阅读说明：本技术 无水泥型牙科用种植牙 (Cement-free dental implant ) 是由 金洙弘 孙成奎 于 2020-10-28 设计创作，主要内容包括：本发明涉及一种即使不使用牙科用水泥也能够将牙冠牢固地结合到基台的无水泥型牙科用种植牙。作为一个实施例提出的无水泥型牙科用种植牙包括：基台,其在上侧周缘隔开形成有竖直切缝,并在竖直切缝之间形成有沿径向提供弹性的弹性结合突起,且在中央形成有螺钉插入孔；牙冠帽,其在内部下侧形成有供基台的上侧插入的结合部,并在内部上侧形成有螺钉孔,且在内部中央向径向外侧凹入形成有供基台的弹性结合突起结合的结合短坎,并在外部一体地形成有牙冠；以及基台螺钉,其插入并连结于基台的螺钉插入孔,且在上端具备突起加压部,该突起加压部在连结时将基台的弹性结合突起向径向外侧推挤而使基台的弹性结合突起结合到牙冠帽的结合短坎内。(The present invention relates to a cement-free dental implant capable of firmly bonding a crown to an abutment without using dental cement. A cement-free dental implant proposed as an example includes: a base platform, which is formed with vertical slits on the upper side periphery at intervals, and formed with elastic combination protrusions between the vertical slits for providing elasticity along the radial direction, and formed with a screw insertion hole at the center; a crown cap having a coupling part formed at an inner lower side thereof, into which an upper side of the abutment is inserted, a screw hole formed at an inner upper side thereof, a coupling ridge formed at an inner center thereof to be radially outwardly recessed, and a crown integrally formed at an outer portion thereof; and an abutment screw inserted into and coupled to the screw insertion hole of the abutment and having a protrusion pressing portion at an upper end thereof, the protrusion pressing portion pushing the elastic coupling protrusion of the abutment radially outward at the time of coupling so that the elastic coupling protrusion of the abutment is coupled into the coupling ridge of the crown cap.)

1. A cement-free dental implant, comprising:

a base platform, which is formed with vertical slits on the upper side periphery in a spaced manner, and is formed with an elastic combination projection providing elasticity along the radial direction between the vertical slits, and is formed with a screw insertion hole at the center;

a crown cap having a coupling portion formed at an inner lower side thereof, into which an upper side of the abutment is inserted, a screw hole formed at an inner upper side thereof, a coupling ridge formed at an inner center thereof to be coupled to the elastic coupling protrusion of the abutment and recessed radially outward, and a crown integrally formed at an outer portion thereof; and

and a base screw inserted into and firmly coupled to the screw insertion hole of the base, and having a protrusion pressing portion provided at an upper end thereof, the protrusion pressing portion pushing the elastic coupling protrusion of the base radially outward at the time of coupling so that the elastic coupling protrusion of the base is coupled to the coupling ridge of the crown cap.

2. The cement-free dental implant according to claim 1, wherein the cement-free dental implant is a dental implant,

the abutment is formed as a connection bolt integrated abutment integrally provided on the lower side with a connection bolt portion firmly connected to a fixture fitted and fixed to an alveolar bone.

3. The cement-free dental implant according to claim 1, wherein the cement-free dental implant is a dental implant,

the abutment is formed as a general abutment inserted into a fixture fitted and fixed to an alveolar bone at a lower side, and the abutment is fixed to the fixture by pressing by passing the abutment screw through the screw hole and firmly coupling the lower end side of the abutment screw to the fixture.

4. The cement-free dental implant according to claim 1, wherein the cement-free dental implant is a dental implant,

the above-mentioned base station includes: an abutment body integrally provided at a lower side thereof with a coupling bolt portion firmly coupled to a fixture inserted into and fixed to an alveolar bone, and having a polygonal coupling protrusion protruded at an upper side thereof; and a ring-shaped base cap having a polygonal coupling groove formed at a lower side thereof into which the polygonal coupling protrusion is inserted, and having the elastic coupling protrusion formed at an upper end periphery thereof.

5. The cement-free dental implant according to any one of claims 1 to 4,

a rotation prevention cut-out portion for preventing the crown cap from rotating arbitrarily is formed on the upper outer peripheral surface side of the abutment.

6. The cement-free dental implant according to any one of claims 1 to 4,

the screw hole of the crown cap is formed in a vertical direction or obliquely.

7. The cement-free dental implant according to any one of claims 1 to 4,

the protruding pressing portion of the base screw has a reverse truncated cone shape in which the cross section increases as the top portion is closer to the base screw.

Technical Field

The disclosure relates to a dental implant which is fixed in an alveolar bone to fill a missing tooth.

Background

Unless otherwise indicated herein, what is described in this identification item does not constitute prior art to the claims in this application and is not admitted to be prior art by recitation of this identification item.

Generally, teeth are the body tissue responsible for the chewing function that finely chews or grinds food to aid digestion. Such teeth, when lost due to tooth extraction or the like due to tooth decay, for example, have a problem in chewing function, and are not normally chewed and poorly digested, and therefore, not only can food be taken as desired, but also it is difficult to smoothly take in nutrients. For this reason, teeth have been recognized as an important part of the body since ancient times, and play an important role in a healthy life.

Generally, teeth of a human include 16 upper and 16 lower jaws having 32 teeth, and the deciduous teeth generated in a toddler stage are replaced with permanent teeth in a childhood stage, and then oral activities are performed using the permanent teeth for a lifetime.

Since a human tooth does not grow new tooth even if it is lost after being replaced with a permanent tooth in a childhood, the lost tooth or its surrounding tissue is restored by performing a dental filling treatment in a dentistry.

For example, in the case of a general dental filling such as a bridge, a partial denture, a denture, etc., there is a problem of causing inconvenience due to a foreign body sensation, etc. For this reason, recently, a dental implant (dental implant) has been spotlighted, which can restore almost the same all functions and appearances as a natural tooth without damaging surrounding teeth or tissues when the tooth is defective.

A dental implant is generally composed of a fixture (fixture) fixed to an alveolar bone, an abutment (abutment) coupled to the fixture, and a crown (crown) integrally coupled to the abutment. The anchor corresponds to an artificial tooth root embedded and fixed in an alveolar bone, the abutment functions to connect the anchor and the crown, and the crown corresponds to an artificial tooth that reproduces the same form and function as a natural tooth.

The dental implant may be formed such that the fixture is separated from the abutment, and may further include a dental implant fixture in which the fixture and the abutment are integrally formed. In addition, in the dental implant, the coupling bolt for firmly coupling and fixing the abutment to the fixture may be formed integrally with the abutment, or may be formed separately from the abutment.

In the case of the dental implant as described above, a dental cement (dental cement) is applied to integrally join the crown to the abutment.

As an example of such dental implant, korean patent laid-open publication No. 10-2004-0034874 (published 2004/04/29) discloses an abutment for dental crown implant, which includes: an artificial tooth fixing body, which is provided with a hexagonal head part protruding from the upper end and a firm connecting hole formed in the center of the upper end; a lower installation frame which is combined with the upper end of the hexagonal head of the artificial teeth fixing body, is provided with an insertion hole at the center in a communication way, and is provided with a hexagonal groove part combined with the hexagonal head of the artificial teeth fixing body at the lower part; and an upper installation frame which is installed on the upper part of the lower installation frame and is provided with a screw thread part at the lower part, and artificial teeth which are bonded by dental cement are arranged at the periphery of the upper part which is combined with the lower installation frame and the upper installation frame.

Further, korean patent laid-open publication No. 10-2009-0048078 (published on 23.2009) discloses a dental implant, which is characterized by comprising: a fixture fixed to an alveolar bone; a base extending to an upper portion of the holder; an artificial tooth which is embedded in the abutment; and a silver-containing dental cement interposed between the abutment and the artificial tooth to bond the abutment and the artificial tooth.

However, in the case of the dental implant as described above, since the dental cement must be interposed between the abutment and the crown, it is difficult to completely remove the dental cement, and there is a problem that the periphery is inflamed.

Disclosure of Invention

(problems to be solved by the invention)

The present invention provides a cement-free (cementless) type dental implant capable of firmly bonding a crown to a base without using dental cement.

It is to be understood that the present invention is not limited to the above-described technical problems, and other technical problems can be derived from the following description.

(measures taken to solve the problems)

The disclosure proposes as one embodiment a cement-free dental implant, comprising: a base platform, which is provided with vertical slits on the upper side periphery at intervals, is provided with an elastic combination protrusion providing elasticity to the radial direction between the vertical slits, and is provided with a screw insertion hole at the center; a crown cap having a coupling portion formed at an inner lower side thereof, into which an upper side of the abutment is inserted, a screw hole formed at an inner upper side thereof, a coupling ridge formed at an inner center thereof to be coupled to the elastic coupling protrusion of the abutment and recessed radially outward, and a crown integrally formed at an outer portion thereof; and a base screw inserted into and firmly coupled to the screw insertion hole of the base, and including a protrusion pressing portion at an upper end thereof, the protrusion pressing portion pushing the elastic coupling protrusion of the base radially outward at the time of coupling so that the elastic coupling protrusion of the base is coupled into the coupling ridge of the crown cap.

In addition, according to a preferred feature of the present disclosure, the projection pressing portion of the base screw has a reverse truncated cone shape in which a cross section gradually increases as it approaches the upper portion.

(Effect of the invention)

The cement-free dental implant according to the present disclosure has a structure in which the elastic coupling projection of the abutment is expanded radially outward by the projection pressing portion of the abutment screw and is coupled to the coupling stub of the crown cap when the abutment screw is firmly coupled, and thus the crown can be firmly coupled to the abutment without using dental cement, which is advantageous in that inflammation caused by the dental cement can be eliminated.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood from the description of the claims by those skilled in the art.

Drawings

Fig. 1 is a perspective view of a cement-free dental implant according to one embodiment of the disclosure.

Fig. 2-4 are exploded perspective views of various embodiments of a cementless dental implant according to one embodiment of the disclosure.

Fig. 5-7 are operational views of various embodiments of a cementless dental implant according to one embodiment of the disclosure.

Detailed Description

Hereinafter, the constitution and the operation effect of the preferred embodiment will be observed with reference to the drawings. For reference, in the following drawings, each constituent element is omitted or schematically shown for convenience and clarity, and the size of each constituent element does not reflect the actual size. In addition, throughout the specification, the same reference numerals refer to the same constituent elements, and the reference numerals for the same constituent elements are omitted in individual drawings.

Fig. 1 is a perspective view of a cement-free dental implant according to an embodiment of the disclosure, and fig. 2 to 4 are exploded perspective views of various embodiments of a cement-free dental implant according to an embodiment of the disclosure.

As shown in fig. 1 to 4, a cement-free dental implant according to one embodiment of the disclosure includes: a base platform 10, 10', 10 ″ which is formed with vertical slits 11 at an upper side periphery at intervals, and is formed with an elastic coupling protrusion 13 providing elasticity in a radial direction between the vertical slits 11, and is formed with a screw insertion hole 15 at a center; a crown cap 20 having a coupling portion 21 formed at an inner lower side thereof, into which an upper side of the abutment 10, 10 ', 10 "is inserted, a screw hole 23 formed at an inner upper side thereof, a coupling ridge 25 formed at an inner center thereof to be radially outwardly recessed, and to which the elastic coupling protrusion 13 of the abutment 10, 10', 10" is coupled, and a crown 27 integrally formed at an outer side thereof; and an abutment screw 30 inserted into and firmly coupled to the screw insertion hole 15 of the abutment 10, 10 ', 10 ", and having a protrusion pressing portion 31 at an upper end, the protrusion pressing portion 31 pressing the elastic coupling protrusion 13 of the abutment 10, 10 ', 10" radially outward at the time of firm coupling so that the elastic coupling protrusion 13 of the abutment 10, 10 ', 10 "is coupled into the coupling ridge 25 of the crown cap 20.

Here, the abutment 10, 10', 10 ″ corresponds to a connection bracket for connecting and fixing a crown 27 corresponding to an artificial tooth to the fixture 3 fitted and fixed to an alveolar bone.

Vertical slits 11 are formed at intervals on the upper periphery of the base 10, 10', 10 ". The vertical slits 11 are formed by vertically cutting the upper side circumference of the base 10, 10', 10 ″ so that elasticity can be radially imparted to the elastic coupling protrusions 13, which will be described below. The vertical slits 11 can be formed at regular intervals along the upper peripheral edge of the base 10, 10', 10 ″ at 180 degrees, 120 degrees, 60 degrees, and 60 degrees. In addition, it is preferable that the lower ends of the vertical slits 11 are rounded.

An elastic coupling protrusion 13 for providing elasticity in a radial direction is formed between the vertical slits 11. The elastic coupling protrusion 13 is pushed by the protrusion pressing part 31 of the abutment screw 30 to be expanded outward in the radial direction and coupled with the coupling step 25 of the crown cap 20 to be described below when the abutment screw 30 to be described below is firmly coupled, so that the crown cap 20 including the crown 27 and the abutments 10, 10', 10 ″ can be firmly coupled without using dental cement.

In the case of the elastic coupling projection 13 formed by the vertical slits 11 partitioning the upper side periphery of the base 10, 10', 10 ″, the lower side portion is formed relatively thinly due to the annular groove 13a so as to be easily opened radially outward, and the upper side portion has a shape gradually expanding radially outward toward the upper side.

A screw insertion hole 15 is formed in the center of the base 10, 10'. The screw insertion hole 15 is formed to allow a base screw 30 described below to be inserted and firmly coupled and fixed, or to allow the base screw 30 to be firmly coupled and fixed to the anchor 3, and in the former case, is formed as a threaded hole having a closed lower end, and in the latter case, is formed as a through hole having a larger diameter than the main body of the base screw 30 and smaller than the inner diameter of the projection pressing portion 31 of the base screw 30.

As shown in fig. 1 and 2, the abutment 10 may be formed as an integral abutment of a connecting bolt provided on the lower side and integrally with a connecting bolt portion 10a firmly connected to the fixture 3 fitted and fixed to the alveolar bone, and in this case, the screw insertion hole 15 may be formed as a screw hole having a closed lower end.

In addition, as shown in fig. 3, according to the embodiment, the abutment 10' may also be formed as a general abutment which is inserted into the fixture 3 embedded and fixed in the alveolar bone at the lower side, and in this case, the screw insertion hole 15 is formed as a through hole having a larger diameter than the main body of the abutment screw 30 and smaller than the inner diameter of the protrusion pressing part 31 of the abutment screw 30.

In addition, as shown in fig. 4, according to the embodiment, the base station 10 ″ may further include: an abutment body 10a ' integrally provided at a lower side thereof with a connection bolt part 10a ' -1 firmly connected to a fixture 3 inserted and fixed into an alveolar bone, and having a polygonal connection protrusion 10a ' -2 formed at an upper side thereof; and an annular base cap 10b ' formed at a lower side with a polygonal coupling groove 10b ' -1 into which the polygonal coupling protrusion 10a ' -2 is inserted, and formed at an upper end periphery with an elastic coupling protrusion 13. In this case, the screw insertion hole 15 is formed as a screw hole whose lower end is closed.

Although not shown, the abutment may be in the form of a dental implant fixture in which the fixture and the abutment are integrally formed.

In addition, a rotation preventing cut 17 for preventing a crown cap 20, which will be described below, from being arbitrarily rotated is formed on the upper outer circumferential surface side of the abutment 10, 10', 10 ″. Although not shown, the upper outer circumferential surface of the abutment 10, 10 ', 10 "may be formed in a polygonal shape to prevent the crown cap 20 from being arbitrarily rotated, and a rotation preventing protrusion may be formed to protrude from the upper outer circumferential surface of the abutment 10, 10', 10".

A crown cap 20 is coupled to an upper side of the abutment 10, 10', 10 ″. The crown cap 20 functions to form a kind of coupling cap so that a crown 27 forming an artificial tooth is coupled and fixed to the abutment 10, 10', 10 ", and the crown 27 is integrally formed at the outside.

A coupling part 21 into which the upper side of the abutment 10, 10' is inserted is formed at the lower side of the inside of the crown cap 20. The joining portion 21 preferably has a shape in which the inner diameter is gradually reduced toward the upper portion to correspond to the upper side shape of the base 10, 10', 10 ″.

A screw hole 23 is formed in the upper inner side of the crown cap 20. The screw hole 23 is a portion into which the abutment screw 30 to be described later is inserted or into which a rotating tool for rotating the abutment screw 30 is inserted, and is usually formed to penetrate in the vertical direction so as to communicate with the coupling portion 21, but may be formed to communicate with the coupling portion 21 in an inclined manner in the case of an inclined dental implant.

In addition, a coupling step 25 to which the elastic coupling protrusion 13 of the abutment 10, 10', 10 ″ is coupled is formed to be recessed outward in the radial direction at the inner center of the crown cap 20, that is, at the boundary between the coupling portion 21 and the screw hole 23.

In a state where the crown cap 20 is coupled to the upper side of the abutment 10, 10 ', 10 ", the abutment screw 30 is inserted into and coupled to the screw insertion hole 15 of the abutment 10, 10', 10".

The base screw 30 is firmly fastened and fixed in the screw insertion hole 15, or penetrates the screw insertion hole 15 and is firmly fastened and fixed in the anchor 3 on the lower side, thereby playing a role of expanding the elastic coupling projection 13 of the base 10, 10', 10 ″ radially outward.

Further, a thread is formed on the lower peripheral edge of the abutment screw 30 so that the abutment screw 30 is firmly fixed to the abutment 10, 10', 10 ″ in the screw insertion hole 15 or the anchor 3.

Further, a protrusion pressing portion 31 is provided at the upper end of the abutment screw 30, and the protrusion pressing portion 31 pushes the elastic coupling protrusion 13 of the abutment 10, 10 ', 10 "to be opened radially outward when the abutment screw 30 is coupled, so that the elastic coupling protrusion 13 of the abutment 10, 10', 10" is coupled into the coupling ridge 25 of the crown cap 20.

The projection pressing portion 31 preferably has a reverse truncated cone shape in which the cross section gradually increases toward the upper portion, but may have any shape if it has an expanding portion for expanding the elastic coupling projection 13 of the base 10, 10', 10 ″ in the radial direction. Preferably, annular uneven protrusions are formed on the outer peripheral surface of the protrusion pressing portion 31.

Fig. 5-7 are operational views of various embodiments of a cementless dental implant according to one embodiment of the disclosure.

As shown in fig. 5 to 7, in a state where the crown cap 20 is coupled to the upper side of the abutment 10, 10 ', 10 ", when the abutment screw 30 is inserted into the screw insertion hole 15 of the abutment 10, 10', 10" to be directly coupled and fixed or is coupled and fixed to the inside of the fixture by penetrating the screw insertion hole 15 of the abutment 10, 10 ', 10 ", the projection pressing portion 31 of the abutment screw 30 pushes the elastic coupling projection 13 of the abutment 10, 10', 10" to the outside in the radial direction.

At the same time, the elastic coupling protrusion 13 of the abutment 10, 10 ', 10 "is expanded outward in the radial direction and coupled to the coupling ridge 25 of the crown cap 20, so that the crown cap 20 integrally formed with the crown 27 can be firmly coupled to the abutment 10, 10', 10" without using dental cement.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the embodiments described in the present specification and the configurations shown in the drawings are only preferred embodiments of the present invention and do not fully represent the technical idea of the present invention, and therefore, it should be understood that various equivalents and modifications can be substituted for them when the present invention is applied. It should therefore be understood that the above-described embodiments are illustrative and not restrictive in all respects, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

(availability in industry)

The disclosure is applicable to the field of dental implants.