JP2828311B2 - Artificial root - Google Patents
Artificial rootInfo
- Publication number
- JP2828311B2 JP2828311B2 JP2095601A JP9560190A JP2828311B2 JP 2828311 B2 JP2828311 B2 JP 2828311B2 JP 2095601 A JP2095601 A JP 2095601A JP 9560190 A JP9560190 A JP 9560190A JP 2828311 B2 JP2828311 B2 JP 2828311B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic material
- cylindrical
- bottomed cylindrical
- tooth root
- metal base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
- A61C8/0013—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy with a surface layer, coating
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Ceramic Engineering (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Dentistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Prosthetics (AREA)
Description
【発明の詳細な説明】 「技術分野」 本発明は、金属基体とセラミックス材料との複合材か
らなる人工歯根の改良に関する。Description: TECHNICAL FIELD The present invention relates to an improvement of an artificial root made of a composite material of a metal base and a ceramic material.
「従来技術及びその問題点」 この種の人工歯根として従来、金属基体、例えばチタ
ンからなる有底の歯根基材の外面に、セラミックス材
料、例えばハイドロキシアパタイト層を形成したものが
知られている。ハイドロキシアパタイト層は、溶射やコ
ーティングによる他、焼結によって、歯根基材の外側に
密着する有底円筒状に形成され、両者が接着剤を介して
接合されている。歯根基材は主に強度部材としての機能
を果たし、ハイドロキシアパタイトは顎骨との生体親和
性を高める働きをする。ハイドロキシアパタイトを有底
円筒状に形成することは、顎骨に生体親和性に優れたハ
イドロキシアパタイトのみを接触させるために不可欠と
考えられてきた。"Prior art and its problems" As this type of artificial tooth root, there is conventionally known an artificial tooth in which a ceramic material, for example, a hydroxyapatite layer is formed on the outer surface of a bottomed tooth root base made of titanium, for example. The hydroxyapatite layer is formed into a bottomed cylindrical shape that adheres to the outside of the root base material by sintering in addition to thermal spraying or coating, and both are joined via an adhesive. The root base material mainly functions as a strength member, and hydroxyapatite functions to increase biocompatibility with the jaw bone. Forming hydroxyapatite into a cylindrical shape with a bottom has been considered indispensable for bringing only hydroxyapatite having excellent biocompatibility into contact with the jaw bone.
ところがこの従来の人工歯根には、有底円筒状のハイ
ドロキシアパタイトの成形および加工が困難であり、ま
た加工時に底部に応力集中が生じやすい。この応力集中
のために生じる割れによって、製品の歩留まりが悪くな
るという問題があった。さらにこの従来の人工歯根は、
歯根基材とハイドロキシアパタイトとの接着剤の接着力
以上のトルクが加わると、歯根基材が有底筒状のハイド
ロキシアパタイトに対して回転してしまうというおそれ
があった。However, in this conventional artificial tooth root, it is difficult to form and process a hydroxyapatite having a bottomed cylindrical shape, and stress concentration is apt to occur at the bottom during the processing. There is a problem that the yield of products is deteriorated by the cracks generated due to the stress concentration. In addition, this conventional artificial root,
When a torque greater than the adhesive force of the adhesive between the root substrate and the hydroxyapatite is applied, the root substrate may rotate with respect to the bottomed cylindrical hydroxyapatite.
「発明の目的」 本発明は、金属基体とセラミックス材料の複合材料か
らなる人工歯根についての以上の問題意識に基づき、よ
り強度が高い複合人工歯根を得ることを目的とする。[Object of the Invention] An object of the present invention is to obtain a composite artificial dental root having higher strength based on the above awareness of the problem with an artificial dental root made of a composite material of a metal substrate and a ceramic material.
「発明の概要」 本発明は、従来の問題点が、セラミックス材料が有底
円筒状をしていることに起因しているとの上記解析結果
に基づき、セラミックス材料を両端面の開放された筒状
に形成し、金属基体を、一端部にこの筒状セラミックス
材料の一端面に当接する外方フランジを有し、該筒状セ
ラミックス材料内に挿入される有底筒状金属基体とした
ことを特徴としている。"Summary of the Invention" The present invention is based on the above analysis result that the conventional problem is caused by the fact that the ceramic material has a cylindrical shape with a bottom. And a metal substrate having an outer flange at one end abutting against one end surface of the cylindrical ceramic material, and a bottomed cylindrical metal substrate inserted into the cylindrical ceramic material. Features.
この構成によると、比較的脆い性質を持つセラミック
ス材料が両端の開放された単純な円筒状であるために、
焼結および加工時に応力集中が生じることがなく、これ
が原因で割れが生じるおそれもない。有底筒状金属基体
は、筒状セラミックス材料の下端面から露出する底部外
面が顎骨に接触するが、金属基体として適当な材料を選
定すれば、生体親和性の面からの問題は生じない。むし
ろ強度上問題のない筒状セラミックス材料の生体親和性
によって、より好ましい骨性癒着状態を維持させること
ができ、全体として従来品より好ましい結果が得られ
る。このような目的で使用する金属基体としては、チタ
ンまたはステンレスが好ましい。またセラミックス材料
としては、生体親和性に優れたリン酸カルシウム系セラ
ミックス、なかでもハイドロキシアパタイト、フッ素ア
パタイト等のアパタイトが好ましい。According to this configuration, since the relatively brittle ceramic material has a simple cylindrical shape with both ends open,
There is no stress concentration during sintering and processing, and there is no risk of cracking due to this. In the bottomed cylindrical metal substrate, the bottom outer surface exposed from the lower end surface of the cylindrical ceramic material comes into contact with the jaw bone. However, if an appropriate material is selected as the metal substrate, no problem occurs in terms of biocompatibility. Rather, due to the biocompatibility of the cylindrical ceramic material having no problem in strength, a more favorable state of bone adhesion can be maintained, and as a whole, more favorable results can be obtained than the conventional product. As the metal substrate used for such a purpose, titanium or stainless steel is preferable. As the ceramic material, a calcium phosphate ceramic excellent in biocompatibility, and in particular, apatite such as hydroxyapatite and fluorapatite is preferable.
また有底筒状金属基体は筒状セラミックス材料より下
部まで位置すること、すなわち筒状セラミックス材料の
下端面と有底筒状金属基体の底部外面とは連続した滑ら
かな曲線状に形成されていることがなお好ましい。これ
によって、歯根上部から垂直に圧縮荷重が加わったと
き、その応力を金属部材で受けることになり、セラミッ
クス材の破壊を回避することができる。したがって特に
歯根を顎骨内に埋入する際に、セラミックス材への荷重
負担を減少させることになる。Further, the bottomed cylindrical metal base is located below the cylindrical ceramic material, that is, the lower end surface of the cylindrical ceramic material and the bottom outer surface of the bottomed cylindrical metal base are formed in a continuous smooth curved shape. Is still more preferred. Thus, when a compressive load is applied vertically from the upper part of the tooth root, the stress is received by the metal member, and it is possible to avoid the breakage of the ceramic material. Therefore, when the tooth root is implanted in the jawbone, the load on the ceramic material is reduced.
「発明の実施例」 以下図示実施例について本発明を説明する。アパタイ
ト筒11は、同一径の円筒状に形成されていて、その両端
部が開放されている。チタンからなる有底筒状金属基体
21は、アパタイト筒11内に挿入される有底筒状部21a
と、この有底筒状部21aの底部と反対側の端部に形成し
た外方フランジ21bを有する。有底筒状部21aの中心孔21
cには、雌ねじ21dが形成されている。"Examples of the Invention" The present invention will be described below with reference to illustrated examples. The apatite cylinder 11 is formed in a cylindrical shape having the same diameter, and both ends thereof are open. Bottom cylindrical metal substrate made of titanium
21 is a bottomed cylindrical portion 21a inserted into the apatite cylinder 11
And an outer flange 21b formed at an end opposite to the bottom of the bottomed cylindrical portion 21a. Center hole 21 of bottomed cylindrical part 21a
A female screw 21d is formed in c.
金属基体21の外方フランジ21bは、アパタイト筒11の
一端部（上端部）に密着し、有底筒状部21aの底部（下
端部）は、アパタイト筒11の他端部（下端部）から露出
している。そして、アパタイト筒11の下端部と、有底筒
状部21aの底部外面とは、滑らかな曲面を描くように加
工されている。The outer flange 21b of the metal base 21 is in close contact with one end (upper end) of the apatite cylinder 11, and the bottom (lower end) of the bottomed cylindrical part 21a is separated from the other end (lower end) of the apatite cylinder 11. It is exposed. The lower end portion of the apatite cylinder 11 and the bottom outer surface of the bottomed cylindrical portion 21a are processed so as to draw a smooth curved surface.
アパタイト筒11には、その周方向の一部に、軸線と平
行な回り止め溝11aが形成され、有底筒状部21a外面に
は、この回り止め溝11aに嵌まる突起21eが形成されてい
る。溝と突起の関係は勿論逆にしてもよい。The apatite cylinder 11 has a detent groove 11a formed in a part of its circumferential direction parallel to the axis, and a projection 21e that fits into the detent groove 11a is formed on the outer surface of the bottomed cylindrical portion 21a. I have. Of course, the relationship between the groove and the projection may be reversed.
従ってこの人工歯根は、有底筒状金属基体21の有底筒
状部21aをアパタイト筒11に嵌め、外方フランジ21bをア
パタイト筒11の上端部に密着させた状態で、接着剤によ
り接着する。接着剤は、特に弾性を有する弾性接着剤を
用いることが好ましい。接着剤の弾性により、アパタイ
ト筒11を有底筒状金属基体21に対して弾性的に保持し
て、顎骨に穿設する埋設孔との接触性を高めることがで
きる。Therefore, this artificial tooth root is adhered with an adhesive in a state where the bottomed tubular portion 21a of the bottomed tubular metal base 21 is fitted to the apatite cylinder 11, and the outer flange 21b is brought into close contact with the upper end of the apatite cylinder 11. . As the adhesive, it is particularly preferable to use an elastic adhesive having elasticity. Due to the elasticity of the adhesive, the apatite cylinder 11 can be elastically held with respect to the bottomed cylindrical metal base 21 and the contact property with the embedding hole formed in the jaw bone can be increased.
有底筒状金属基体21の雌ねじ21dには、本人工歯根を
顎骨内に埋め込んだ後、義歯の支台部が螺合固定され
る。義歯の方向性を確保するために、中心孔21cの内面
に、この雌ねじ21dに代えて、キー溝を設けることがで
き、あるいは逆にキー溝も雌ねじ21dも設けずに、接着
剤のみで接着することもできる。After the present artificial tooth is embedded in the jawbone, the abutment portion of the denture is screwed and fixed to the female screw 21d of the bottomed cylindrical metal base 21. In order to secure the direction of the denture, a key groove can be provided on the inner surface of the center hole 21c instead of the female screw 21d, or conversely, the key hole and the female screw 21d are not provided, and only the adhesive is used. You can also.
なお回り止めは、有底筒状部21aとアパタイト筒11の
上端面との間に設けることもできる。第３図はその例を
示すもので、有底筒状金属基体21の外方フランジ21bの
下面に突起22fを設け、アパタイト筒11の上端部に、こ
の突起22fの嵌まる溝11bを設けている。The detent can also be provided between the bottomed cylindrical portion 21a and the upper end surface of the apatite cylinder 11. FIG. 3 shows an example in which a projection 22f is provided on the lower surface of an outer flange 21b of a bottomed cylindrical metal base 21, and a groove 11b in which the projection 22f fits is provided at an upper end of the apatite cylinder 11. I have.
「発明の効果」 以上のように本発明は、金属基体とセラミックス材料
の複合材料からなる人工歯根において、セラミックス材
料を両端の開放された筒状に形成したから、その成形お
よび加工が容易であり、かつ残留応力が生じにくく、割
れにくい。そしてこの筒状のセラミックス材料内には、
一端にフランジを有する有底筒状金属基体が嵌め込まれ
るから、全体として高い強度の人工歯根が得られる。[Effects of the Invention] As described above, in the present invention, in an artificial tooth root made of a composite material of a metal base and a ceramic material, the ceramic material is formed in a cylindrical shape with both ends open, so that the molding and processing thereof are easy. , And hardly generate residual stress, and hardly crack. And in this cylindrical ceramic material,
Since the bottomed cylindrical metal base having a flange at one end is fitted therein, an artificial root having high strength as a whole can be obtained.
第１図は本発明の人工歯根の実施例を示す縦断面図、第
２図は第１図のII−II線に沿う断面図、第３図は回り止
め手段の他の実施例を示す要部の分解斜視図である。 11……アパタイト筒、11a、11b……回り止め溝、21……
有底筒状金属基体、21a……有底筒状部、21b……外方フ
ランジ、21c……中心孔、21d……雌ねじ、21e、21f……
突起。FIG. 1 is a longitudinal sectional view showing an embodiment of the artificial tooth root of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. It is an exploded perspective view of a part. 11 …… Apatite cylinder, 11a, 11b …… Detent groove, 21 ……
Bottomed tubular metal base, 21a ... bottomed tubular portion, 21b ... outer flange, 21c ... center hole, 21d ... female screw, 21e, 21f ...
Protrusions.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 雅史 東京都板橋区前野町２丁目36番９号 旭 光学工業株式会社内 (72)発明者 松本 智勇 東京都板橋区前野町２丁目36番９号 旭 光学工業株式会社内 (56)参考文献 特開 昭57−176905（ＪＰ，Ａ) 実開 昭61−168805（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) A61C 8/00──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masafumi Nakamura 2-36-9 Maenocho, Itabashi-ku, Tokyo Asahi Optical Industry Co., Ltd. (72) Tomohiro Matsumoto 2-36-9 Maenocho, Itabashi-ku, Tokyo No. Asahi Optical Industry Co., Ltd. (56) References JP-A-57-176905 (JP, A) JP-A-61-168805 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) A61C 8/00
Claims (3)
らなる人工歯根において、 上記セラミックス材料を両端面の開放された筒状に形成
し、 上記金属基体を、一端部にこの筒状セラミックス材料の
一端面に当接する外方フランジを有し、該筒状セラミッ
クス材料内に挿入される有底筒状金属基体となしたこと
を特徴とする人工歯根。1. An artificial tooth root made of a composite material of a metal substrate and a ceramic material, wherein the ceramic material is formed in a cylindrical shape having both open end faces, and the metal substrate is provided at one end with the cylindrical ceramic material. An artificial tooth root having an outer flange abutting on one end surface and serving as a bottomed cylindrical metal base inserted into the cylindrical ceramic material.
の他端面と有底筒状金属基体の底部外面とは、連続した
滑らかな曲面状に形成されている人工歯根。2. The artificial tooth root according to claim 1, wherein the other end surface of the cylindrical ceramic material and the bottom outer surface of the bottomed cylindrical metal base are formed into a continuous smooth curved surface.
クス材料と有底筒状金属基体との間には、回り止め手段
が設けられている人工歯根。3. The artificial tooth root according to claim 1, wherein a detent means is provided between the cylindrical ceramic material and the bottomed cylindrical metal base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2095601A JP2828311B2 (en) | 1990-04-11 | 1990-04-11 | Artificial root |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2095601A JP2828311B2 (en) | 1990-04-11 | 1990-04-11 | Artificial root |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03292947A JPH03292947A (en) | 1991-12-24 |
| JP2828311B2 true JP2828311B2 (en) | 1998-11-25 |
Family
ID=14142075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2095601A Expired - Fee Related JP2828311B2 (en) | 1990-04-11 | 1990-04-11 | Artificial root |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2828311B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9433480B2 (en) * | 2010-12-21 | 2016-09-06 | Zimmer Dental, Inc. | Implant with porous sleeve including anti-rotation features |
| CH705356A2 (en) | 2011-08-11 | 2013-02-15 | Regenhu Ag | Body with a basic structure made from bone substitute material and methods of making. |
-
1990
- 1990-04-11 JP JP2095601A patent/JP2828311B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03292947A (en) | 1991-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8241036B2 (en) | Implant with a ceramic coating, and method for ceramic coating of an implant | |
| Sahafi et al. | Effect of surface treatment of prefabricated posts on bonding of resin cement | |
| Angkasith et al. | Cleaning methods for zirconia following salivary contamination | |
| JPS6034252Y2 (en) | dental implant | |
| Burke et al. | Dentin-bonded all-ceramic crowns: current status | |
| JP2828311B2 (en) | Artificial root | |
| US4521191A (en) | Condensing instrument for packing and condensing in connection with placement of dental composite resin restorative materials | |
| JP2880755B2 (en) | Artificial root | |
| Donovan et al. | Conservative indirect restorations for posterior teeth: Cast versus bonded ceramic | |
| Tay et al. | Effects of some finishing techniques on cervical margins of porcelain laminates. | |
| Garcia-Godoy et al. | The effect of acid etching on two glass ionomer lining cements. | |
| JPH0323856A (en) | Artificial root of tooth | |
| Stokes et al. | Porous metal coatings for resin-bonding systems | |
| Ajay et al. | Effect of Implant Abutment Acid Etching on the Retention of Crowns Luted with Different Cements: An: In Vitro: Comparative Evaluation | |
| JPH03292948A (en) | Artificial dental root | |
| KR102085336B1 (en) | Method for manufacturing fixed denture using PEEK and zirconia and fixed denture manufactured therefrom | |
| US5104323A (en) | Metal-ceramic filling for teeth | |
| Alkhudhairy | Microtensile and microshear bond strength of cemented ceramics using self-etching primer versus conventional surface treatment | |
| Moser et al. | Adhesion of orthodontic cements to human enamel | |
| WO2011127178A1 (en) | Process for fabricating tooth restoration | |
| JPH0719458Y2 (en) | Artificial tooth root | |
| JPS63279835A (en) | Artificial dental root | |
| JP7441508B2 (en) | Antibacterial partial denture and its manufacturing method | |
| Al Qassar et al. | Teeth bracket adhesives: Clinical considerations: A review article | |
| JPS5931224Y2 (en) | dental implant material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |