JPH0496745A - Artificial tooth root - Google Patents
Artificial tooth rootInfo
- Publication number
- JPH0496745A JPH0496745A JP2212673A JP21267390A JPH0496745A JP H0496745 A JPH0496745 A JP H0496745A JP 2212673 A JP2212673 A JP 2212673A JP 21267390 A JP21267390 A JP 21267390A JP H0496745 A JPH0496745 A JP H0496745A
- Authority
- JP
- Japan
- Prior art keywords
- polygonal
- tooth root
- hole
- core member
- artificial tooth
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 46
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 210000000332 tooth crown Anatomy 0.000 description 5
- 238000002513 implantation Methods 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 3
- 239000001506 calcium phosphate Substances 0.000 description 3
- 150000003058 platinum compounds Chemical class 0.000 description 3
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 3
- 229940078499 tricalcium phosphate Drugs 0.000 description 3
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 3
- 235000019731 tricalcium phosphate Nutrition 0.000 description 3
- 229940045985 antineoplastic platinum compound Drugs 0.000 description 2
- 229910052586 apatite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052661 anorthite Inorganic materials 0.000 description 1
- 239000005312 bioglass Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- NWXHSRDXUJENGJ-UHFFFAOYSA-N calcium;magnesium;dioxido(oxo)silane Chemical compound [Mg+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O NWXHSRDXUJENGJ-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 1
- 229910052637 diopside Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、顎骨に穿設される孔に埋め込んて固定される
人工歯根に係り、特に顎骨に埋め込まれる歯根本体と、
該歯根本体に取付けられる上部構造体とからなる２ピー
ス型人工歯根関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an artificial tooth root that is embedded and fixed in a hole drilled in the jawbone, and particularly to a tooth root body that is embedded in the jawbone,
The present invention relates to a two-piece artificial tooth root comprising a superstructure attached to the tooth root body.
（従来の技術）
人工歯を顎骨に固定する場合、まず顎骨の上面の歯肉粘
膜を切開し、顎骨にドリルにより孔を穿設して、その孔
に歯根本体を植設し、２〜３ケ月後、すなわち人工歯根
が新生骨によって固定された後に上部構造体を構築する
。(Conventional technology) When fixing an artificial tooth to the jawbone, first, the gingival mucosa on the upper surface of the jawbone is incised, a hole is made in the jawbone with a drill, and the tooth root body is implanted in the hole. After that, the superstructure is constructed after the artificial tooth root is fixed with new bone.
このような人工歯根において、歯根本体を生体親和性の
あるアパタイト等のセラミック体の中心にチタン等の金
属製芯材を植設し、該芯材の上部構造体をねじ付は等に
より固定する構造とすることか、顎骨への人工歯根の埋
設強度を増大させ、かつ金属製芯材によって人工歯根自
体の強度を増大させる上て好ましい、このように、歯根
本体と金属製芯材からなるものにおいては、歯根本体を
構成するセラミックの円穴に金属製芯材を嵌着し、該金
属製芯材の中心のねじ穴に螺合するねじにより上部構造
体を取付ける構造を有している。In such artificial tooth roots, a metal core material such as titanium is implanted in the center of a biocompatible ceramic body such as apatite, and the upper structure of the core material is fixed with screws or the like. This structure is preferable because it increases the strength of embedding the artificial tooth root in the jawbone, and the strength of the artificial tooth root itself is increased by the metal core material. The tooth root body has a structure in which a metal core is fitted into a ceramic circular hole, and an upper structure is attached by a screw that is screwed into a screw hole in the center of the metal core.
（発明が解決すべき課ＩＩ）
しかし、上記構造によると１人工歯根の使用期間の経過
により、セラミック製歯根本体に対して金属製芯材が回
り、また、金属製芯材に対して上部構造体が回ってしま
い、その結果、歯冠が浮いてしまい、ものが噛めなくな
ることがあるという問題点かあった。(Problem II to be Solved by the Invention) However, according to the above structure, as the usage period of one artificial tooth root passes, the metal core material rotates around the ceramic tooth root body, and the upper structure rotates around the metal core material. The problem was that the patient's body would rotate, causing the crown of the tooth to float, making it difficult to chew.
本発明は、このような問題点を解決し、歯根本体を構成
するセラミックと金属製芯材、並びに金属製芯材と上部
構造体との回り止めが長期にわたって確保される構造の
人工歯根を提供することを目的とする。The present invention solves these problems and provides an artificial tooth root with a structure that ensures long-term rotation prevention between the ceramic and metal core material that constitutes the tooth root body, as well as the metal core material and the upper structure. The purpose is to
（課題を解決するための手段）
上記の目的を達成するため、本発明は、顎骨に埋め込ま
れる歯根本体と、該歯根本体に取付けられる上部構造体
とからなる２ピース型人工歯根において、前記歯根本体
をセラミックにより構成し、前記歯根本体の中心に少な
くとも一部を多角形または楕円形とした芯材取付は穴を
設け、該芯材取付は穴の多角形または楕円形をなす部分
に、金属製芯材の外周の少なくとも一部に形成した多角
形または楕円形をなす部分を嵌着して回り止めし、前記
金属製芯材の上端部を歯根本体の上面より突出させ、該
突出部の外周を多角形または楕円形に形成して上部構造
体の多角形または楕円形穴に嵌着した構造を有すること
を特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a two-piece artificial tooth root consisting of a tooth root body embedded in the jawbone and an upper structure attached to the tooth root body. The main body is made of ceramic, and a hole is provided in the center of the tooth root body at least a part of which is polygonal or oval, and a metal is attached to the polygonal or oval part of the hole. A polygonal or elliptical part formed on at least a part of the outer periphery of the core material is fitted to prevent rotation, and the upper end of the metal core material is made to protrude from the upper surface of the tooth root body, and the protruding part is It is characterized by having a structure in which the outer periphery is formed into a polygonal or elliptical shape and is fitted into a polygonal or elliptical hole of the upper structure.
（作用）
本発明は上記構造を有し、歯根本体の多角形または楕円
形穴部に金属製芯材の外周の多角形部分が嵌着されるか
ら、歯根本体に対して金属製芯材が回り止めされ、また
、金属製芯材の上方への突出部の外周の多角形または楕
円形部に上部構造体の多角形または楕円形穴か嵌着され
ることにより、上部構造体か回り止めされる。また、前
記金属製芯材の上方への突出部は、人工歯根の植設に際
して植設用治具との嵌合部としても作用させつる。(Function) The present invention has the above-mentioned structure, and the polygonal portion on the outer periphery of the metal core material is fitted into the polygonal or elliptical hole of the tooth root body, so that the metal core material is attached to the tooth root body. Also, by fitting the polygonal or oval hole of the upper structure into the polygonal or oval part on the outer periphery of the upwardly protruding part of the metal core, the upper structure can be prevented from rotating. be done. Further, the upwardly protruding portion of the metal core material also functions as a fitting portion with an implantation jig when implanting an artificial tooth root.
（実施例）
第１図は本発明による人工歯根の一実施例を示すものて
、（’Ａ）は平面図、（Ｂ）は縦断面図。(Example) Fig. 1 shows an example of an artificial tooth root according to the present invention, in which ('A) is a plan view and (B) is a longitudinal sectional view.
（Ｃ） 、 ”（Ｄ）はそれぞれ（８）のＥ−Ｅ、Ｆ−
Ｆ断面図である。ｌはセラミック製歯根本体（以下本体
と略す）、２は該本体の金属製芯材： ３は上部構造体
である。(C), ”(D) are E-E and F- of (8), respectively.
It is an F sectional view. 1 is a ceramic tooth root body (hereinafter abbreviated as the main body), 2 is a metal core material of the main body, and 3 is an upper structure.
本体１は、アパタイト（ＨＡＰ）、アルミナ、バイオガ
ラス、ＴＣＰ（リン酸三カルシウム）、デイオフ１サイ
ト、ウィスカー複合アバ゛タイト等のセラミック（樹脂
やガラスを混合したものを含む）からなる”もので、そ
の中心に芯材取付は穴４を有し、該芯材取付は穴４はそ
の上部に設けられる断面か多角形（本例は６角形）をな
す部分４ａと、該多角形穴４ａの下部より取付は穴４の
底部にわたって設けられた断面が円形をなす部分４ｂと
からなる。The main body 1 is made of ceramics (including those mixed with resin and glass) such as apatite (HAP), alumina, bioglass, TCP (tricalcium phosphate), day-off 1 site, and whisker composite abatite. , the core material mounting hole 4 has a hole 4 in its center, and the core material mounting hole 4 has a portion 4a provided at its upper part with a polygonal cross section (hexagonal in this example), and a portion 4a of the polygonal hole 4a. The attachment from the lower part consists of a portion 4b having a circular cross section and extending over the bottom of the hole 4.
三方芯材２は、チタン、チタン合金、ステンレス等・か
らなり、内部に上部構造体３ねじ付は用のねし穴’２−
ａを有する筒状をなすもので、・該芯材・２′の外周は
、前記本体ｌへの嵌着用円形部２ｂと。The three-sided core material 2 is made of titanium, titanium alloy, stainless steel, etc., and has a threaded hole 2 for the upper structure 3 inside.
The outer periphery of the core member 2' is a circular part 2b for fitting into the main body l.
多角形穴４ａに嵌着される第１の多角形部２ｃと、本体
ｌより上部に突出し、かつ第１の多角形部２ｃより大き
な第２の多角形部２ｄとからなる。It consists of a first polygonal part 2c that is fitted into the polygonal hole 4a, and a second polygonal part 2d that projects upward from the main body l and is larger than the first polygonal part 2c.
上部構造体３は、本体ｌの上部に組合わされるもので、
前記芯材２の第２の多角形部２ｄに嵌着される多角形穴
３ａを有する。The upper structure 3 is combined with the upper part of the main body l,
It has a polygonal hole 3a that is fitted into the second polygonal part 2d of the core material 2.
この人工歯根は、セラミックでなる本体ｌの円形穴４ｂ
と多角形穴４ａに、芯材２の円形部２ｂ、第１の多角形
部２ｃをそれぞれ嵌着することにより、芯材２を本体ｌ
に固定し、上部構造体３は、本体ｌの上面より突出した
第２の多角形部２ｄに上部構造体３の多角形穴３ａを嵌
着し、芯材２のねじ穴２ａに螺合するねしく図示せず）
により本′＃ｌに取付ける。This artificial tooth root has a circular hole 4b in a main body l made of ceramic.
By fitting the circular part 2b and the first polygonal part 2c of the core material 2 into the polygonal hole 4a, the core material 2 is attached to the main body l.
The upper structure 3 is fixed to the upper structure 3 by fitting the polygonal hole 3a of the upper structure 3 into the second polygonal part 2d protruding from the upper surface of the main body l, and screwing it into the screw hole 2a of the core material 2. (not shown)
Attach it to the book'#l.
このような構造とすれば１本体ｌの多角形穴４ａと芯材
２の外周の第１の多角形部２ｃとの嵌着により、本体ｌ
に対して芯材２が回り止めされ、また、芯材２の上方へ
の突出部の外周の多角形部２ｄに上部構造体３の多角形
穴３ａか嵌着されることにより、上部構造体３か回り止
めされる。With such a structure, the polygonal hole 4a of the main body l and the first polygonal part 2c on the outer periphery of the core material 2 fit together, so that the main body l
The core member 2 is prevented from rotating, and the polygonal hole 3a of the upper structure 3 is fitted into the polygonal part 2d on the outer periphery of the upwardly protruding part of the core member 2, so that the upper structure The rotation is stopped 3 times.
また、第２の多角形部２ｄと嵌合する形状を有する人工
歯根植設用治具を用いることにより、該多角形部２ｄを
そのまま治具との嵌合部として用いることがてきる。特
に前記の如く、人工歯根本体ｌと金属製芯材２とは、第
１の多角形部２ｃにより回り止めされ、接合されている
のて１人工歯根植設時に強い回転力を第２の多角形部２
ｄに加えても、人工歯根本体ｌと金属製芯材２か剥離し
、回転または破壊するおそれがなく、簡易、強固な治具
嵌合部とすることがてきる。Furthermore, by using an artificial tooth root implantation jig having a shape that fits into the second polygonal part 2d, the polygonal part 2d can be used as it is as a fitting part with the jig. In particular, as mentioned above, the artificial tooth root body l and the metal core material 2 are prevented from rotating by the first polygonal part 2c and are joined together, so that when the first artificial tooth root is implanted, a strong rotational force is applied to the second polygonal part. Square part 2
In addition to d, there is no fear that the artificial tooth root body l and the metal core material 2 will separate, rotate or break, and a simple and strong jig fitting part can be achieved.
前記多角形部２ｃ、２ｄおよび多角形穴３ａ、４ａは、
多角形にかえて楕円形等とすることによっても同等の回
転防止を計ることかでき、適用可能である。The polygonal portions 2c, 2d and polygonal holes 3a, 4a are
The same rotation prevention can be achieved by using an elliptical shape instead of a polygonal shape, which is also applicable.
また、本体１に、顎骨６等に対する生体親和性のあるも
のを用いることにより、生体に対する結合強度か高く、
かつ金属製芯材２により補強された人工歯根が得られる
。本体ｌには、セラミックのうちても特にディオプサイ
ドあるいはアノーサイト（ａｎｏｒｔｈｉｔｅ ）等の
ウィスカーを混入したＨＡＰまたはＴＣＰを用いること
が、生体親和性か高く、かつ強度が大となる点て好まし
い。In addition, by using a material that is biocompatible with the jawbone 6 etc. for the main body 1, the bonding strength to the living body is high.
Moreover, an artificial tooth root reinforced by the metal core material 2 is obtained. Among ceramics, it is particularly preferable to use HAP or TCP mixed with whiskers such as diopside or anorthite for the main body 1 because it has high biocompatibility and high strength.
なお、第１図ＣＢ）において、１ａは顎骨６の頂部に嵌
着するテーパ一部てあり、該テーパ一部ｌａが顎骨６の
緻密骨６ａのテーパー穴６ｂの部分に支持されることに
より、圧縮強度か増大する。また、人工歯根の顎骨頂部
に対応した歯頚部ｌｃの直径を埋め込み部１ｂの直径よ
り大としたので、縦または斜方向から加わった力により
最も大きな応力か生しる部分（本発明者等は、ｔｌ＆密
骨６ａに嵌着される歯頚部に応力か集中することを確認
している）において応力か緩和され、強度の大きな人工
歯根か提供可能になると共に、埋め込み部１ｂの直径か
小となることにより、顎骨６を損なうことかなく、また
、細い顎骨に対しても、人工歯根の植設か容易に行なえ
る。また、顎骨内部における人工歯根の断面積は小てあ
っても、頂部に位置する人工歯根の断面積は確保される
ため、人工歯根に垂直に加わる力による人工歯根のめり
込みか防止される。In FIG. 1 CB), 1a has a tapered part that fits into the top of the jawbone 6, and the tapered part la is supported by the tapered hole 6b of the compact bone 6a of the jawbone 6. Compressive strength increases. In addition, since the diameter of the tooth neck lc corresponding to the jawbone apex of the artificial tooth root was made larger than the diameter of the implanted part 1b, the area where the greatest stress is generated by the force applied from the vertical or oblique direction (the inventors It has been confirmed that stress is concentrated on the neck of the tooth that is fitted into the tl & dense bone 6a), and it is possible to provide a strong artificial tooth root. As a result, the artificial tooth root can be easily implanted even in a thin jawbone without damaging the jawbone 6. Further, even if the cross-sectional area of the artificial tooth root inside the jawbone is small, the cross-sectional area of the artificial tooth root located at the apex is ensured, thereby preventing the artificial tooth root from sinking due to a force applied perpendicularly to the artificial tooth root.
また、本実施例においては、第１図（Ｂ）に示すように
、埋め込み部１ｂの外周に螺旋状の突起ｌｄを設けてお
り、これにより人工歯根の抜は止めかなされるようにし
ているか、抜は止めや回り止め構造としては、突起や溝
あるいは穴の形成を採用しても良い、また、セラミツつ
てなる本体ｌと芯材２との結合は、超塑性加工（所定の
粒径の粉体を加熱状態で加圧成形する）により行なって
も良い。Furthermore, in this embodiment, as shown in FIG. 1(B), a spiral protrusion ld is provided on the outer periphery of the embedded portion 1b, thereby preventing or stopping the extraction of the artificial tooth root. The formation of protrusions, grooves, or holes may be used as the pull-out or rotation prevention structure.In addition, the bond between the ceramic body 1 and the core material 2 may be formed by superplastic processing (with a predetermined grain size). The molding may also be carried out by press-molding the powder in a heated state.
第２図（Ａ）は本発明の他の実施例を示す平面図、同（
１３）はその縦断面図であり、本実施例が第１図の実施
例と異なるところは、芯材２の上部形状のみてあり、芯
材２の上部を、多角形穴４ａに嵌着する部分２ｃを延長
させて突出させた形状にしだものである０本実施例は、
芯材２の加工か第１図の芯材より容易となるか、植設用
治具との嵌合の安定性、安定性の意味、また、上部構造
体３を回り止めする意味では、第１図のように多角形部
２ｄか大きくした形状とした方が回り止め効果か大であ
る。FIG. 2(A) is a plan view showing another embodiment of the present invention;
13) is a longitudinal cross-sectional view of the same, and the difference between this embodiment and the embodiment shown in FIG. In this embodiment, the portion 2c is extended and protruded.
The processing of the core material 2 is easier than the core material shown in FIG. The anti-rotation effect is greater when the polygonal portion 2d is made larger as shown in Fig. 1.
第３図は本考案の他の実施例であり、本体ｌの取付は穴
を全長にわたり多角形穴４ａとし、かつ芯材２も全長に
わたり外周を多角形２ｃに形成して嵌着したものである
。本実施例は芯材２の加工か容易となる利点かある。Fig. 3 shows another embodiment of the present invention, in which the main body l is mounted with a polygonal hole 4a extending over its entire length, and the core material 2 is also fitted with its outer periphery formed into a polygonal shape 2c over its entire length. be. This embodiment has the advantage that the core material 2 can be easily processed.
第４図は本発明により構成される人工歯の一例を示す縦
断面図てあり、前記芯材２のねし穴２ａに螺合される歯
根用ねし７により、歯頚部用リング８（８ａは芯材２の
外周の多角形部２Ｃに嵌着される多角形穴である）と内
冠下部リング９か芯材２および本体ｌに固定され、歯根
用ねし７の中心に上方より設けたねし穴７ａに、歯冠１
０に一体にモールドした歯冠用ねし１１か、内冠１２を
貫通して螺合されることにより、人工歯か構成されてい
る。なお、歯根用ねじ７および歯冠用ねし１１はチタン
、歯頚部用リング８はセラミックまたはチタン、内冠下
部リンク９はチタン、歯冠ｌＯはポーセレン、白金化合
またはポリマー、内冠１２はチタン、白金化合またはポ
リマーによりそれぞれ製作される０本考案により構成さ
れる人工歯は、この例に示されるものに限定されるもの
でないことは云うまでもない。FIG. 4 is a longitudinal sectional view showing an example of an artificial tooth constructed according to the present invention, in which a tooth neck ring 8 (8a is a polygonal hole that is fitted into the polygonal part 2C on the outer periphery of the core material 2) and the inner crown lower ring 9 is fixed to the core material 2 and the main body l, and is provided from above at the center of the tooth root screw 7. Tooth hole 7a, tooth crown 1
An artificial tooth is constructed by screwing the tooth crown screw 11 integrally molded with the inner crown 12 into the inner crown 12. The tooth root screw 7 and the crown screw 11 are made of titanium, the tooth neck ring 8 is made of ceramic or titanium, the inner crown lower link 9 is made of titanium, the tooth crown 10 is made of porcelain, a platinum compound or polymer, and the inner crown 12 is made of titanium. It goes without saying that the artificial teeth constructed according to the present invention, which are made of platinum compounds, platinum compounds, or polymers, are not limited to those shown in this example.
本発明を実施する場合、嵌着部の結合強度を高めるため
、嵌着部に接着剤を施す等の付加を行なっても良い。When carrying out the present invention, additions such as applying an adhesive to the fitting portion may be applied in order to increase the bonding strength of the fitting portion.
（発明の効果）
本発明によれば、セラミック製本体の多角形または楕円
形穴に金属製芯材の多角形または楕円形の外周部を嵌着
して結合する構造としたので、金属製芯材の回り止めが
なされると共に、金属製芯材の突出部外周の多角形また
は楕円形部に上部構造体を嵌着する構造としたので、上
部構造体の回り止めもなされ、回転のおそれのない人工
歯根が提供できる。(Effects of the Invention) According to the present invention, the polygonal or oval outer circumferential portion of the metal core material is fitted into the polygonal or oval hole of the ceramic main body for coupling. In addition to preventing the upper structure from rotating, the upper structure is fitted into the polygonal or elliptical outer circumference of the protrusion of the metal core, which prevents the upper structure from rotating. No artificial tooth roots can be provided.
また、金属製芯材の突出部の多角形部と嵌合する形状を
有する人工歯根植設用治具を用いることにより、該多角
形部をそのまま治具との嵌合部として用いることができ
る。そして、人工歯根本体と金属製芯材とは、多角形部
または楕円形部により回り止めされ、接合されているの
て、人工歯根植設時に強い回転力を金属製芯材に加えて
も、人工歯根本体と金属製芯材が剥離し１回転または破
壊するおそれがなく、簡易、強固な治具嵌合部とするこ
とができる。Furthermore, by using an artificial tooth root implantation jig having a shape that fits into the polygonal part of the protruding part of the metal core material, the polygonal part can be used as it is as the fitting part with the jig. . Since the artificial tooth root body and the metal core material are joined and prevented from rotating by the polygonal or elliptical part, even if a strong rotational force is applied to the metal core material during implantation of the artificial tooth root, There is no fear that the artificial tooth root body and the metal core material will separate and break during one rotation, and a simple and strong jig fitting part can be obtained.
また、金属製芯材により歯根本体の強度が大となり、か
つ該金属製芯材に上部構造体が結合されるので、全体と
して強度の大なる人工歯根か提供できる。Further, the strength of the tooth root body is increased by the metal core material, and the upper structure is bonded to the metal core material, so that an artificial tooth root with high strength as a whole can be provided.
第１図（Ａ）は本発明による人工歯根の一実施例を示す
平面図、同（Ｂ）はその縦断面図、同（Ｃ）。
同（Ｄ）はそれぞれ同（８）のＥ−Ｅ、Ｆ−Ｆ断面図、
第２図（Ａ）は本発明による人工歯根の他の実施例を示
す平面図、同（Ｂ）はその縦断面図、第３図（Ａ）は本
発明による人工歯根の他の実施例を示す平面図、同（Ｂ
）はその縦断面図、第４図は本発明による人工歯根によ
り構成される人工歯の一例を示す縦断面図である。
ｌ：歯根本体、２：金属製芯材、２ａ：ねし穴、２ｂ二
円形部、２ｃ、２ｄ：多角形部、３：上部構造体、３ａ
：多角形穴、４：取付は穴、４ａ：多角形穴、４ｂ＝円
形穴、６：顎骨、７：歯根用ねし、８：歯頚部用リング
、９：内冠下部リング、１０：歯冠、ｌｌ：歯冠用ねし
、１２：内冠FIG. 1(A) is a plan view showing an embodiment of an artificial tooth root according to the present invention, FIG. 1(B) is a longitudinal cross-sectional view thereof, and FIG. (D) is a cross-sectional view of E-E and F-F of (8), respectively.
FIG. 2(A) is a plan view showing another embodiment of the artificial tooth root according to the present invention, FIG. 2(B) is a longitudinal sectional view thereof, and FIG. 3(A) is a plan view showing another embodiment of the artificial tooth root according to the present invention. Plan view shown, same (B
) is a longitudinal sectional view thereof, and FIG. 4 is a longitudinal sectional view showing an example of an artificial tooth constructed from an artificial tooth root according to the present invention. l: tooth root body, 2: metal core material, 2a: tapped hole, 2b bicircular part, 2c, 2d: polygonal part, 3: upper structure, 3a
: polygonal hole, 4: mounting hole, 4a: polygonal hole, 4b = circular hole, 6: jawbone, 7: tooth root screw, 8: tooth neck ring, 9: inner crown lower ring, 10: tooth Crown, ll: tooth crown, 12: inner crown
Claims (1)
れる上部構造体とからなる２ピース型人工歯根において
、前記歯根本体をセラミックにより構成し、前記歯根本
体の中心に少なくとも一部を多角形または楕円形とした
芯材取付け穴を設け、該芯材取付け穴の多角形または楕
円形をなす部分に、金属製芯材の外周の少なくとも一部
に形成した多角形または楕円形をなす部分を嵌着して回
り止めし、前記金属製芯材の上端部を歯根本体の上面よ
り突出させ、該突出部の外周を多角形または楕円形に形
成して上部構造体の多角形または楕円形穴に嵌着した構
造を有することを特徴とする人工歯根。In a two-piece artificial tooth root consisting of a tooth root body embedded in the jawbone and an upper structure attached to the tooth root body, the tooth root body is made of ceramic, and at least a part of the tooth root body is formed in the center of the tooth root body in a polygonal or elliptical shape. A shaped core mounting hole is provided, and a polygonal or elliptical part formed on at least a part of the outer periphery of the metal core is fitted into the polygonal or elliptical part of the core mounting hole. The upper end portion of the metal core member is made to protrude from the upper surface of the tooth root body, and the outer periphery of the protrusion portion is formed into a polygonal or elliptical shape, and the upper end portion of the metal core member is formed into a polygonal or elliptical shape, and is fitted into the polygonal or elliptical hole of the upper structure. An artificial tooth root characterized by having a fixed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2212673A JPH0496745A (en) | 1990-08-11 | 1990-08-11 | Artificial tooth root |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2212673A JPH0496745A (en) | 1990-08-11 | 1990-08-11 | Artificial tooth root |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0496745A true JPH0496745A (en) | 1992-03-30 |
Family
ID=16626508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2212673A Pending JPH0496745A (en) | 1990-08-11 | 1990-08-11 | Artificial tooth root |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0496745A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435723A (en) * | 1993-08-18 | 1995-07-25 | O'brien; Gary R. | Endosseous dental implant system |
| US5772437A (en) * | 1993-12-20 | 1998-06-30 | Nobel Biocare Ab | Securing element |
-
1990
- 1990-08-11 JP JP2212673A patent/JPH0496745A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435723A (en) * | 1993-08-18 | 1995-07-25 | O'brien; Gary R. | Endosseous dental implant system |
| US5772437A (en) * | 1993-12-20 | 1998-06-30 | Nobel Biocare Ab | Securing element |
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