture of the present invention are material members constituting a part of the denture of the present invention, and the percentage of occurrences of the situation requiring adjustment by grinding can be significantly reduced in the preliminary examination in which the reference denture is inserted into the oral cavity of the patient or the articulator of the model in the oral cavity of the patient obtained in step 2 of the fixing method is worn.

In the denture manufacturing method of the present invention, the denture suitable for an individual patient can be efficiently manufactured by performing the deposition or transfer step in multiple stages to fit the mucosal surface of the reference denture base member to the oral mucosa of the patient. That is, according to the denture manufacturing method of the present invention, (1) adaptation of the mucosal surface of the central portion (the base central region) of the reference denture base, and (2) adaptation of the mucosal surfaces of the front portion (the base front region) and the rear portion (the base rear region), and formation and adaptation of the margin (the base margin) are separately performed, so that highly accurate copying can be easily performed, and further, variation in the copying state due to variations in the skill of the operator or the like can be suppressed.

The characteristics of the production method of the present invention will be described in more detail as follows: in the manufacturing method of the present invention, by using the reference denture of the present invention, the grinding adjustment in the above-described preliminary inspection is not necessary, or even in the case where grinding is necessary, the grinding amount can be significantly reduced.

The inventors of the present application have found, through research, the following: the individual differences among patients are large regarding the shapes of the vicinities of the base edges of the front flanges (also referred to as labial flanges or buccal flanges depending on the positions) of the maxillary and mandibular dentures and the vicinities of the palate base edges of the maxillary denture. In the manufacturing method of the present invention, the number of applicable patients is successfully increased by using the reference denture of the present invention in which the adjustment margin in these regions is increased.

When the shape and size of the reference denture are made small as described above, the adjustment margin becomes large, and therefore, if the position adjustment by the adjustment member is performed in one stage (specifically, the position adjustment is performed so as to achieve an ideal occlusion state when the denture is worn), it is inevitable that the variation becomes large due to the technical difference.

In contrast, in the production method of the present invention, first, the mucosal surface in the center region of the susceptor is adjusted to perform rough positioning. Next, the film surfaces of the front portion (base front region) and the rear portion (base rear region) are adapted and the edge (base edge) is formed and adapted with a small fluctuation width. Thus, anyone can perform high-precision positioning. In this case, the border formation is performed while the height of the front flange portion of the reference denture base or the length of the rear portion of the reference denture base is supplemented (extended) with a material for a denture base such as a spacer material, and thus the border with the patient's mucous membrane can be formed to be natural.

For this reason, according to the manufacturing method of the present invention, it is possible to efficiently manufacture a denture suitable for an individual patient with good reproducibility by anyone (not only a doctor but also other persons) without requiring a high degree of training.

Hereinafter, the general features of the denture and the reference denture as its main component will be briefly described, and then the denture of the present invention will be described. These general features, particularly the basic shape, the part name, the material, the method of use, and the like, are also applicable to the denture and the reference denture of the present invention.

[4. general features of dentures ]

Denture (denture with base) means: when the natural teeth and the peripheral tissues such as gingiva and alveolar bone are lost, the dental function such as chewing is restored, and the morphological change of the face and the trouble caused by the loss of teeth or the loss of the peripheral tissues are prevented. In the denture, a part for supplementing a defective (natural) tooth is an artificial tooth, and a part for supplementing a lost peripheral tissue is a denture base. In this denture base, the surface that comes into close contact with the alveolar ridge mucosa (the surface that is not polished from the standpoint of suitability in denture manufacture) is generally referred to as the mucosal surface (or basal surface), the surface that comes into contact with the buccal mucosa or tongue (the surface that is polished in denture manufacture) on the opposite side is generally referred to as the "polished surface", and the portion that forms the boundary between the two surfaces is referred to as the base edge. The boundary between the gingival-equivalent part of the denture base and the artificial tooth is called a "tooth neck part", and a part having an airfoil shape with the tooth neck part as a base end and the base edge as a tip end is called a flange. In addition, a portion of the denture base to which the artificial tooth is fixed is called a tooth space portion.

In the present invention, following such a designation, the surface of a denture (denture with a base) is divided into two surfaces, i.e., a surface to be adhered to the alveolar ridge mucosa and a surface opposite thereto, and the former is referred to as a "mucosal surface" and the latter is referred to as a "polishing surface".

The dentures are classified into a maxillary denture for the upper jaw and a mandibular denture for the lower jaw, and there are a complete denture used when all teeth are defective and a partial denture used when some teeth are defective. The comparison between the maxillary and mandibular dentures was as follows: both denture bases are common in that they have portions of alveolar ridge mucosa covering the labial and buccal sides of the oral cavity of a patient (in this specification, the direction toward the labial and buccal sides is referred to as the front), that is, portions referred to as "labial flange portions" and "buccal flange portions", but the shapes of the portions of mucosa covering the throat side of the oral cavity of a patient (in this specification, the direction toward the throat side is referred to as the rear) are largely different due to the difference in function and shape between the upper jaw and the lower jaw. That is, the posterior portion of the maxillary denture base is a portion called a palatal base portion covering the maxillary palatal mucosa, whereas the posterior portion of the mandibular denture base is a portion called a lingual flange portion covering the alveolar ridge mucosa on the mandibular lingual side, and the alveolar ridge is sandwiched between the lingual flange portion and the labial and buccal flange portions.

In addition, the front flange portion is divided into three regions, i.e., a left cheek-side flange portion, a labial flange portion, and a right cheek-side flange portion, according to the region where the front flange portion faces the left cheek-side flange portion. The boundary is not strictly determined, but the labial flange part means: the left buccal (right buccal) buccal flange refers to a region from the tooth neck toward the base edge among the central incisor, the lateral incisor and the canine: the area from the tooth neck toward the base edge in the first and second small molars, first and second large molars on the left side (right side). Among them, the canine tooth region is sometimes included on the buccal side.

The front flange portion is a portion common to the upper and lower denture bases, and the basic shape thereof is not changed, but the shapes thereof are slightly different depending on the functions and shapes of the upper and lower jaws. For example, on page 51 of "dental technician book with base denture technique complete denture technique" (yota yue kogaku, published by 3 months 1994 (published by japan dental drug press)), the standard height of the occlusion bank (occlusal rim) is described, and according to the description, the height of the occlusion bank for the upper jaw is 22 mm, the height of the occlusion bank for the lower jaw is 18 mm, and the occlusion bank for the lower jaw is slightly lower.

In this manner, in a denture, generally, the upper jaw and the lower jaw are divided into two regions, i.e., an anterior portion and a posterior portion, and are assigned part names (such part names are also referred to as binary division names). However, in the denture and the reference denture of the present invention, the area of the mucous membrane in the oral cavity of the patient covered by the denture base is divided into three areas, and a unique partial name (such a name is also referred to as a trisection name) is given. That is, (1) a region (portion) having an adhesive surface covering a mucous membrane in an area of the top of an alveolar ridge in the oral cavity of a patient is referred to as a central region, (2) a region (portion) having an adhesive surface covering an oral mucosa of a patient in front of the area of the alveolar ridge is referred to as a front region, and (3) a region (portion) having an adhesive surface covering an oral mucosa of a patient in back of the area of the top of the alveolar ridge is referred to as a back region.

The central region corresponds to a region composed of a partial region behind the labial margin and the buccal flange (included in the alveolar ridge top region) and a partial region in front of the palatal base plate or the lingual flange (included in the alveolar ridge top region) in the two division names. The front region corresponds to a main portion of the labial flange portion and the buccal flange portion except for a portion that becomes the central region. The posterior region corresponds to a main portion of the palatal base portion or the lingual flange portion except for a portion that becomes the central region. Therefore (although not completely identical, most of them overlap), the posterior regions of the maxillary denture and the mandibular denture in the three-division name are referred to as a palatal base portion and a lingual side edge portion, respectively, as in the two-division name.

As a material of the denture base, the following resins are generally used.

That is, a poly (meth) acrylate (poly (meth) acrylate) based resin in which at least one selected from methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-propyl (n-propyl) (meth) acrylate, butyl (meth) acrylate, homopolymers of these or copolymers of these is used; polyolefin (polyolefin) based resins (e.g., polypropylene); polyamide resin (e.g., NYLON66 (registered trademark)); polyester (polyester) based resins (e.g., polycarbonate); polyether (polyether) resins (e.g., polyacetal (polyacetal), polysulfone (polysulfonone)); polynitrile (polynitrile) based resins (e.g., polyacrylonitrile (polyacrylonitrile)); polyethylene (polyvinyl) based resins (e.g., polyvinyl acetate); cellulose (cellulose) based resins (e.g., cellulose acetate); fluorine resins (for example, polychlorofluoroethylene); imide resin (e.g., aromatic polyimide) and the like. These resin materials are often used only as resin materials, but may be used after adding a filler such as an organic filler, an inorganic filler, or an organic-inorganic composite filler. In addition, a metal material may be used for a part of the denture base.

The type and number of artificial teeth to be arranged are appropriately determined according to the intended denture, with respect to the artificial teeth to be arranged and fixed to the denture base. As for the number thereof, there may be one, but usually a plurality of artificial teeth are fixed. As the artificial tooth, a known artificial tooth made of resin or ceramic can be used. Examples of the artificial teeth made of resin include artificial teeth made of the above-mentioned poly (meth) acrylate resin, polyolefin resin, polyamide resin, polyester resin, polyether resin, polynitrile resin, polyethylene resin, cellulose resin, fluorine resin, imide resin, silicone resin, and the like. As a method for fixing the artificial tooth, a method known in the art such as fitting or adhesion can be used without limitation.

[5. general features of the Standard denture ]

The reference denture means: a prepared denture component used as a material component for simplifying the manufacture of a denture, more specifically: a denture component standardized to a predetermined shape or size and capable of mass production in a factory, a workshop, or the like as a component product satisfying predetermined specifications. Note that the term "finished" as used herein means a state that can be obtained as a component product.

The reference denture is composed of a reference denture base and an artificial tooth fixed thereto, and when the denture is manufactured using the reference denture base as a component, the artificial tooth portion of the reference denture becomes the artificial tooth portion of the denture, and the denture base (reference denture base) of the reference denture constitutes a main portion of the denture base of the denture. That is, the reference denture base is a portion to be a base (base) of a denture, and a space or a void (hereinafter, also referred to as a reference denture non-fitting space) formed between the mucosal surface of the reference denture base and the oral mucosa of an individual patient (as a wearer) is filled with a curable denture base material such as a spacer material, and the space or the void is fitted to the base (base) of the denture base (fit). The size of the reference denture is reduced in accordance with the portion of the reference denture unsuitable space called the adjustment margin, but the basic structure and shape of the reference denture are the same as those of the denture. Therefore, in the present invention, the reference denture is compared with the denture, the mucosal surface, the polishing surface, and the edge of the base are defined, and the respective regions (portions) of the reference denture are referred to as the central region of the base, the front region of the base, and the rear region of the base, respectively, based on the central region, the front region, and the rear region, which are the three division names of the regions (portions) of the corresponding denture.

That is, the reference denture includes a reference denture base having a base central region, a base front region, and a base rear region, and an artificial tooth fixed to the polishing surface side from the base central region to the base front region. In addition, the reference denture base and the artificial tooth in the reference denture do not have points that are particularly different from the denture base and the artificial tooth in the denture, except that the shape of the reference denture base is formed into the above-described shape.

For example, the reference denture base can be manufactured by various methods such as injection molding, extrusion molding, cutting, and photo-forming using a three-dimensional printer. The reference denture base and the artificial teeth (rows) may be integrally manufactured, or may be configured such that: after the reference denture base and the artificial tooth (row) are separately manufactured, the artificial tooth (row) is mounted on the tooth groove portion of the reference denture base. The former has an advantage that mass production by mass production is simplified, thereby enabling a significant reduction in production cost, and the latter has an advantage that an artificial tooth (row) suitable for an individual patient can be formed.

In addition, as a reference denture that has already been prepared, many variations in tooth arrangement and the like are not required, and reference dentures that are different only in relative size (dimension) are often prepared. In many cases, a standard denture for a complete denture (complete denture) in which all the dentitions are fixed is used.

In general, for a reference denture, in most cases, the planar shape of the base of the reference denture is designed to be a shape (in other words, a shape that is a common part of greatest common divisor) suitable for most patients, based on a large amount of clinical data or data relating to the oral cavity shapes of a large number of people with teeth and people without teeth, from the viewpoint of the purpose of use thereof (see patent document 2). However, as far as the present inventors know, there is no example in which the three-dimensional shape is optimized or defined in consideration of the amount of material for the denture base such as a spacer material used, the frequency of adjustment by grinding in preliminary inspection, and the strength of the reference denture.

[6 ] denture according to one embodiment of the present invention ]

Hereinafter, a complete denture (complete denture) type denture 1 according to an embodiment of the present invention will be described with reference to fig. 1 and 2. As shown in fig. 1 and 2, the denture 1(1A, 1B) has a basic structure in which artificial teeth 31(31A, 31B) or artificial tooth rows 30(30A, 30B) are fixed to a denture base 2(2A, 2B), as in a general denture.

Further, the denture has, as in a general denture manufactured using a reference denture: the reference denture component 5(5A, 5B) having the artificial tooth 31(31A, 31B) and the adjustment component 6 made of a hardened body of a denture base material are fixed to the reference denture base component 4(4A, 4B). The denture base 2(2A, 2B) further includes: the reference denture base member 4(4A, 4B) and an adjusting member 6 joined to the reference denture base member 4(4A, 4B). The reference denture base member 4(4A, 4B) serves as a base (base) that constitutes a main portion of the denture base 2(2A, 2B), and the adjustment member 6 constitutes the remainder of the denture base 2 in the configuration shown in fig. 1 and 2.

Further, the denture base 2(2A, 2B) of the present embodiment includes, as in the case of a typical denture of the related art: the three divisions of the name central regions 2a1, 2B1, front regions 2a2, 2B2 and rear regions 2A3, 2B 3. The base denture base member 4(4A, 4B) has base central regions 20a1, 20B1, base anterior regions 20a2, 20B2, and base posterior regions 20A3, 20B3, respectively, corresponding to the respective regions, as in the case of a typical base denture base of the related art. The reference denture base component 4(4A, 4B) is provided with the same reference denture base component 4 as the reference denture base component 10 (see fig. 3 and 4) of the present embodiment (see fig. 4).

The denture 1 of the present embodiment has the following major features: in all of these regions, the reference denture base member 4(4A, 4B) constitutes the main part of the denture base 2(2A, 2B), and is joined to the adjustment member 6 in a specific manner.

Namely, the first feature is as follows. The adjusting member 6 includes: and central adjustment members 6a1, 6B1 that constitute the remaining portions of the central regions 2a1, 2B1 excluding the reference denture base members 4(4A, 4B) and are joined to the mucosal surfaces 23A, 23B of the base central regions 20a1, 20B 1. Further, the adjusting member 6 includes: and anterior adjustment members 6a2, 6B2 that constitute the remaining portions of the anterior regions 2a2, 2B2 excluding the reference denture base members 4(4A, 4B) and are joined to the mucosal surfaces 23A, 23B of the base anterior regions 20a2, 20B 2. Further, the adjusting member 6 includes: and posterior adjustment members 6A3 and 6B3 which constitute the remaining portions of the posterior regions 2A3 and 2B3 excluding the base denture base members 4(4A and 4B) and which are joined to the mucosal surfaces 23A and 23B of the base posterior regions 20A3 and 20B 3.

Therefore, at least a part of each of the mucosal surfaces 1a4 and 1B4 in the central regions 2a1 and 2B1, the front regions 2a2 and 2B2, and the rear regions 2A3 and 2B3 is constituted by the central adjustment members 6a1 and 6B1, the front adjustment members 6a2 and 6B2, and the rear adjustment members 6A3 and 6B3, respectively.

Further, the second feature is: at least a part of the base edge 1a6, 1B6 side front end region in the front regions 2a2, 2B2 and the rear regions 2A3, 2B3 is constituted by the front adjusting members 6a2, 6B2 and the rear adjusting members 6A3, 6B3, respectively.

The central adjustment member 6a1(6B1), the front adjustment member 6a2(6B2), and the rear adjustment member 6A3(6B3) do not necessarily have to be independent from each other, and may be connected to each other so as to cover the entire mucosal surface of the reference denture base member 4A (4B).

In general, in the denture 1(1A, 1B) according to the present embodiment, the reference denture base member 4(4A, 4B) has a standardized predetermined shape (a predetermined shape in mass production) or a shape substantially identical to the standardized predetermined shape. The "substantially same shape" herein refers to a shape that is slightly changed from a predetermined shape by simple fine adjustment by grinding or the like. The adjustment member 6 has a shape adjusted according to the shape of the oral cavity of the patient, and thus, in a state where the denture is worn in the oral cavity of an individual patient to be a wearer, a "occlusal surface" that is a curved surface where upper and lower teeth (here, the teeth refer to an artificial tooth fixed to the denture and a natural tooth when the patient has a natural tooth) are in close contact is approximated to a "occlusal plane" that is a plane, and is disposed at a position that is supposed to exist medically in the oral cavity of the patient.

The denture 1(1A, 1B) according to the present embodiment has the above-described structure, and has a suitability comparable to that of a denture obtained by a customization method, and can be easily manufactured in a short period of time by the manufacturing method according to the present embodiment.

The denture 1(1A, 1B) according to the present embodiment is formed by a resin denture base material that is obtained by curing a curable denture base material that is a material of the adjustment member 6. The denture base material is a material which comprises a monomer (polymerizable monomer) as a raw material of the resin material, a polymerization initiator, and a filler added as needed, is in a paste (paste) or a sticky cake state before curing, can be plastically deformed, and can maintain its form without being subjected to stress. As for the polymerization type of the material for the denture base, there are photopolymerization type, thermal polymerization type, chemical polymerization type, microwave polymerization type, and the like depending on the type of the polymerization initiator used, but from the viewpoint of workability, the photopolymerization type is preferable.

The denture of the present embodiment is preferably, from the viewpoint of the magnitude of the effects: the artificial teeth include one or more artificial teeth selected from at least one tooth selected from the group consisting of a first small molar tooth, a second small molar tooth, a first large molar tooth, and a canine tooth, and are particularly preferably formed as: the three or more artificial teeth 31(31A, 31B) including the artificial canine teeth 31A3, 31B3 (see fig. 7, 10, and 11) are fixed individually and/or in a connected state (hereinafter, also referred to as a canine tooth-containing form), and more preferably: a denture, particularly preferably a complete denture, in which three or more artificial teeth 31(31A, 31B) including artificial canine teeth and artificial first molar teeth 31A6, 31B6 are fixed (hereinafter, also referred to as canine teeth or first molar teeth-containing form).

Further, it is preferable that: in the case where a boundary portion between the artificial tooth and the front grinding surface of the denture base is a tooth neck portion, a portion in a wing shape from the tooth neck portion to a base plate edge is a flange, a portion in a front side of the flange, which is a base end of the tooth neck portion of the necessary artificial tooth and a portion in an extension line of the flange, which is a tip end, is a front flange portion of the necessary artificial tooth, the base plate edge portion of the front flange portion of the necessary artificial tooth in the artificial tooth is constituted by the front adjustment member, and when there are a plurality of the necessary artificial teeth, the base plate edge portion of the front flange portion of the necessary artificial tooth in at least one of the artificial teeth is constituted by the front adjustment member, and 5% to 65% (hereinafter, "x to y" may be abbreviated as "x to y") and is constituted by the front adjustment member.

In the canine tooth-containing form, the artificial tooth front flange portion is required to be a portion having, as a proximal end, the neck portions 1a7 and 1B7 of the front polished surfaces 1a5 and 1B5 in which the artificial canine tooth portion is present, and having, as a distal end, the base edges 1a6 and 1B6 on the extension lines thereof. In the above canine tooth-containing form, it is preferable that: when the front edge of the necessary artificial teeth relating to the artificial dog teeth is defined as the front edge of the dog teeth, at least a part of the base edge of the front edge of the dog teeth is constituted by the front adjusting members 6a2 and 6B2, and further, 5% to 65% of the polished surface of the front edge of the dog teeth is constituted by the front adjusting members 6a2 and 6B 2. In the canine or molar-containing form, the artificial front flange portion of the artificial first large molar is formed by a portion having the tooth necks 1a7 and 1B7 of the artificial first large molar 31a6 and 31B6 of the front grinding surfaces 1a5 and 1B5 as the base end and the base edges 1a6 and 1B6 on the extension lines thereof as the tip end. In the canine or molar containing form, it is preferable that: when the necessary artificial tooth front flange portion of the artificial first large molar is used as the first large molar front flange portion, the base edge of the rearmost molar front flange portion is constituted by the front adjusting members 6a2 and 6B2, and the front adjusting members 6a2 and 6B2 constitute 5% to 65% of the polished surface of the first large molar front flange portion, in addition to satisfying the preferable conditions in the dog-tooth-containing form.

Although the features common to the dentures 1(1A and 1B) for the upper jaw and the lower jaw in the present embodiment have been described above, the dentures for the upper jaw and the lower jaw are different from each other as described above, and the difference is reflected in the dentures in the present embodiment. That is, in the denture 1A of the present embodiment for the upper jaw, the denture base 2 has, as the rear region, the denture base 2A for the upper jaw as the palate base 2A3 covering the maxillary palate mucosa of the patient. The reference denture component 5 is an upper dental reference denture component 5A in which the artificial tooth 31A is fixed to an upper dental reference denture base 4A having a base palatal base 20A3 which constitutes a main part of the palatal base 2A3 in the posterior region of the base. Further, the palatal support portion 2A3 includes a palatal support adjustment portion 6A3 formed of the posterior adjustment member.

In the denture 1A of the present embodiment for the upper jaw, which is a dog-tooth-containing form, it is preferable that: at least a part of the base edge of the canine front flange portion is constituted by the front adjustment member 6a2, and 10% to 65%, particularly 10% to 60% or less of the polished surface of the canine front flange portion is constituted by the exposed surface of the front adjustment member 6a 2.

On the other hand, in the denture 1B of the present embodiment for the lower jaw, the denture base 2 has, as the rear region, a denture base 2B for the lower jaw which is a lingual flange 2B3 covering the mucous membrane surface of the lingual alveolar ridge of the patient.

The reference denture component 5 is a mandibular reference denture component 5B in which the artificial tooth 31B is fixed to a mandibular reference denture base 4B having a base tongue side flange portion 20B3 which is a main portion of the tongue side flange portion 2B3 in the base rear region. The tongue-side flange portion 2B3 includes a tongue-side flange adjustment portion 6B3 formed of the rear adjustment member.

In addition, in the denture 1B of the present embodiment for the lower jaw in the form of a canine tooth, it is preferable that: at least a part of the base edge of the canine front flange portion is constituted by the front adjustment member 6B2, and 5% to 60%, particularly 10% to 60% or less of the canine front flange portion is constituted by the exposed surface of the front adjustment member 6B 2.

Here, as shown in fig. 1 (a), of the mucosal surfaces of the upper jaw reference denture base 4A (upper jaw reference denture component 5A), the radius of curvature of the mucosal surface on which the central adjustment member 6a1 is disposed is smaller than the radius of curvature of the mucosal surface on which the anterior adjustment member 6a2 and the palate base adjustment member 6A3 are disposed. By thus making the radius of curvature of the portion where the center adjustment member 6a1 is disposed small, positioning when forming the anterior adjustment member 6a2 and the palatal plate adjustment member 6A3 is facilitated. On the other hand, in the case where the non-fitting space of the reference denture is filled with the denture base material due to the reduction in the radius of curvature to achieve fitting to the oral mucosa surface of the patient, when trying to perform fitting in one operation, only a slight force is applied and the front and rear portions easily move up and down with the portion as a fulcrum, and therefore, a high-level technique is required for highly accurate fitting. However, when the manufacturing method of the present invention is adopted, the above-described advantage of easy positioning can be obtained, and the occurrence of such a rattling can be suppressed.

As shown in fig. 1 (B), of the mucosal surfaces of the mandibular reference denture base 4B (mandibular reference denture component 5B), the radius of curvature of the mucosal surface on which the central adjustment member 6B1 is disposed is smaller than the radius of curvature of the mucosal surface on which the front adjustment member 6B2 and lingual flange portion 6B3 are disposed. In addition, the above-described reference denture base 4A for the upper jaw is the same in that the curvature radius of the portion where the center adjusting member 6B1 is disposed is made small, positioning when forming the front adjusting member 6B2 and the lingual flange adjusting portion 6B3 is facilitated, and occurrence of wobbling can be suppressed by using the manufacturing method of the present invention.

The central region 2a1 of the upper dental reference denture base 4A (upper dental reference denture component 5A) is located in the vicinity of the artificial teeth 31. Therefore, as is apparent from the planar shape (see fig. 12) of the standard denture 10A for the upper jaw described later, the central region 2a1 has an arcuate shape (U-shape). In addition, by arranging the denture base material that becomes at least a part of the central adjustment member 6a1 in at least three places of the central portion of the curved portion of the arcuate central region 2a1 and other parts (including the vicinity of both ends), generally over the entire region, positioning with respect to the shape of the patient's oral cavity is performed even at the stage when the denture base material that has not yet been arranged as at least a part of the anterior adjustment member 6a2 and the palate base adjustment member 6A3 is not yet arranged.

[7 ] Standard denture according to one embodiment of the present invention ]

The reference denture according to an embodiment of the present invention is a reference denture used as the reference denture component in the denture according to an embodiment of the present invention.

Referring to fig. 3 and 4, the reference denture 10(10A, 10B) of the present embodiment, which is preferably used as the reference denture component 5 of the denture 1 of the present embodiment, will be described below.

The reference denture 10(10A, 10B) has a basic structure in which an artificial tooth 31 or an artificial dentition 30 is fixed to a reference denture base 20, as in a general reference denture of the related art. The reference denture base 20 includes: base center regions 20a1, 20B1, base front regions 20a2, 20B2, and base rear regions 20A3, 20B3 respectively corresponding to center regions 2a1, 2B1, front regions 2a2, 2B2, and rear regions 2A3, 2B3 in the denture base 2 of the denture 1. In the reference denture 10, the partial names of the base edges 22A, 22B (labial base edges 22A1, 22B1 and buccal base edges 22A2, 22B2), the mucous surfaces 23A, 23B, the polishing surfaces 24A, 24B, the tooth necks, and the like have the same meanings as those of the dentures of the related art and the reference dentures of the related art.

Regarding the planar shape of the standard denture including the standard denture of the present embodiment, the conventional standard denture is optimized to fit many patients based on a large amount of clinical data or a large amount of data relating to the oral shapes of the person with or without teeth (see patent document 2). Further, a reference denture having an appropriate size as a material member of the denture for the patient is selected and used according to the size of the inside of the oral cavity of the patient.

Here, regarding the three-dimensional shape of the reference denture, there are the following conventional reference dentures: a basic design idea of ensuring the reference denture non-fitting space as an adjustment margin based on the material for the denture base. However, as a specific method for securing the unsuitable space of the reference denture, it is common to make the thickness of the reference denture base thin uniformly (see patent document 1), and it is not optimized as intended.

In contrast, in the reference denture of the present embodiment, the three-dimensional shape of the reference denture is defined in consideration of the extent of the fit range of the reference denture (in other words, the extent to which the frequency of adjustment by grinding is low in the preliminary inspection), the ease of adjustment of the mucosal surface using the denture base material, the amount of the denture base material used at this time, the strength of the reference denture, and the like. That is, when the above-described denture base 2 is formed into the basic shape, the thickness of at least a part of each of the center region, the front region, and the rear region of the base is made significantly thinner than the thickness of the center region, the front region, and the rear region, and the height of the base edge in the front region of the base is made significantly lower than that of a standard denture in the related art, so that a space is secured in which the center adjusting members 6a1 and 6B1, the front adjusting members 6a2 and 6B2, and the rear adjusting members 6A3 and 6B3 can be joined.

Hereinafter, the planar shape and the three-dimensional shape of the reference denture of the present invention will be described in further detail.

(7-1. regarding the preferred planar shape)

As the planar shape of the reference denture of the present invention, a planar shape as described in patent document 2 is preferable. Such a planar shape will be described below with reference to fig. 12 and 13.

As a preferable plane shape, regarding the reference denture for the upper jaw, a point corresponding to the maxillary incisal line of the left side pterygoid process on the posterior edge of the base is set as a first reference point for the upper jaw: p (p), regarding the reference denture for the lower jaw, a point corresponding to the left side posterior molar pad at the posterior edge of the base is set as a first reference point for the lower jaw: p (p). Similarly, a point corresponding to the right side winged-process maxillary incisal trace of the reference denture for the upper jaw and a point corresponding to the right side molar back pad of the reference denture for the lower jaw are respectively set as the second reference points for the upper jaw (for the lower jaw): q (q). Further, points corresponding to the upper (lower) labial frenulum in the center of the labial base edge were defined as third reference points for the upper jaw (for the lower jaw): o (o). In addition, the following shapes are shown: segment connecting p (p) and q (q): the length of pq (pq) is set to be a reference length, and the length from a plurality of points (points) defined at predetermined positions on two reference line segments op (op) and oq (oq) connecting the third reference point and the first and second reference points to the base edge and the length of a line segment om (om) when the midpoint of the line segment pq (pq) is set to be m (m) are set to be within predetermined ranges, respectively. The reference point and the plurality of points are not necessarily present on the same plane, but the difference in height between the line segment lengths of the predetermined shape is very small, and therefore the reference point and the plurality of points are handled as a planar shape in the present specification.

Hereinafter, the above-described plurality of points and the length from each point to the edge of the base (relative length normalized by the reference length) will be described in terms of an upper dental reference denture and a lower dental reference denture.

(1) Reference denture for upper jaw

The points of the standard denture for the upper jaw are as follows: three points (from the front to the rear, points P1, P2, and P3) which exist on the line segment OP and divide the line segment into four equal parts, and three points (from the front to the rear, points Q1, Q2, and Q3) which exist on the line segment OQ and divide the line segment into four equal parts. In addition, the following points are determined: points intersecting the front base edge (D1, D2, and D3 as points corresponding to P1, P2, and P3, and E1, E2, and E3 as points corresponding to Q1, Q2, and Q3) are drawn along a perpendicular line perpendicular to the line segment OP or the line segment OQ existing at each point. The length from each point to the base edge is: the relative lengths of the line segment connecting the two corresponding points, i.e., the line segment P1D1, the line segment P2D2, and the line segment P3D3, and the line segment Q1E1, the line segment Q2E2, and the line segment Q3E3, with respect to the line segment PQ.

The preferred planar shape of the upper denture base is as follows: the length of the line OM is 0.76-0.98, the lengths of the line P1D1 and the line Q1E1 are 0.11-0.36 respectively, the lengths of the line P2D2 and the line Q2E2 are 0.19-0.45 respectively, and the lengths of the line P3D3 and the line Q3E3 are 0.16-0.45 respectively.

(2) Reference denture for lower jaw

The points of the mandibular reference denture are points P1, P2, P3, Q1, Q2, Q3, and M corresponding to the points P1, P2, P3, Q1, Q2, Q3, and M, respectively, which are the points for the maxillary denture. The length from each point to the base edge includes not only the length from the front base edge but also the length from the front base edge to the rear base edge. The lengths of the front base edge are a line segment p1d1, line segments p2d2 and p3d3, line segment q1e1, line segments q2e2 and q3e3, and line segment om corresponding to the maxillary denture base. The length of the rear base edge is a relative length as follows: when a perpendicular line perpendicular to the line segment op or the line segment oq existing at each point is drawn, the relative lengths of the points intersecting the rear base edge (b 1, b2, and b3 as points corresponding to p1, p2, and p3, and c1, c2, and c3 as points corresponding to q1, q2, and q3) and the line segments connecting the intersections of the base edges on both sides thereof with each other, that is, the line segment d1b1, the line segment d2b2, the line segment d3b3, the line segment e1c1, the line segment e2c2, and the line segment e3c3 with respect to the line segment pq, are determined.

The preferred planar shape of the denture base for the lower jaw is as follows: the length of the line segment om is 0.74-0.94, the lengths of the line segments p1d1 and q1e1 are 0.11-0.32, the lengths of the line segments p2d2 and q2e2 are 0.13-0.34, the lengths of the line segments p3d3 and q3e3 are 0.14-0.33, the lengths of the line segments d1b1 and e1c1 are 0.14-0.40, the lengths of the line segments d2b2 and e2c2 are 0.19-0.41, and the lengths of the line segments d3b3 and e3c3 are 0.21-0.42. At this time, the following is shown based on the positional relationship of the respective points: p1b1 > p1d1, e1c1 > q1e1, p2b2 > p2d2, e2c2 > q2e2, p3b3 > p3d3, e3c3 > q3e 3.

(7-2. regarding the preferred three-dimensional shape)

In the reference denture of the present invention, based on the new knowledge that "in the above-mentioned preliminary examination, the portion having a high frequency of improper contact with the patient's mucous membrane or the like is the base edge periphery of the base front region and the base edge periphery of the base rear region, and in the latter case, the portion can be dealt with by optimizing the planar shape, but in the former case, the portion cannot be dealt with only by optimizing the planar shape", the height of the base front region is reduced and the thickness thereof is reduced within the range where the improper contact portion does not occur as much as possible.

In the present invention, the preferable ranges of the height and width (thickness) of the base front region are defined by using a predetermined cross section described below.

(7-3. section for defining the reference for the preferred three-dimensional shape)

In the reference denture of the present invention, one artificial tooth is focused on and defined as a reference artificial tooth. A specific point on the reference artificial tooth is defined as a reference point, and the reference denture is arranged on an imaginary occlusal plane with the artificial tooth side facing downwardThe height and width (thickness) are defined by the shape of a vertical section (hereinafter, also referred to as a reference artificial tooth vertical section) cut by a plane perpendicular to the plane and passing through a reference point of the reference artificial tooth and along a normal direction to the ground plane of the base front region. For example, although details will be described later, the reference artificial tooth is an artificial canine tooth vertical cross section (corresponding to X) which is a reference artificial tooth vertical cross section in the upper jaw reference denture when the reference artificial tooth is an artificial canine tooth_A-X_A' section plane) and the polishing plane in the front area of the base as shown in fig. 8, and an artificial canine vertical section (corresponding to X) which is a reference artificial tooth vertical section in the reference denture for the lower jaw_B-X_B'cross section') and the above-described abrasive surface of the base front region are as shown in fig. 9.

Before explaining a preferred shape of the vertical cross section of the reference artificial tooth, the occlusal plane will be explained. First, when the occlusion is described, the occlusion refers to a state in which upper and lower teeth bite each other, and a surface where the upper and lower teeth are in close contact with each other is referred to as an occlusion surface. In general, natural teeth are arranged so as to be projected and curved downward (this curve is also called a spe curve) in accordance with the shape of the jaw, and therefore, the occlusal surface is a curved surface that describes a large arc in a side view in accordance with the arrangement state. The curvature radius ratio of the curved surface which becomes the occlusal surface is large, and therefore, the curved surface can be approximated to a flat surface. The plane thus approximated is then the occlusal plane.

The above-mentioned occlusion plane is preferably present at the following positions: a position parallel to a plane called a campher's plane, which is a medically virtual plane connecting the lower edge of the nasal ala and the upper edge of the ear beads on both sides, is a position below about 20 mm (usually, 18 mm to 22 mm) from the subnasal point in a direction perpendicular to the campher plane. In a denture, in general, the shape thereof is adjusted as follows: in a state where the dental prosthesis is worn in the oral cavity of a patient and the upper and lower teeth (the teeth herein refer to an artificial tooth fixed to the denture and a natural tooth when the patient has the natural tooth) are in close contact with each other as much as possible, the occlusal plane is disposed at a position where the plane inclination from the position is in the range of an elevation angle +4 ° to-7.64 ° (hereinafter, such a position is also referred to as an ideal position or a medically ideal position).

When the denture is worn with the upper body upright (arranged at an ideal position), the occlusal plane is a plane inclined at a certain angle (with individual difference) from the horizontal plane. In the description of the virtual occlusion plane PA assumed to be an occlusion plane arranged at a position where a patient should be located medically in the oral cavity of a patient with reference to fig. 7, 10 and 11, in fig. 7 showing an ideal occlusion state, a plane defined by three points a1, a2 and A3 described below is the virtual occlusion plane PA. Here, point: a1 represents the midpoint of the mesial angle of the left and right central incisors 31B1 of the reference denture 10B for lower jaw, point: a2 denotes the distal buccal cusp of the left second large molar 31B7 of the reference denture 10B for the lower jaw, point: a3 denotes the distal buccal cusp of the right second large molar tooth 31B7 of the reference denture 10B for the lower jaw.

As described above, although the occlusal plane and the position where the occlusal plane is to be arranged (ideal position) are strictly defined, the reference denture of the present invention does not need to be a complete denture (complete denture), and the upper and lower basic dentures do not need to be a set (set). In determining the vertical cross section of the reference artificial tooth, the occlusal plane does not need to be arranged at an ideal position, and may be determined by arbitrarily inclining the occlusal plane as long as the relative relationship is maintained. For example, when the occlusal plane is inclined to become horizontal, the reference artificial tooth vertical section becomes a vertical plane passing through the reference point along the normal direction with respect to the front area polishing surface. Here, since all the artificial teeth are in close contact with the occlusal surface and can be approximated to a plane (occlusal plane) and the plane can be defined at the minimum limit of 3 points, in the present invention, a vertical plane passing through the reference point and along a normal direction to the front polishing surface when the artificial teeth are disposed on a horizontal plane so as to face downward is defined as the reference artificial tooth vertical section with respect to the reference denture base to which three or more artificial teeth are fixed. In addition, a reference artificial tooth base having less than three artificial teeth is estimated as a normal wearing state, and a vertical plane passing through the reference point and along a normal direction to the front polishing surface when held on a horizontal plane without changing a relative positional relationship with an occlusal plane at that time is taken as the reference artificial tooth vertical cross section. Further, since the teeth have irregularities at the distal ends thereof and the upper and lower teeth are slightly displaced to bite, or in the case of a partial denture, slight displacement from the occlusal plane varies depending on the position thereof, a reference artificial tooth vertical cross-section based on the plane when the artificial teeth are arranged on the horizontal plane so as to face downward may be slightly displaced from a reference artificial tooth vertical cross-section based on the occlusal plane, but this displacement hardly affects the definition of a preferable three-dimensional shape described later, and is negligible.

(7-4. preferred three-dimensional shape of the reference denture according to the present invention)

A preferred three-dimensional shape will be described with reference to the reference artificial tooth vertical cross-section thus determined, with reference to fig. 8, 10 (a), 9, and 11 (a).

In the reference denture of the present invention used as the reference denture component of the denture of the present invention having the form of dog teeth, a preferred three-dimensional shape is defined by an artificial dog tooth vertical section which is a reference artificial tooth vertical section when the artificial dog tooth 31A3 is used as a reference artificial tooth and the cusp 31A3p is used as a reference point. The vertical section of the artificial canine tooth is equivalent to X in FIG. 8_A-X_A' section plane and X in FIG. 9_B-X_B' section, the sectional shapes of which are shown in fig. 10 (a) and fig. 11 (a), respectively, but it is preferable that: in the artificial dog tooth vertical cross section, the width (thickness) of the base forward region below 2 mm from the base edge side front end of the base forward region is 0.5 mm to 3 mm, and particularly preferably 0.5 mm to 2 mm. Further, it is preferable that: the artificial dog teeth are vertically sectioned from the baseThe width (thickness) of the base front region in the front region from the base edge side front end to below 4 mm is also 0.5 mm to 3 mm, and particularly preferably 0.5 mm to 2 mm. By setting the width (thickness) in such a range, it is possible to further reduce the labor and time required for grinding the flange in the preliminary inspection while securing the strength in practical use.

Further, in the reference denture of the present invention, it is preferable that the artificial canine vertical cross-section satisfies the following conditions depending on whether the reference denture is an upper jaw reference denture or a lower jaw reference denture.

(7-5. preferred three-dimensional shape of the Standard denture for Upper jaw of the present invention)

That is, as shown in fig. 8 and 10 (a), when the reference denture of the present invention is an upper jaw reference denture, first, the above-mentioned artificial canine tooth vertical section (corresponding to X in fig. 8)_A-X_A' section plane) is preferably 13 mm to 20 mm, more preferably 15 mm to 17 mm, in a height difference (which may be abbreviated as LA1) between the base-edge-side front end of the base front region and the reference point (the apex 31A3p of the artificial dog tooth 31 A3). The height difference is a height difference in which a direction perpendicular to the occlusion plane PA is defined as a height direction with respect to the occlusion plane PA, and is the same for other height differences defining a preferred three-dimensional shape.

Second, from the viewpoint that the adjustment margin in the relatively anterior portion of the base palatal base portion becomes larger, and thus improper contact is more likely to occur, in the artificial dog tooth vertical section, the difference in elevation (also abbreviated as LA2 in some cases) between the highest point HA of the base palatal base portion and the reference point (the apex 31A3p of the artificial dog tooth 31 A3) is preferably 10 mm to 16 mm, and more preferably 13 mm to 15 mm.

Third, the minimum thickness of the base palatal supporter is preferably 0.5 mm to 3 mm, and more preferably 0.5 mm to 2 mm.

As shown in fig. 8 and 10 (b), the reference denture of the present invention used as the reference denture component of the denture of the present invention including the canine teeth or the first molar teeth and the complete denture (complete denture) is not limited to the one shown in fig. 8 and 10 (b)In addition to satisfying the above condition in the artificial canine tooth vertical section, it is preferable that: an artificial first molar vertical section (corresponding to Y in fig. 8) which is a reference artificial tooth vertical section when the artificial first molar tooth 31A6 is used as a reference artificial tooth and the mesial buccal pinnacle 31A6p is used as a reference point_A-Y_A' profile) satisfies the following condition.

That is, fourth, the difference in level (also abbreviated to LA3 in some cases) between the base edge side front end of the base forward region in the artificial first large molar vertical section and the reference point (the mesial cheek side apical tip 31A6p of the artificial first large molar 31 A6) is preferably 11 mm to 16 mm, and more preferably 12 mm to 14 mm.

Fifth, from the viewpoint that the adjustment margin in the relatively rear portion of the base palatal supporter becomes larger, and thus improper contact is more likely to occur, in the vertical cross section of the artificial first large molar, the difference in height (also abbreviated as LA4 in some cases) between the highest point HA' of the base palatal supporter and the reference point (the mesial buccal pointed tip 31A6p of the artificial first large molar 31 A6) is preferably 11 mm to 18 mm, and more preferably 15 mm to 17 mm.

(7-6. preferred three-dimensional shape of the reference denture for the lower jaw of the present invention)

When the reference denture of the present invention is a reference denture for the lower jaw, as shown in fig. 9 and 11 (a), the artificial canine tooth is vertically sectioned (corresponding to X in fig. 9)_B-X_B' section plane) is preferably 13 mm to 18 mm, more preferably 15 mm to 17 mm, in a height difference (also abbreviated as LB1 in some cases) between the base-edge-side front end of the base front region and the reference point (the apex 31B3p of the artificial dog tooth 31B 3).

Second, from the viewpoint that the adjustment margin in the relatively forward portion of the base tongue-side edge portion becomes larger, and thus improper contact is more likely to occur, in the artificial dog tooth vertical cross-section, the height difference (also abbreviated as LB2 in some cases) between the base edge side front end HB of the base tongue-side edge portion and the reference point is preferably 9 mm to 13 mm, and more preferably 10 mm to 12 mm.

Third, as shown in fig. 9 and 11 (b), the above-described artificial first large molar is vertically sectioned (opposite phase)Y in FIG. 9_B-Y_B' section plane) is preferably 11 mm to 15 mm, more preferably 12 mm to 14 mm, in the height difference (also abbreviated as LB3 in some cases) between the base edge side front end of the base front region and the reference point (mesial cheek side apical tip 31B6p of artificial first large molar tooth 31B 6).

Fourth, from the viewpoint that the adjustment margin in the relatively rear portion of the base tongue side edge portion becomes larger, and thus improper contact is more likely to occur, in the vertical cross section of the artificial first large molar, the height difference (also abbreviated as LB4 in some cases) between the base edge side front end HB' of the base tongue side edge portion and the reference point is preferably 11 mm to 17 mm, and more preferably 14 mm to 16 mm.

(7-7. about the preferred three-dimensional shape when having the preferred planar shape)

As described above, the reference denture of the present invention is preferably formed in a planar shape as described in patent document 2. In this case, as for the LA1 to LA4 and LB1 to LB4, the line segment of the reference length described in patent document 2: when the length of pq (pq) is 1 and the length of the line segment pq is 1 for the reference denture for the lower jaw, the preferred lengths of LA1 to LA4 and LB1 to LB4 are described below in the order of preferred ranges, more preferred ranges in the reference denture of the present invention.

LA1：0.28～0.50；0.32～0.43

LA2：0.21～0.40；0.28～0.38

LA3：0.23～0.40；0.26～0.35

LA4：0.23～0.45；0.32～0.43

LB1：0.21～0.35；0.25～0.33

LB2：0.15～0.25；0.16～0.24

LB3：0.18～0.29；0.20～0.27

LB4：0.18～0.33；0.23～0.31

[8. method for producing the present invention ]

In the manufacturing method of the present invention, the denture of the present invention is manufactured. In the denture of the present invention produced at this time, the reference denture base member preferably includes: the dental prosthesis has a standardized predetermined shape (a mass-produced predetermined shape) or a shape substantially identical to the standardized predetermined shape, and the adjustment member has a shape adjusted according to the internal shape of the oral cavity of the patient, so that an occlusal plane determined by an occlusal surface of a surface where upper and lower teeth (here, the teeth refer to an artificial tooth fixed to the denture and a natural tooth when the patient has the natural tooth) are in close contact with each other is disposed at a position which should be present medically in the oral cavity of the patient in a state where the dental prosthesis is worn in the oral cavity of the individual patient as a wearer.

The first feature of the manufacturing method of the present invention is: the basic steps include (a) a standard denture preparation step, (B) a standard denture determination step, (C) a stacking or copying step, and (D) a hardening step.

(A) And a reference denture preparation step of preparing a reference denture to be a reference denture component having a reference denture base component and an artificial tooth.

(B) A reference denture determining step of placing the reference denture at an appropriate position on a virtual occlusion plane assumed to be an occlusion plane placed at a position where the reference denture is to be located medically in the oral cavity of the patient, by (1) inserting a reference denture into the oral cavity of a patient and confirming the contact state between the mucosa in the oral cavity of the patient and the reference denture, or (2) inserting a reference denture into an articulator to which an intra-oral model of a patient is attached, and confirming a contact state between the intra-oral model of the patient and the reference denture, when there is an improper contact in use, by selecting a reference denture having another shape that does not cause the improper contact, or the shape of the reference denture base member in the reference denture is finely adjusted so that contact does not occur, thereby determining the shape of the reference denture to be used.

(C) A stacking or transferring step of stacking a material for forming an uncured denture base for forming the adjustment member on an adhesive surface of the reference denture base member in the reference denture to be used in the reference denture determining step, and then disposing the reference denture having the material for forming a denture base stacked thereon at an appropriate position on the virtual occlusion plane in the oral cavity of the patient or in the articulator, transferring a shape of the adhesive membrane in the oral cavity of the patient or a shape of the model in the oral cavity of the patient to the material for forming a dental prosthesis base, and removing the remaining material for forming an edge.

(D) And a curing step of curing the curable denture base material after the stacking or transferring step.

In addition, a second feature of the manufacturing method of the present invention is: the deposition or transfer step (C) and the curing step (D) each include a plurality of steps, specifically, the respective steps (C1), (C2) and (C3), (D1), (D2) and (D3) shown below.

[ Processes (C1), (C2) and (C3) contained in the above-mentioned (C) deposition or transfer Process ]

(C1) A central stacking or copying step of stacking an uncured material for a denture base in a base central region of the reference denture base member to copy a shape of the patient's oral cavity or the model in the patient's oral cavity.

(C2) And a front stacking or transferring step of stacking an uncured material for a denture base on the base front region of the standard denture base member, transferring the shape of the patient's oral cavity or the model thereof, and extending the molded material from the base edge to form an edge.

(C3) And a posterior stacking or transferring step of stacking an uncured material for a denture base in the posterior region of the base of the standard denture base member, transferring the shape of the patient's oral cavity or the model thereof, and extending the material from the edge of the base to form an edge.

In the production method of the present invention, the curing step (D) includes the following steps (D1), (D2) and (D3), but these steps do not necessarily have to be performed separately as described later, and two or three steps may be performed simultaneously.

[ (D) Processes (D1), (D2) and (D3) included in the curing Process ]

(D1) And curing the curable denture base material after the central stacking or transferring step.

(D2) And curing the curable denture base material after the front stacking or transferring step.

(D3) And curing the curable denture base material after the post-deposition or transfer step.

The third feature of the manufacturing method of the present invention is: the plurality of steps included in the step (C) of depositing or transferring are performed in a plurality of stages in a specific order. That is, after the step (C1) is performed, the step (C2) and the step (C3) are performed. (C2) The front deposition or transfer step (C) and the rear deposition or transfer step (C3) may be performed simultaneously or separately.

In each of the steps (C1) to (C3), when the shape of the patient's oral mucosa or the shape of the patient's oral cavity model is to be transferred, the reference denture having the hardened denture base material accumulated in an uncured state must be placed at an appropriate position on a plane assumed to be the occlusal plane. The first (C1) step includes: the center region of the susceptor has a small radius of curvature of the mucosal surface, which makes it easy to position the susceptor, while the front and rear parts easily move up and down with the part as a fulcrum by applying only a slight force. Therefore, in order to be able to suppress the occurrence of such a backlash and to be disposed at the above-described appropriate position with high accuracy, it is preferable to use the positioning jig 200 as shown in fig. 6 described above.

When an upper denture and a lower denture are manufactured as a set, it is preferable that: the dental prosthesis base material in an uncured state is stacked on the mucosal surface in the center region of the base for either the upper or lower jaw, and after the reference dental prosthesis on which the dental prosthesis base material is stacked is held by the alignment jig 200, the dental prosthesis base material is inserted into the oral cavity of the patient or the articulator, and held at the appropriate position, and the transfer of the step (C1) is performed. From the viewpoint of reproducing the relationship between the upper and lower jaws, it is more preferable that: when the upper dental prosthesis is manufactured first, only the upper dental prosthesis is held and copied by the alignment jig 200, and when the lower dental prosthesis is copied subsequently, the upper dental prosthesis and the lower dental prosthesis are held and copied by the alignment jig 200 at the same time (in a kit). Either one of the upper dental prosthesis and the lower dental prosthesis may be manufactured first.

In addition, since the alignment (holding at an appropriate position) in the step (C2) and/or the step (C3) after the end of the step (C1) is less likely to be shaken and is easier, the alignment of the upper jaw and the lower jaw may be performed without using an alignment jig by a skilled person. In addition, even if it is not a skilled person, by using the alignment jig 200, it is possible to easily perform highly accurate transfer. In this case, the step (C2) and/or the step (C3) may be performed after the reference denture for either the upper jaw or the lower jaw is held, but in order to more reliably perform the copying with high accuracy, it is preferable to perform the step after both the reference dentures are held by the alignment jig 200.

The (D) curing step may be performed after each of the deposition or transfer steps is completed, by performing each of the curing steps (D1) to (D3) corresponding to the deposition or transfer step individually, or may be performed simultaneously after all of the deposition or transfer steps corresponding to the completed deposition or transfer step are completed. For example, when the steps (C2) and (C3) are performed after the steps (C1) and (D1) are completed, the curing step (D2) and the curing step (D3) may be performed simultaneously after the two deposition or transfer steps are completed, or may be performed separately after the deposition or transfer steps are completed. After the end of step (C1), steps (D1) and (C2) and (C3) may be performed without performing step (D1), and then steps (D1), (D2) and (D3) may be performed collectively at once.

In the above-described method for manufacturing a denture according to the present invention, when the material for a denture base is formed in the shape of the adjustment member, the method may further include: the above-mentioned step (C1) is performed for the first time, and then the above-mentioned deposition or transfer steps (C1) to (C3) are repeated a plurality of times.

After the front deposition or transfer step and the rear deposition or transfer step are completed, the method may further include a rinsing (wash) step of adding the uncured material for the curable denture base to the mucosal surface side of the reference denture base and correcting the shape of the mucosal surface side.

For example, the rinsing step is performed by adding a slight amount of the curable denture base material in an uncured state to the surface of the mucosal surface of the reference denture base after the front deposition or transfer step and the rear deposition or transfer step are completed and before the final curing step is performed, or after the curing steps (D1), (D2) and (D3) are completed, and then curing is performed after the shape is slightly corrected so as to obtain a better adaptability.

In the manufacturing method of the present invention, in the above-mentioned (B) reference denture determining step, the reference denture component is disposed at an appropriate position on a plane assumed to be an occlusal plane, and is inserted into the oral cavity of the patient or into an articulator to which the intra-oral model of the patient is attached, and in the (C) stacking or copying step, the reference denture component having a predetermined material for a curable denture base for an adjustment component stacked at a predetermined portion of the reference denture base component is disposed at an appropriate position on a plane assumed to be an occlusal plane in the oral cavity of the patient or in the articulator.

In this case, it is preferable to insert the dental prosthesis into the oral cavity of the patient from the viewpoint that it is not necessary to manufacture the dental prosthesis in the oral cavity of the patient, which requires labor and time for manufacturing the dental prosthesis.

In this case, the articulator is not particularly limited as long as it is a device capable of reproducing various positions of jaw movement or occlusion on the model. For example, as the occluder, there can be used: an Condylar-type articulator reproducing a movement path shown by condyles during jaw movement, a non-adjustable articulator (average value articulator) or an adjustable articulator (full-adjustable articulator, half-adjustable articulator) among the Condylar-type articulators, an Arcon type in which condyles are connected to a mandibular body classified according to a difference in the position of the condyles corresponding to the condyles, a conylar type in which the condyles are connected to a maxillary body, a non-Condylar-type articulator which does not reproduce a movement path shown by the condyles but can be opened and closed up and down, and the like. The model of the patient's oral cavity can be manufactured in accordance with steps 1 and 2 of the customized method.

The above-mentioned (B) reference denture determining step belongs to the above-mentioned preliminary examination, and in the present invention, when the reference denture of the present invention is used as a reference denture component, the frequency of occurrence of the situation that needs to be adjusted by grinding in this step is low (refer to the non-lifting rate described later), and in most cases, the reference denture of the present invention can be used as a reference denture component as it is. Even in the case where adjustment by grinding is required, the grinding amount is extremely small. Therefore, the manufacturing efficiency is greatly improved.

In the manufacturing method of the present invention, as described in the third feature, the mucosal surface in the central region of the susceptor is first adjusted to perform rough positioning. Next, by adapting the adhesive film surfaces of the front portion (base front region) and the rear portion (base rear region) and forming and adapting the edge (base edge) with a small fluctuation width, it is possible to easily perform highly accurate positioning even by a person who does not have a skilled technique. Further, the boundary can be made to be a natural state with respect to the patient's mucous membrane by making the boundary suitable while supplementing (extending) the height of the front flange portion of the reference denture base or the length of the rear portion of the reference denture base with a material for a denture base such as a spacer material.

In the case where the denture manufacturing method of the present invention is a method of manufacturing a denture of the present invention as an upper denture, the upper denture is prepared as an already-prepared reference denture to be a reference denture component in the reference denture preparation step (a), and the lower denture is prepared as an already-prepared reference denture to be a reference denture component in the reference denture preparation step (a).

The above-described step (a) in the denture manufacturing method of the present invention is only a step of preparing a reference denture as a component. Therefore, the steps (B), (C) and (D) will be described in detail below with reference to the drawings, taking as an example a case where an upper dental prosthesis and a lower dental prosthesis are manufactured in a set using the upper dental prosthesis and the lower dental prosthesis respectively corresponding to the complete dental prosthesis (complete dental prosthesis). The production method of the present invention is not limited to such an example.

(B: Standard denture deciding step)

The above-described upper and/or lower standard denture 10A and/or 10B is placed at an appropriate position on a virtual occlusion plane PA (see fig. 7) assumed to be an occlusion plane placed at a medically supposed position in the oral cavity of the patient, and the contact state between the patient oral cavity model 150 and the upper and lower standard dentures 10A and 10B is confirmed using the articulator 100 shown in fig. 5 (hereinafter, confirmation of the contact state using such articulator is also referred to as "lift confirmation").

Fig. 5 shows a state in which the patient oral cavity model 150, specifically, the patient oral cavity model 150 composed of the upper jaw model 151 and the lower jaw model 152 is attached to the articulator 100. When the reference denture 10A for the upper jaw and the reference denture 10B for the lower jaw are inserted into the articulator 100 in a state in which the intra-oral model 150 of the patient is attached as shown in fig. 5, and the contact state of the intra-oral model 150 of the patient with the reference denture 10A for the upper jaw and the reference denture 10B for the lower jaw is confirmed (confirmation of lifting is performed), it is preferable to use the alignment jig 200 as shown in fig. 6.

The alignment jig 200 includes a reference denture holding portion 201 and a shank portion 202 connected to the reference denture holding portion 201. The reference denture holding part 201 is provided with a maxillary denture holding recess 201A for holding the maxillary reference denture 10A and a mandibular denture holding recess 201B for holding the mandibular reference denture 10B. Further, the handle 202 has a certain length, and thus, when the dental technician or the dentist attaches the upper and lower reference dentures 10A and 10B to the articulator 100 from the outside or the outside of the patient's mouth, the operation can be easily performed. Therefore, the operator such as an engineer can easily place the upper dental prosthesis 10A and/or the lower dental prosthesis 10B at an appropriate position on the virtual occlusion plane PA (see fig. 7) using the handle 202. In addition, when the patient is inserted into the oral cavity to confirm the contact state, the positioning jig 200 is preferably used for the same reason.

In the above lifting confirmation, the contact state can be evaluated by the lifting amount (also referred to as a lifting value) of the guide pin 101 of the bite 100: the floating amount of the guide pin 101 of the articulator 100 when the upper and lower reference dentures 10A and 10B are held still by biting each other in the virtual occlusion plane PA (see fig. 5). Specifically, when the floating amount (lift value) is 0 mm or less, it is evaluated that there is no improper contact, and grinding adjustment is not necessary, whereby the work time for grinding can be reduced. On the other hand, when the extracted value exceeds 0 mm, it is evaluated as: there is improper contact, and the larger the value thereof, the larger the grinding adjustment amount based on grinding. Thus, when the lift amount (lift value) of the guide pin 101 is 0 mm or less, the process is passed and the next process is performed. The above-described amount (upward lifting value) is less than 0 mm, and does not indicate that the position of the guide pin 101 is lowered, but indicates that there is a gap between the reference denture and the model. The gap at this time is filled with the adjustment member in a subsequent step.

When the lifting confirmation is performed using the upper dental prosthesis 10A of the present invention and the lower dental prosthesis 10B of the present invention that satisfy the above-described dimensional requirements, the lifting amount of the guide pins 101 is less than 0 mm or may be in a state of being slightly ground.

In the above description, the occlusion device 100 was used to confirm the lifting. However, instead of the upward confirmation using the articulator 100, the upper dental reference denture 10A and the lower dental reference denture 10B may be directly inserted into the oral cavity of the patient and placed at appropriate positions on the virtual occlusion plane PA (see fig. 7), and in this state, the contact state between the mucous membrane in the oral cavity of the patient and the upper dental reference denture 10A and the lower dental reference denture 10B may be confirmed. The confirmation of the contact state also corresponds to (B) the reference denture determining step.

In the reference denture determining step (B), the upper jaw reference denture 10A and the lower jaw reference denture 10B are held by the alignment jig 200 shown in fig. 6. However, the following configuration is also possible: instead of using the alignment jig 200 as described above, the upper and lower dental prostheses 10A and 10B are attached to the articulator 100, or the upper and lower dental prostheses 10A and 10B are attached to the oral cavity of the patient.

In the reference denture determining step (B), when the actual occlusal surface is displaced from the proper position in the confirmation of the contact state as described above, the reference denture may be arranged at the proper position by adjusting the grinding reference denture (the upper jaw reference denture 10A and the lower jaw reference denture 10B), or another reference denture that does not cause the displacement may be selected.

(C: Stacking or copying Process)

In this step, the hardening denture base material in an uncured state for forming the adjustment member is deposited on the mucosa-side surface of the reference denture base member, for example, the upper-jaw reference denture base 20A of the upper-jaw reference denture 10A, of the reference denture to be used in the reference denture determining step (B).

The deposition of the denture base material is usually performed after the upper and lower dental prostheses 10A and 10B are removed from the alignment jig 200, but may be performed in a state of being attached to the alignment jig 200.

The present step includes (C1), (C2), and (C3) as described above, and the contents and the sequence thereof have been described above.

In the deposition or transfer step, the deposited denture base material is formed into the shape of the adjustment member. For example, the upper and lower dental reference dentures 10A and 10B, on which the denture base material is deposited, are mounted again on the alignment jig 200 and are placed at appropriate positions in the articulator 100. Then, the denture base material is pressed against the upper and lower jaw models 151 and 152, and the shape is transferred to the denture base material while the upper and lower jaw models 151 and 152 are engaged with each other. After the transfer, the upper and lower reference dentures 10A and 10B are pushed out from the articulator 100 at a time while keeping the state in which the upper and lower reference dentures 10A and 10B are attached to the alignment jig 200. Thereafter, the remaining material for the denture base is removed from the upper dental standard denture 10A and the lower dental standard denture 10B.

In this case, the configuration may be such that: the upper dental prosthetic appliance 10A and the lower dental prosthetic appliance 10B, on which the denture base material is deposited, are directly pressed against the oral cavity of the patient using the alignment jig 200 without using the articulator 100, thereby transferring the shape of the oral cavity of the patient. These operations may be performed without using the alignment jig 200.

(D: hardening step)

In this step, the denture base material formed in the shape of the adjustment member in the step (C) of depositing or transferring is cured to form the adjustment member, and the adjustment member and the reference denture base member are integrated with each other.

The polymerization curing is appropriately determined according to the type of the polymerization initiator contained in the material for a denture base. For example, in the case of a photopolymerization type using a photopolymerization initiator, the denture base material can be cured by irradiating light such as ultraviolet rays that activate the initiator. In the case of a thermal polymerization type using a thermal polymerization initiator, the denture base material can be cured by heating. In the case of a chemical polymerization type using a chemical polymerization initiator, the denture base material can be cured by leaving it for a predetermined period of time.

Through the above-described steps, the dentures can be manufactured using the upper and lower standard dentures 10A and 10B.

[ examples ] A method for producing a compound

The present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to these examples.

[1. denture according to the present invention and reference denture according to the present invention ]

[ examples 1 to 12 ] and comparative examples 1 to 2]

(1) Manufacture of reference dentures

A polymethyl methacrylate (pmma) resin was injection-molded using a plaster mold manufactured by a lost wax casting method, thereby manufacturing a reference denture base having a surface shape shown in table 1 and a partial sectional shape shown in table 2. Subsequently, artificial teeth are arranged on the respective manufactured reference denture bases, and thereby, an upper jaw reference denture and a lower jaw reference denture of a complete denture type are manufactured.

Note that the symbols OM, P1D1, and the like in table 2 indicate the respective line segments described in (7-1, regarding the preferred planar shape), and the numerical value in each symbol column indicates the relative length of the line segment of the symbol (the length when the length of the line segment PQ or the line segment PQ is 1). LA1 to LA4 and LB1 to LB4 in table 3 are defined according to the definitions in (7-5 and 7-6 are preferable three-dimensional shapes of the maxillary reference denture and the mandibular reference denture according to the present invention). The thickness is the minimum thickness of the base palatal base 20a3 of the standard denture for the upper jaw.

[ Table 1]

[ Table 2]

As described later, the dentures manufactured using the reference dentures of comparative examples 1 to 2 do not belong to the dentures of the present invention.

(2) Manufacture of dentures

(2-1) preparation of an intraoral model of a patient

20 types (20 groups) of "oral cavity models of patients each composed of a combination of an upper jaw model and a lower jaw model of an edentulous jaw" having different shapes from each other were prepared. Table 3 shows the state of the shape deviation of each of the oral cavity models of the patients for the upper jaw and the oral cavity models of the patients for the lower jaw with respect to the oral cavity models of the 20 patients (group).

[ Table 3]

The state of the deviation shown in table 3 is the minimum value of the measured front tooth space top height and molar tooth space top height for each patient oral cavity model, and the line PQ (in the case of the maxillary model) or the line PQ (in the case of the mandibular model) described in [7-1 ] regarding the preferred planar shape: min (mm), maximum value max (mm), and standard deviation. Here, the gullet top height is a vertical distance from the gullet top to the occlusal plane. In the maxillofacial model, the alveolar ceiling height of one third of the anterior part of the part trisected from the "most anterior part of the incisal papilla" to the "intersection point between the line connecting the left-side winged-process maxillary incisal track and the right-side winged-process maxillary incisal track and the median palate" was defined as the incisor alveolar ceiling height, and the posterior alveolar ceiling height was defined as the molar alveolar ceiling height. In the mandibular model, the molar tooth space height in the front third of the portion trisected from the "center portion of the molar tooth space top" to the "intersection point between the line connecting the front edge of the left side posterior molar pad and the front edge of the right side posterior molar pad and the center line" was defined as the incisor tooth space height, and the molar tooth space height was defined as the posterior third of the molar tooth space height.

(2-2) production of dentures

Using the reference dentures of the examples and comparative examples listed in tables 1 and 2, 20 sets of dentures suitable for the oral cavity models of the 20 sets of patients were manufactured in each example. Specifically, an articulator shown in fig. 5 was prepared as an articulator, an alignment jig shown in fig. 6 was prepared as an alignment jig, and 20 types (20 groups) "of intra-oral models of patients composed of a combination of an upper jaw model and a lower jaw model of an edentulous jaw", which are shown in table 3 and have mutually different shapes, were prepared as the intra-oral models of patients. Next, 1 of the 20 groups of patient oral cavity models was set in the articulator, and a denture suitable for the patient oral cavity model was produced as follows.

That is, since the reference denture to be used is already prepared, the reference denture for the upper jaw is held by the aligning jig, and the presence or absence of improper contact is checked, and when improper contact is found (when it is determined that improper contact is caused), grinding adjustment is performed by the portable grinding machine until improper contact is not caused (until the contact becomes proper) (B reference denture determining step). Then, the reference denture determining step (B) was similarly performed for the lower jaw. Next, the uncured material for the denture base is stacked on the mucosal surface in the center area of the base of the standard denture for upper jaw, and only the standard denture for upper jaw obtained by the stacking is held by the alignment jig, inserted into the articulator, and held in the proper position, and the transfer in the step (C1) is performed. Thereafter, the dental prosthesis for the lower jaw is also transferred by the process (C1) in which the dental prosthesis base material in an uncured state is deposited on the mucosal surface in the central region of the base, the resulting lower jaw reference prosthesis and the transferred upper jaw reference prosthesis are held together (in a kit) by the alignment jig, and then inserted into the articulator and held in the proper position. After the replication in the step (C1) was performed in this manner, the step (D1) was not performed, and (C2) and (C3) were performed. At this time, (C2) and (C3) insert the maxillary and mandibular instruments into the articulator, respectively, using alignment jigs, and copy and edge formation are performed while keeping the maxillary and mandibular instruments in the appropriate positions. After the rinsing step, all the materials for the denture base (photo-setting spacer material: TOKUSO LITE-REBASE, manufactured by deltoid corporation) were once hardened as a final step (D), and a set of dentures of upper and lower jaws was manufactured. Further, such operations are repeated for the other patient oral cavity models, and finally 20 sets of dentures for the upper jaw or the lower jaw suitable for all of the patient oral cavity models of 20 sets are manufactured by the manufacturing method of the present invention.

In examples 1 to 12, the denture of the present invention was produced in which the front end region on the base edge side of all the regions of the base edge in the front region was constituted by the front adjustment member, and the front end region on the base edge side of all the regions of the base edge in the rear region was constituted by the rear adjustment member. In contrast, in comparative examples 1 to 2, although the denture was produced by the production method of the present invention, in the reference denture determining step (B), "improper contact" was confirmed in the vicinity of the base edge in the front region of the base, and therefore, the denture was produced after grinding adjustment was performed, and as a result, the base edge in the front region of the produced denture was constituted by the reference denture and the front adjusting member was not exposed on the grinding surface of the front flange portion. Therefore, the dentures produced in comparative examples 1 to 2 do not belong to the dentures of the present invention, and therefore the reference dentures of comparative examples 1 to 2 do not belong to the reference dentures of the present invention.

(3) Reference denture and evaluation of denture

In the denture production process, the fitting (non-lifting rate and fitting rate), production time, and adjustment time of the intra-oral model of the patient to the standard denture to be used were evaluated, and the proportion of the front adjustment member (hereinafter, also simply referred to as height adjustment margin rate) in the polishing surface of the canine front flange portion of the obtained denture was evaluated.

Hereinafter, each evaluation item will be described.

[ evaluation on non-lifting percentage ]

The non-extraction rate is an index representing the following: in the reference denture determining step (B) of the denture manufacturing method of the present invention, since there is a portion that makes improper contact with mucous membranes or the like, which may cause pain or the like to the patient, it is determined that the condition requiring adjustment by grinding is "a low level of occurrence frequency". In the present examples (examples 1 to 12) and comparative examples (comparative examples 1 and 2), as a practical test method (as a method not requiring assistance of a large number of patients), when the (B) standard denture determination process (evaluation based on lifting value measurement) using a articulator was performed on 20 types (20 groups) of "patient oral cavity models composed of a combination of an upper jaw model and a lower jaw model" having mutually different shapes, which are considered to reflect patient diversity, was performed, the occurrence rate of cases that became qualified was regarded as the non-lifting rate.

The non-lifting percentage may be an evaluation index reflecting a general degree indicating how many patients can be applied to a set (combination) of a set of an upper dental reference denture and a lower dental reference denture to be evaluated (in other words, an index evaluating the extent of the applicable range for each patient). The higher the value of the non-extraction rate, the higher the versatility (the wide adaptable range for various patients), and the higher the value is judged to be 80% or more, more preferably 90% or more, and most preferably 100%.

Evaluation based on the above-described lifting value measurement was performed in the following manner. That is, first, 1 set of an oral cavity model 150 of a patient, which is composed of an upper jaw model 151 and a lower jaw model 152 of an edentulous jaw, arbitrarily selected from 20 types (20 sets) different in shape from each other, is installed in the articulator 100 as shown in fig. 5. Then, the upper and lower jaw reference dentures are held by the alignment jig 200 shown in fig. 6 so as to be in an appropriate biting state. Next, the finger is inserted into the articulator 100 while maintaining the biting state, the floating amount (lift value) of the guide pins 101 when the finger is arranged to bite into the occlusal plane PA is measured, and the measured lift value is 0 mm or less as pass, and the pass/fail is evaluated. After the evaluation of the patient oral cavity model 150 in the group 1 was completed, the patient oral cavity model 150 held by the alignment jig 200 was replaced with any 1 group selected from the remaining 19 groups, and the acceptability was evaluated in the same manner, and the evaluation was repeated further, and finally, the acceptability was evaluated for all the groups (20 groups), and the non-extraction rate was obtained from the result.

< evaluation on suitability >

The suitability ratio is an index indicating the following: when the suitability is determined by determining whether or not the reference denture having the denture base material deposited in the deposition or transfer step (C) of the denture manufacturing method of the present invention can be placed at an appropriate position in the articulator 100 to which the intra-oral model 150 of the patient is attached, the occurrence frequency of cases determined to be suitable is high.

In the present example (examples 1 to 12), it was examined whether or not the model can be placed at an appropriate position (on the occlusal plane PA) using 20 (20 groups) of intra-oral models 150 of patients having different shapes, as in the measurement of the non-extraction rate. In order to reduce the influence of the three-dimensional shape and observe the influence of the planar shape, the reference denture for the upper jaw and the reference denture for the lower jaw are not evaluated in a bite state, but are evaluated separately. Specifically, an upper dental prosthesis (or a lower dental prosthesis) in which a material for a denture base is stacked on an upper dental model 151 (or a lower dental model 152) attached to the articulator 100 is inserted individually into the articulator 100 to which an intra-oral model 150 of a patient, which is composed of the upper dental model 151 and the lower dental model 152, is attached, using an alignment jig 200 as shown in fig. 6, and it is determined whether or not the dental prosthesis can be placed at an appropriate position. Such an operation is performed for the 20 types of patient oral cavity models 150, and the ratio of the number of models that can be arranged is set as the fitting rate.

< manufacturing time: with respect to t_pEvaluation of (1) >

The production time was determined as follows. That is, first, as a reference example, dentures suitable for the above-mentioned 20 kinds (20 groups) of the above-mentioned patient oral cavity models 150 having mutually different shapes were manufactured by a customized method, and the time required for manufacturing each denture was measuredTime (min). The average time (minutes) required for producing a denture was determined from the measured values and was taken as t_p-c_ust. Then, dentures suitable for the oral cavity model 150 of the patient were produced using 20 types (20 groups) of the standard dentures for the upper jaw and the standard dentures for the lower jaw in each of the examples and comparative examples, and the average (minute) of the time required for producing one denture was determined for each of the examples and comparative examples in the same manner as t_p-Exp. In addition, t is obtained_p-ExpWith t_p-c_ustNormalized percentage: (t)_p-Exp/t_p-c_ust) X 100 (%) and the manufacturing time was evaluated using this value. The lower the value, the shorter the denture manufacturing time compared to the customized method.

In the manufacturing method of the present invention according to the embodiment, the steps (B) and (C) are performed by being inserted into an intra-oral cavity model of a patient. Therefore, the time required for the manufacture of the model in the patient's oral cavity (corresponding to step 1 of the customization method [ taking an impression of the patient's oral cavity using an impression material ]]And step 2[ manufacture of plaster mold Using the impression]Required time) from t) above, respectively_p-c_ustAnd t_p-ExpIs subtracted. In the manufacturing method of the present invention, when the steps (B) and (C) are directly inserted into the oral cavity of the patient, the time required for manufacturing the model in the oral cavity of the patient is not required, and therefore t can be shortened correspondingly to this time_p-ExpIn this case, the effect of the present invention is more remarkable.

In order to eliminate the influence of the difference in the planar shape of the reference denture and to confirm the effect of the difference in the three-dimensional shape, the manufacturing time should be compared between reference denture teeth having the same planar shape (for example, examples 1 to 10 and comparative example 2).

< adjustment time: with respect to t_AEvaluation of (1) >

The adjustment time is obtained as follows. That is, the following average time is taken as the adjustment time: when the dentures suitable for the intra-oral model 150 of the 20 types (20 groups) of patients having different shapes from each other are manufactured using the upper and lower jaw reference dentures, the average time required until the decision in the reference denture decision step (B) is judged to be suitable (when the decision is not suitable, grinding adjustment is performed, and the reference denture decision step is performed again until the decision becomes suitable is repeated).

In the evaluation of the adjustment time, the adjustment time (minutes) in comparative example 1 was set as the reference time t_A-SThe adjustment time (minutes) in each of examples and comparative example 2 was taken as t_A-Exp. Then, using t_A-ExpAt the above standard time t_A-SNormalized percentage: (t)_A-Exp/t_A-S) X 100 (%) was evaluated. The lower the value of the adjustment time, the shorter the denture production time is compared to comparative example 1.

In addition, in order to eliminate the influence of the difference in the planar shape of the reference denture and to confirm the effect of the difference in the three-dimensional shape, the adjustment time must be compared between reference denture teeth having the same planar shape (for example, examples 1 to 10 and comparative example 2). Further, even in the case of the reference denture having the same planar shape, the adjustment time is affected by the difference in the three-dimensional shape, and the influence of the adjustment time is reflected in the manufacturing time.

< evaluation of height adjustment margin Rate >

The height adjustment margin rate is an index indicating the following: when the dentures suitable for the above-mentioned 20 (20 groups) patient intra-oral cavity models 150 having different shapes from each other were manufactured using the upper and lower jaw reference dentures, there was no portion that makes an improper contact with mucous membranes or the like, which causes pain or the like to the patient, and there was no adjustment margin for adding an adjustment member. In the present embodiment and the comparative example, the ratio of the height of the adjustment member to the height of the canine front flange portion of the reference denture was taken as the height adjustment allowance rate.

In the evaluation of the height adjustment allowance rate, the height ([ mm ]) from the tooth neck portion to the base edge of the denture was set as the reference height h_sFrom the edge of the base of the reference denture to the edge of the base of the dentureHeight h with height difference (mm) as adjusting component_Adj. Then, the height h of the component is adjusted_AdjBased on the above reference height h_sNormalized percentage: (h)_Adj/h_s) X 100 (%) was evaluated. The smaller the height adjustment margin ratio, the smaller the adjustment margin, and when it is 0%, the height is adjusted by cutting the reference denture.

The obtained evaluation results are shown in table 4.

[ Table 4]

As shown in table 4, in examples 1 to 12, the reference dentures having the shapes shown in table 1 and table 2 were produced, and the fitting rate, the non-lifting rate, the production time, the adjustment time, and the height adjustment rate were evaluated. The evaluation results are shown in table 4, and are good results.

On the other hand, in comparative example 1 in which the dentures manufactured by the customized method so as to be suitable for 1 patient oral cavity internal model randomly selected from the above-mentioned 20 groups were used as the reference dentures, and the dentures of 20 persons were manufactured, unlike the example, no adjustment margin was provided, and therefore, in the patient oral cavity internal model of 19 groups, improper contact could not be avoided, and the reference dentures having a large height and thickness were required to be cut so as to be suitable for the oral cavity internal model, and the height adjustment margin rate was 0%, and both the adjustment time and the manufacturing time became long.

In addition, the plan shape was the same as that of example 1, but in comparative example 2 in which a denture was manufactured using a reference denture having a large height and thickness, almost no adjustment margin was provided, and the denture was in contact with the intra-oral model of the patient. Therefore, it is necessary to cut a reference denture having a large height and thickness so as to fit the inside of the oral cavity, and the height adjustment allowance rate is 0%, and both the adjustment time and the manufacturing time become long as compared with example 1.

In addition, the reference examples show: the manufacturing time when the denture was manufactured by the customized method is adapted to 1 patient group intra-oral model randomly selected from the 2020 patient group intra-oral models.

[ 2] production method of the present invention ]

[ examples 1 to 12 ]

Examples 1 to 12 described above are examples of producing a denture by the production method of the present invention, and after the step (C) of stacking or copying was divided into a plurality of stages and the step (C1) was copied, the steps (D1) were not performed and (C2) and (C3) were performed. In (C2) and (C3), the maxillary and mandibular materials, on which the dental denture base material was deposited in an uncured state, were inserted into the articulator using an alignment jig, and the dental denture base material was transferred and edged while being held at the above appropriate positions. At this time, without failure, copying and edge formation can be performed at an appropriate position at a time.

[ COMPARATIVE EXAMPLE 3]

In this comparative example, the deposition or transfer step (C) was performed in one stage, and the case was confirmed. Specifically, the same standard denture as in example 1 was used, and the dental denture base material in an uncured state was stacked on the mucosal surfaces of the center base region, the front base region, and the rear base region of the standard denture for the upper jaw. After all of the upper jaw reference dentures on which the denture base material was deposited were held by the positioning jig, they were inserted into the articulator, and the dental film surface was pressed against the dental film surface of the intraoral model of the upper jaw patient, and the dental prosthesis was transferred in the same manner. In this case, the edge formation is performed in a state where the position is not specified. Therefore, the dental prosthesis base material deposited in the rear region of the base during insertion is likely to be displaced from the proper position, and the dental prosthesis base material is deformed by contact with the model, or the extruded dental prosthesis base material moves inward when pressed slightly obliquely, and the remaining dental prosthesis base material does not smoothly overflow from the edge of the reference dental prosthesis base, and thus, satisfactory transfer cannot be performed at one time. In order to finally enable sufficient replication and edge formation, the following operations need to be repeated a plurality of times before edge formation is performed: after the first copying, the dental prosthesis is removed from the articulator, and a small amount of the remaining material for the denture base is removed, or the material for the denture base is added locally, and then the dental prosthesis is inserted again to perform the next copying. Therefore, the manufacturing time becomes long as compared with example 1.

(symbol description)

1 … false tooth

1A … dental prosthesis for upper jaw

1B … false tooth for mandible

1A4, 1B4 … mucosal surfaces

1A5, 1B5 … abrasive surface

1A6, 1B6 … base edge

1A7, 1B7 … tooth neck

1A8, 1B8 … flange

2 … denture base

2A … denture base for upper jaw

2B … denture base for upper jaw

2A1, 2B1 … Central region

2A2, 2B2 … front zone (front flange part)

2A3 … posterior region (palatal base support)

2B3 … rear region (tongue side margin)

4 … reference denture base member

4A … base for standard denture for upper jaw

4B … reference denture component for mandible

5 … reference denture component

5A … reference denture component for upper jaw

5B … reference denture component for mandible

6 … adjustment component

6A1, 6B1 … Central adjusting Member

6A2, 6B2 … front adjustment member

6A3 … rear adjusting part (adjusting part of palatal base)

6B3 … rear adjusting part (tongue side flange adjusting part)

10 … reference denture (of the invention) (corresponding to the reference denture component)

10A … (of the invention) Standard denture for Upper jaw (corresponding to the Standard denture component for Upper jaw)

10B … (of the invention) Standard denture for lower jaw (corresponding to the Standard denture part for lower jaw)

20 … reference denture base (corresponding to the reference denture base component)

20A … Standard denture base for Upper jaw (corresponding to Standard denture base for Upper jaw)

20B … Standard denture base for mandible (corresponding to the Standard denture base for mandible)

20A1, 20B1 … base center region

20A2, 20B2 … base front region (base front flange part)

20A3 … base posterior region (base palatal base)

Mucosal surface of base palatal support 20A3a …

20B3 … base rear region (base tongue side edge)

20B3a … base support tab side margin mucosal surface

21A, 21B … flange

21B2 … lingual flange

22A, 22B … susceptor edge

22A1, 22B1 … labial base edge

22A2, 22B2 … cheek side base edges

23A, 23B … mucosal surfaces

24A, 24B … abrasive surface

30. 30A, 30B … Artificial dentition

31. 31A, 31B … artificial tooth

31A1, 31B1 … artificial middle incisor

31A3, 31B3 … Artificial canine teeth (Artificial teeth of canine teeth)

31A3p, 31B3p … cusp of artificial dog tooth

31A6, 31B6 … Artificial first molar teeth

31A6p, 31B6p … proximal buccal pinnacle of an artificial first molar

31A7, 31B7 … Artificial second Large molar teeth

PA … virtual occlusal plane

Center of mesial angle of left and right central incisors of a1 … mandibular reference denture

Distal buccal apex of left second molar of a2 … mandibular reference denture

Distal buccal cusp of the second right molar of a reference denture for the mandible A3 …

Height of peak of palatal support of HA … matrix

Height of front end of HB … base tongue side edge part on base edge side

Height difference between front end of base edge side of base front area in vertical section of LA1, LB1 … artificial dog tooth and cusp of artificial dog tooth

Height difference between the highest point of base palatal support part and the sharp top of artificial canine tooth in LA2 … artificial canine tooth vertical section

Height difference between base support edge side front end of base support tongue side edge part and cusp of artificial dog tooth in LB2 … artificial dog tooth vertical section

Difference in height between base edge side front end of base front region in vertical section of LA3, LB3 … artificial first large molar and mesial buccal pinnacle of artificial first large molar

Difference in elevation between the apex of the base palatal support in the vertical cross-section of the LA4 … artificial first molar tooth and the mesial buccal apex of the artificial first molar tooth

Difference in height between the front end on the base edge side of the base tongue side edge part in the vertical cross section of the LB4 … artificial first large molar and the mesial buccal pointed tip of the artificial first large molar

100 … occluder

101 … guide pin

150 … model of patient's oral cavity

151 … maxillary model

152 … mandible model

200 … alignment clamp

201 … reference denture retainer

201A … maxillary denture retaining recess

201B … mandibular denture retaining recess

202 … handle