阅读说明：本技术 一种种植牙结构及其制备方法 (Implant structure and preparation method thereof ) 是由 岳术俊 李宁 许奎雪 史春生 史春宝 陈江平 于 2021-06-21 设计创作，主要内容包括：本发明提供了一种种植牙结构及其制备方法,涉及种植牙技术领域；种植牙结构包括相连接的种植体和基台；种植体包括种植部分和连接部分；种植部分由陶瓷材料制成,种植部分外表面设有第一外螺纹,种植部分内设有第一连接孔,第一连接孔设有第一内螺纹；连接部分上部与基台相连接,下部设有与第一内螺纹相连接的第二外螺纹。本发明将种植部分和连接部分设计为螺纹连接,连接稳定性优于焊接方式；并且采用陶瓷材料作为种植体与牙骨的连接部分,在安装过程中不会造成牙骨的损坏,而且陶瓷具有良好的生物相容性,能与骨组织实现较好的骨结合,提高了与牙骨的连接强度,避免出现松动。(The invention provides a dental implant structure and a preparation method thereof, relating to the technical field of dental implants; the dental implant structure comprises an implant body and an abutment which are connected; the implant comprises an implant part and a connecting part; the planting part is made of ceramic materials, a first external thread is arranged on the outer surface of the planting part, a first connecting hole is arranged in the planting part, and a first internal thread is arranged in the first connecting hole; the upper part of the connecting part is connected with the base station, and the lower part of the connecting part is provided with a second external thread connected with the first internal thread. According to the invention, the planting part and the connecting part are designed to be in threaded connection, so that the connection stability is superior to that of a welding mode; and ceramic material is used as the connecting part of the implant and the dental bone, so that the dental bone cannot be damaged in the installation process, and the ceramic material has good biocompatibility, can realize better bone combination with bone tissues, improves the connecting strength with the dental bone and avoids looseness.)

1. A dental implant structure comprises an implant body and an abutment which are connected; characterized in that the implant comprises an implant part (100) and a connecting part (200);

the planting part (100) is made of ceramic materials, a first external thread (110) is arranged on the outer surface of the planting part (100), a first connecting hole (120) is formed in the planting part (100), and a first internal thread is arranged in the first connecting hole (120);

the connecting part (200) is positioned in the first connecting hole (120), the upper part of the connecting part (200) is connected with the base, and the lower part of the connecting part is provided with a second external thread (210) connected with the first internal thread.

2. A dental implant arrangement according to claim 1, characterised in that the connecting part (200) is made of carbon fibre composite material.

3. A dental implant arrangement according to claim 2, characterised in that the outer surface of the connecting part (200) is provided with a modified membrane.

4. A dental implant structure according to claim 1, characterised in that the implant part (100) comprises a first stem part (130) and a first stem part (140) integrally connected from top to bottom, the radial dimension of the first stem part (130) gradually decreasing from top to bottom, and the radial dimension of the first stem part (130) being larger than the radial dimension of the first stem part (140).

5. A dental implant arrangement according to claim 1, characterised in that the first external thread (110) comprises a first (111), a second (112) and a third (113) thread part, the pitch of the first (111) and third (113) thread parts being smaller than the pitch of the second thread part (112).

6. A dental implant arrangement according to claim 1, characterised in that the first connection hole (120) comprises a first section (121) and a second section (122) arranged in series from top to bottom, the first section (121) having a radial dimension greater than the second section (122), the abutment being mounted in the first section (121) at a lower portion thereof, the second section (122) being provided with the first internal thread.

7. A dental implant structure according to claim 1, characterised in that the bottom end of the implant portion (100) is provided with a plurality of cutaway portions arranged at intervals along the circumferential direction of the implant portion (100).

8. A method of preparing a dental implant structure, comprising the steps of:

forming a planting part (100): sintering SiO₂、CaO、Na₂O and P₂O₅Forming a ceramic body, machining a first threaded portion (111) on an outer surface of the ceramic body, machining a first connection hole (120) in the ceramic body, and machining a first internal thread in the first connection hole (120);

the connecting portion (200) is formed: machining and forming a second external thread (210) on the outer surface of the base body;

forming an implant: abutting the first internal thread and the second external thread (210).

9. A method of manufacturing a dental implant structure according to claim 8, characterised in that the forming of the connecting part (200) comprises: and taking the carbon fiber composite material as the matrix, and carrying out pyrolytic carbon treatment on the surface of the matrix to form a modified film.

10. The method of claim 9, wherein the pyrolytic carbon treatment process comprises: adding hydroxyapatite into thermosetting phenolic resin to prepare slurry, adopting pre-oxidized fibers as a reinforcing agent, coating the slurry and the reinforcing agent on the surface of the matrix, and then heating and molding the modified film.

Technical Field

The invention relates to the technical field of dental implants, in particular to a dental implant structure and a preparation method thereof.

Background

Compared with the traditional removable denture repair, the dental implant repair technology is more reliable, stable and comfortable, and the acceptance of people is also increasingly improved. The existing implant generally comprises an implant body, an abutment and a dental crown, and in order to improve the structural strength of the implant body, a metal reinforcing part is arranged outside the implant body, and the implant body is fixed by the threaded connection of the metal reinforcing part and a dental bone.

However, the above structure has the following disadvantages: 1. the metal reinforcing part and the implant are butted together by welding, the connection strength is poor, and the metal reinforcing part and the implant are easy to loosen; 2. the simple threaded connection of the metal reinforcing part and the tooth bone can lead to the loosening phenomenon of the implant after long-term use, and meanwhile, the internal thread groove of the tooth bone can be damaged to a certain extent when the metal reinforcing part enters, so that the instability of the implant is caused, and the quality of tooth implantation is influenced; 3. the metal reinforcing part can cause the corrosion of metal materials in a human body to cause the release of toxic elements, the biocompatibility is reduced, the surface osseointegration can be only formed slowly, and the rapid bone ingrowth can not be formed, so that the planting period is longer, and the immediate planting is difficult to realize.

Disclosure of Invention

The invention aims to provide a dental implant structure, which aims to solve the problems of poor connection stability, poor biocompatibility, long planting period and the like of the conventional dental implant.

In order to solve the above problems, the present invention provides a dental implant structure comprising an implant and an abutment connected to each other; the implant comprises an implant part and a connecting part; the planting part is made of a ceramic material, a first external thread is arranged on the outer surface of the planting part, a first connecting hole is formed in the planting part, and a first internal thread is arranged in the first connecting hole; the connecting part is positioned in the first connecting hole, the upper part of the connecting part is connected with the base station, and the lower part of the connecting part is provided with a second external thread connected with the first internal thread.

Further, the connecting portion is made of a carbon fiber composite material.

Further, the outer surface of the connecting part is provided with a modified film.

Further, plant the part including first frustum portion and the first shaft-like portion of from top to bottom body coupling, the radial dimension of first frustum portion from top to bottom reduces gradually, just the radial dimension of first frustum portion is greater than the radial dimension of first shaft-like portion.

Further, the first external thread includes a first thread portion, a second thread portion, and a third thread portion, and pitches of the first thread portion and the third thread portion are smaller than a pitch of the second thread portion.

Further, first connecting hole is including first section and the second section that from top to bottom sets gradually, first section's radial dimension is greater than the radial dimension of second section, the lower part of base station is installed in the first section, the second section is equipped with first internal thread.

Furthermore, a plurality of gap portions are formed in the bottom end of the planting portion, and the gap portions are arranged at intervals along the circumferential direction of the planting portion.

In addition, the embodiment also provides a preparation method of the dental implant structure, which comprises the following steps: forming a planting part: sintering SiO₂、CaO、Na₂O and P₂O₅Manufacturing a ceramic body according to a certain proportion, machining and forming a first threaded part on the outer surface of the ceramic body, machining and forming a first connecting hole in the ceramic body, and machining and forming a first internal thread in the first connecting hole; forming a connecting part: machining and forming a second external thread on the base body; forming an implant: abutting the first internal thread and the second external thread.

Further, the connecting portion molding includes: and taking the carbon fiber composite material as the matrix, and carrying out pyrolytic carbon treatment on the surface of the matrix to form a modified film.

Further, the pyrolytic carbon treatment process comprises: adding hydroxyapatite into thermosetting phenolic resin to prepare slurry, adopting pre-oxidized fibers as a reinforcing agent, coating the slurry and the reinforcing agent on the surface of the matrix, and then heating and molding the modified film.

According to the dental implant structure and the preparation method thereof provided by the invention, the implant part and the connecting part are designed to be in threaded connection, and the connection stability is superior to that of a welding mode; and ceramic material is used as the connecting part of the implant and the dental bone, so that the dental bone cannot be damaged in the installation process, and the ceramic material has good biocompatibility, can realize better bone combination with bone tissues, improves the connecting strength with the dental bone and avoids looseness.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of a dental implant structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a planting part provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a connecting portion according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for manufacturing a dental implant structure according to an embodiment of the present invention.

Description of reference numerals:

100-planting part; 110-a first external thread; 111-a first threaded portion; 112-a second threaded portion; 113-a third threaded portion; 120-a first connection hole; 121-first section; 122-a second segment; 130-a first frustum portion; 140-a first rod-shaped portion; 200-a linking moiety; 210-a second external thread; 220-a second frustum portion; 230-conical section.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, in view of the problems of poor connection stability, easy loosening and poor bonding to the tooth bone of the conventional implant, the present embodiment provides a dental implant structure, which includes an implant and an abutment (not shown) connected to each other, and the implant of the present embodiment is made of a non-metallic material, different from the conventional implant structure, and the specific material is given in the following description.

The implant of the present embodiment includes an implant part 100 and a connection part 200, the implant part 100 is used for being implanted into a tooth bone, the connection part 200 is used for abutting the implant part 100 and an abutment, and the structural strength of the implant part 100 can be enhanced to some extent, so that the implant part 100 of the present embodiment can be regarded as a metal reinforcement part of an existing implant to have the same function, and the connection part 200 can be regarded as a body of the existing implant.

The existing implant is mainly made of titanium alloy or pure titanium, and the titanium alloy or pure titanium can cause corrosion of metal materials in a complex human body environment to cause release of toxic elements, so that biocompatibility of the implant is reduced, the implant can only slowly form surface osseointegration and cannot form rapid bone ingrowth, the implantation period is long, and immediate implantation is difficult to realize.

Therefore, the present implementation designs the planting part 100 to be made of ceramic material, and the outer surface of the planting part 100 is provided with the first external thread 110, and planting of the dental implant is realized through the cooperation between the first external thread 110 and the dental bone. The ceramic material contains hydroxyl and has certain porosity, the ceramic increases the later stability of the implant through the locking effect of the ceramic and the tooth bone tissue, the biological tissue grows in and is firmly bonded with the surface of the biological tissue, the ceramic implant part 100 has good biocompatibility, can realize better bone combination with the bone tissue, has the color similar to that of a natural tooth, and can effectively overcome the aesthetic problem of the exposure of the metal color of the neck part of the titanium implant.

In order to connect the planting part 100 with the connection part 200, a first connection hole 120 is formed in the planting part 100 of this embodiment, the first connection hole 120 is provided with a first internal thread (not shown in the figure), the upper part of the connection part 200 of this embodiment is connected with the abutment, and the lower part is provided with a second external thread 210 connected with the first internal thread, that is, the existing welding of the implant and the metal reinforcement part is replaced by threaded connection.

By adopting the structural design, the planting part 100 and the connecting part 200 are designed to be in threaded connection, and the connection stability is superior to that of a welding mode; and adopt ceramic material as planting part 100, can not cause the damage of cementum in the installation, the pottery has good biocompatibility moreover, can realize better and quick osseointegration with bone tissue, has not only improved the joint strength with cementum, avoids appearing becoming flexible, can shorten planting cycle moreover.

Based on the structure, because the material of the existing connecting part 200 is generally ceramic or metal, the difference between the elastic modulus and the alveolar bone is large, and the deformation of the maxillary bone is easy to occur, the material of the connecting part 200 is optimized in the embodiment, the carbon fiber composite material is selected, and the carbon fiber composite material is complex to process due to color difference, so that the existing dental implant does not generally adopt the carbon fiber composite material as the material of the implant, and the inventor finds that the carbon fiber composite material is a high-performance material, not only can meet the requirement of the tooth root in strength, but also the elastic modulus is close to the alveolar bone, and after being implanted into the mouth of a patient as a cementum substitute of the patient without teeth, the implant cannot be absorbed by the alveolar bone, and the deformation of the maxillary bone can be effectively prevented.

In addition, in order to further enable the connection part 200 to be better combined with the alveolar bone, the present embodiment is provided with a modified film (not shown in the figure) on the outer surface of the connection part 200, and the specific treatment process includes adding hydroxyapatite fine-divided slurry into thermosetting phenolic resin, using pre-oxidized fibers as a reinforcing agent, coating the slurry and the reinforcing agent on the surface of the substrate, and then heating and molding the modified film.

Referring to fig. 2, the planting portion 100 of the present embodiment includes a first tapered portion 130 (also referred to as a circular truncated cone portion) and a first rod portion 140 integrally connected from top to bottom, the taper of the first tapered portion 130 is preferably 8 °, the radial dimension of the first tapered portion 130 gradually decreases from top to bottom, and the radial dimension of the first tapered portion 130 is greater than the radial dimension of the first rod portion 140, such a structure is designed to facilitate the connection between the planting portion 100 and the tooth bone, and preferably, the radial dimension of the first rod portion 140 of the present embodiment is also designed to gradually decrease from top to bottom to facilitate the threaded connection with the thread groove of the tooth bone.

In order to improve the stability of the first external thread 110 after being connected to the bone, in the present embodiment, the first external thread 110 is designed to include a first thread portion 111, a second thread portion 112 and a third thread portion 113, wherein the thread pitches of the first thread portion 111 and the third thread portion 113 are smaller than the thread pitch of the second thread portion 112, or the first thread portion 111 and the third thread portion 113 are fine threads, and the second thread portion 112 in the middle is a coarse thread, so that the locking force at the connection between the implant portion 100 and the bone is changed along the length direction thereof, thereby preventing the connection between the implant portion 100 and the bone from being loosened under the same vibration force.

Specifically, the length of the top thread of the first thread part 111, the length of the second thread part 112, and the length of the third thread part 113 of this embodiment may be designed to be 2-4mm, respectively, and such a design parameter may ensure a stable locking force between the implant part 100 and the tooth bone.

The first connecting hole 120 of the planting portion 100 of the present embodiment includes a first section 121 and a second section 122, the radial dimension of the first section 121 is larger than that of the second section 122, and the second section 122 is provided with a first internal thread. The connecting portion 200 of this embodiment is partially installed in the abutment, and is partially provided with the second external thread 210, and the lower portion of the abutment is installed in the first stage 121.

In addition, for the convenience of assembly, the bottom end of the implant portion 100 is provided with a plurality of notch portions (not shown in the figure), the notch portions are arranged at intervals along the circumferential direction of the implant portion 100, each notch portion has two side walls perpendicular to each other, and the notch portions are used for avoiding negative pressure generated between the tooth bone and the implant portion 100 in the installation process, so that the butt joint of the implant portion 100 and the tooth bone is facilitated.

Referring to fig. 3, the upper portion of the connecting portion 200 of the present embodiment is provided with a second tapered platform portion 220 whose radial size gradually decreases from top to bottom, the angle formed by the side wall of the second tapered platform portion 220 and the axis thereof is 45 °, the second tapered platform portion 220 is located in the base and is adapted to a second connecting hole (not shown in the figure) of the base, in order to improve the connecting stability of the second tapered platform portion 220 and the base, the cross-sectional size of the second tapered platform portion 220 is designed to be hexagonal or octagonal, the lower portion of the connecting portion 200 is provided with the second external thread 210, the bottom end of the connecting portion 200 is provided with a tapered portion 230, and the angle of the tapered portion 230 is 120 °.

With reference to fig. 4, based on the dental implant structure, the embodiment further provides a method for preparing the dental implant structure, including the following steps:

forming the planting part 100: sintering SiO₂、CaO、Na₂O and P₂O₅Manufacturing a ceramic body according to a certain proportion, machining and forming a first thread part 111 on the outer surface of the ceramic body, machining and forming a first connecting hole 120 in the ceramic body, and machining and forming a first internal thread in the first connecting hole 120;

the connecting portion 200 is formed: forming a second external thread 210 on the substrate;

forming an implant: abutting the first internal threads and the second external threads 210.

Among them, the inventor found through a lot of experiments that when the SiO of the planting part 100 is formed during the forming process of the planting part 100₂、CaO、Na₂O and P₂O₅When the mixture ratio of the components is 49.6%, 21.7%, 22.7% and 6.1% in sequence, the planting part 100 has the best structural strength and biocompatibility.

Further, the process of forming the connecting portion 200 of the present embodiment includes: the carbon fiber composite material is used as a matrix, and the surface of the matrix is subjected to pyrolytic carbon treatment to form a modified film. The pyrolytic carbon treatment process comprises: adding about 20% of hydroxyapatite into thermosetting phenolic resin to form slurry, adopting pre-oxidized fibers as a reinforcing agent, coating the slurry and the reinforcing agent on the surface of a matrix, and then heating and forming the modified film at the temperature of 1000 ℃.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.