JP4624526B2 - Titanium magnet crown system implant with shock absorber - Google Patents

Titanium magnet crown system implant with shock absorber Download PDF

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JP4624526B2
JP4624526B2 JP2000190313A JP2000190313A JP4624526B2 JP 4624526 B2 JP4624526 B2 JP 4624526B2 JP 2000190313 A JP2000190313 A JP 2000190313A JP 2000190313 A JP2000190313 A JP 2000190313A JP 4624526 B2 JP4624526 B2 JP 4624526B2
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crown
cushioning material
inner crown
magnet
implant
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JP2002000625A (en
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巧 東風
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巧 東風
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Description

【０００１】
【発明の属する技術分野】
本発明は歯科用義歯に関するものであって、チタン・マグネット・クラウンシステム(以下、ＴＭＣＳという)すなわち患者可撤式(ＴＭＣＳ)の補綴装置、特に天然歯とインプラントとを土台とする義歯を作成するために、オステオインテグレートしたインプラントが生体力学的調和をもち天然歯と連結した状態で生体適合しながら可及的に長く機能する緩衝機構を備えたＴＭＣＳ用インプラントに関する。
【０００２】
【従来の技術】
インプラントの長期間にわたる良好な予後にはインプラント材料の生体適合性はもちろん、生体とインプラントシステムにおける生体力学的な調和も重要な因子の一つである。骨−インプラント界面でのオステオインテグレーションが組織学的に解明され、リモデリング(骨改造)も含み、そのbone formationのメカニズムが明確にされてきている。インプラント埋入後、インプラント体への過重負荷を避けることによりオステオインテグレーションを得ることができ、その後の適切な咬合荷重は、骨のリモデリングを起こす。インプラント体の支持機構は天然歯と異なり、歯根膜はない。インプラントの恒常性を保つためには、埋入されたインプラントの材質的生体適合性とインプラントの力学的動態が重要となる。この生体力学的とは、生体内でいかに調和した力学的な機能性を持つかである。Biofunctionality(生体機能性)とは、インプラントの機能を適切に発揮させるための機械的、生体的適合性と定義されているが不適切な咬合や不適合な修復物により、インプラント周囲の骨のマイクロ破折を起こし、細菌感染を誘発し、骨の消失を起こす。したがって、機械的な生体的特性を変えることにより、インプラント周囲骨への応力の集中を避けることが必要である。オステオインテグレーテッド・インプラントは１００％の骨支持ではないが、歯根膜を有する天然歯とは異なる組織学的構造である。それゆえ、修復に際してはこれに対応する配慮が必要である。
【０００３】
天然歯とインプラントの荷重時偏位量を比較した。天然歯は歯根膜(２０〜１００ミクロン)が存在するため、荷重を付与することにより、２段階の動き、Ｄ１＝100N／ｍｍ、Ｄ２＝1000N／ｍｍを示し、これに対してオステオインテグレーテッド・インプラントでは、その偏位は歯よりも小さく、Ｄ１＝10,000N／ｍｍと天然歯に比較して、10倍から１００倍であるとしている(図６及び図７参照)。したがって、両者を同一の口腔内で適切に機能させるためには、これらの動きを調和させる必要があり、インプラントに緩衝機構が必要となる。
【０００４】
従来のＩＭＺ(Intramobil Zylinder；内部可動性シリンダー型 )インプラントは、咬合力のインプラント周囲骨への伝達様式を、天然歯と類似させ、また衝撃力に対してインプラント周囲骨への応力を緩衝させるため、インプラント体内部に歯根膜の動きを模倣した内部可動機構(intramobile element)を組み込んでいる。内部可動機構は粘弾性のあるpolyoxymethylene(POM)からできており、垂直的、水平的な天然歯の動きを模倣している。しかし、ＩＭＺインプラントにおいての問題点もある。
【０００５】
【発明が解決しようとする課題】
従来のＩＭＺインプラントは緩衝部分の固定がネジ止めであるので十分な緩衝が得られない。また可動と緩衝を十分発揮させるには球形の土台の上に緩衝部分を乗せればよいが、緩衝部分の回転が生じて外側に覆っている内冠の位置のズレが生じることとなる。
【０００６】
本発明は上記の点に鑑みてなされたもので、その目的とするところは、緩衝部分の緩衝機能が十分得られるようにし、咬合圧に対して内冠の位置ズレが生じないようにし、かつ緩衝部分の回転、浮き上りのズレが生じることがなく、緩衝量を調節できるようにした内部可動の緩衝機構を備えたＴＭＣＳ用インプラントを提供することにある。
【０００７】
【課題を解決するための手段】
本発明に係る緩衝機構を備えたチタン・マグネット・クラウンシステム用インプラントは、人工義歯である外冠の内側に磁石構造体を埋め込み、該外冠の内側に内冠を密着嵌合し、該内冠の天面に前記磁石構造体と吸着するキーパーを備えるとともに該内冠内に、緩衝機能を備えた粘弾性のあるポリオキシメチレンからなるキャップ状の緩衝材を密着嵌合し、かつ内冠の緩衝材に対する嵌合力は磁石の限界吸引力以上に嵌合し、該内冠は緩衝材に対し着脱自在な嵌合であり、該緩衝材の下部外周に水平方向に延出する鍔部を形成し、該鍔部で内冠下端又は内外冠下端を当接させて支承し、該緩衝材の内側に入口部が狭窄し内部に平面矩形状空間を形成し、支台歯であるインプラント体上面に首部を有する平面矩形突起を一体形成し、該平面矩形突起を前記緩衝材の平面矩形状空間に密着嵌合せしめるとともに前記平面矩形突起の脱着が容易となるように該緩衝材に切込みを形成したものである。
【０００８】
また本発明に係る緩衝機構を備えたチタン・マグネット・クラウンシステム用インプラントは、人工義歯である外冠の内側に磁石構造体を埋め込み、該外冠の内側に内冠を密着嵌合し、該内冠の天面に前記磁石構造体と吸着するキーパーを備えるとともに該内冠内に、緩衝機能を備えた粘弾性のあるポリオキシメチレンからなるキャップ状の緩衝材を密着嵌合し、かつ内冠の緩衝材に対する嵌合力は磁石の限界吸引力以上に嵌合し、該内冠は緩衝材に対し着脱自在な嵌合であり、該緩衝材の下部外周に水平方向に延出する鍔部を形成し、該鍔部で内冠下端又は内外冠下端を当接させて支承し、該緩衝材の内側に入口部が狭窄し内部に平面矩形状空間を形成し、支台歯であるインプラント体上面に首部を有する平面矩形突起を分離結合可能に形成し、該平面矩形突起を前記緩衝材の平面矩形状空間に密着嵌合せしめるとともに前記平面矩形突起の脱着が容易となるように該緩衝材に切込みを形成したものである。
【０００９】
【発明実施の形態】
１は人工義歯である外冠を示す。外冠１の内側に磁石構造体２を埋め込む。磁石構造体２は既存の構造体であり、例えば希土類磁石の一つであるサマリウム・コバルト磁石あるいはネオジウム磁石等が使用され、直方体形状をしており、両側を磁気回路を形成する磁性ステンレス鋼のヨークでサンドイッチ状に挟み、下面を除く表面を非磁性ステンレス鋼のキャップで被覆する構造である。３は外冠１の内側に密着嵌合する内冠で、その内冠３の天面には磁性ステンレス鋼のキーパーが表面に露出する如くしてを埋設する構造、あるいは内冠３自体がキーパー４の役割を兼ね備えた一体型にステンレス鋼で造るかのいずれであってもよい。
内冠３の緩衝材５に対する嵌合力は磁石構造体２の限界吸引力以上に強く嵌合しており、その内冠３は緩衝材５に対し着脱自在な嵌合構造であることが特徴である。これによって従来の固定式の内冠に比べて緩衝材の定期点検、交換が容易に行なわれる。本例では内冠３の下端部内側に数箇所のボッチ(弧状突起)３ａを形成し、この ボッチ３ａに対応して嵌合する緩衝材５下部外周箇所に窪み部５ｂを形成した場合を示したが他の手段で固定してもよい。なお、外冠１と内冠３は既製作るようにしてもよい。
【００１０】
内冠３の内部には緩衝機能を備えた粘弾性のあるポリオキシメチレンからなるキャップ状の緩衝材５を密着嵌合させる。緩衝材５の内側には入口部が狭窄し内部に平面矩形状空間５ａを形成する。また緩衝材５の下部外周には水平方向に延出する鍔部５ｃを形成し、この鍔部５ｃで内冠３下端又は内外冠下端を当接させて支承する。支台歯であるチタン等の材料からなる棒状のインプラント体６の上面には首部６ａを有する平面矩形突起６ｂを一体に形成する。インプラント体６の上面に形成した平面矩形突起６ｂは緩衝材５の平面矩形状空間５ａに密着嵌合せしめるとともにその緩衝材５の下部外周面に内冠３の下端部を当接せしめる構造とする。５ｄは緩衝材５に形成した切込みで、この切込み５ｄによって平面矩形突起６ｂに対する緩衝材５の脱着が容易になし得ることとなる。
【００１１】
本実施例において、インプラント体６の上面に首部６ａを介して平面矩形突起６ｂ一体に形成した一回法インプラント埋入術式について述べたが、必ずしもこの構造に限定されるものではなく、二回法インプラント埋入術式については、一回法インプラント埋入術式のように棒状のインプラント６の上面に首部６ａを有する平面矩形突起６ｂを一体に形成するのではなく、支台歯であるインプラント体６の上面に、首部を有する平面矩形突起６ｃをネジ等によって分離結合可能に形成する。
【００１２】
【発明の効果】
本発明は上記の説明から判るように、内冠に対する緩衝材の固定がネジ止めではないので、十分な緩衝が期待できる。緩衝材は入口部が狭窄し内部に平面矩形状空間を形成した、いわゆるアンダーカット内に入り込む構造であり、その緩衝材を内冠により覆うことにより、密着嵌合させるので、外冠は緩衝材の緩衝機能によって十分な可動と緩衝が期待できる。その結果、従来、困難視されていた天然歯とインプラントとを連結してここに人工義歯を装着することができる。
【００１３】
外冠の可動と緩衝を十分発揮させるには球形の土台(インプラント体の上部に形成する部分)の上に緩衝材を乗せればよいが、その球形部分で緩衝材が回転してしまい、内冠と外冠の位置関係にズレが生じるので、土台部分を矩形にすることにより、咬合圧に対して、内外冠の位置のズレが解消される。
【００１４】
緩衝材は従来のように内冠に対して固定式ではなく、取り外し可能な密着嵌合型構造であるので、緩衝材の定期的な点検、交換が可能となり、しかも緩衝材は回転と浮き上りのズレを生じることがない。緩衝材は材料の硬度によって、緩衝量を調節することができる。さらに、平面矩形突起の脱着が容易となるように該緩衝材に切込みを形成したので、平面矩形突起に対する緩衝材の脱着が容易になし得ることとなる。
【図面の簡単な説明】
【図１】（ａ）は本発明の一実施例を示す一回法インプラント埋入式用のインプラント拡大断面図、（ｂ）は本発明に係る外冠と内冠と緩衝材との嵌合後の拡大断面図である。
【図２】本発明に係る内冠と緩衝材との嵌合前の拡大側面図である。
【図３】本発明に係る緩衝材の拡大底面図である。
【図４】本発明の他の実施例を示す二回法インプラント埋入式用のインプラント拡大断面図である。
【図５】本発明の他の実施例を示す二回法インプラント埋入式用の前歯部用で角度を変えることのできるインプラント拡大断面図である。
【図６】垂直荷重での天然歯の動きを示す図である。
【図７】垂直荷重でのオステオインテグレーテッド・インプラントの動きを示す図である。
【図８】ＩＭＣと天然歯との内部可動機構の動きを示す図である。
【符号の説明】
１ 外冠 ２ 磁石構造体
３ 内冠 ３ａ ボッチ(弧状突起)
４ キーパー
５ 粘弾性のあるポリオキシメチレンからなるキャップ状の緩衝材
５ａ 平面矩形状空間 ５ｂ 窪み部
５ｃ 鍔部 ５ｄ 切り込み
６ インプラント体 ６ａ 首部
６ｂ 一体に形成した平面矩形突起
６ｃ 分離結合可能に形成した平面矩形突起[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dental denture, and creates a titanium-magnet-crown system (hereinafter referred to as TMCS), that is, a patient removable type (TMCS) prosthetic device, particularly a denture based on natural teeth and an implant. Therefore, the present invention relates to an implant for TMCS having a buffer mechanism that functions as long as possible while being biocompatible in a state in which the osteointegrated implant has biomechanical harmony and is connected to natural teeth.
[0002]
[Prior art]
In addition to the biocompatibility of the implant material, the biomechanical harmony between the living body and the implant system is also an important factor for a good prognosis over a long period of time. Osteointegration at the bone-implant interface has been elucidated histologically, including remodeling (bone remodeling), and the mechanism of bone formation has been clarified. After implant placement, osteointegration can be obtained by avoiding overloading of the implant body, and subsequent proper occlusal loading causes bone remodeling. The support mechanism of the implant body is different from natural teeth and has no periodontal ligament. In order to maintain the homeostasis of the implant, the material biocompatibility of the implanted implant and the mechanical dynamics of the implant are important. This biomechanical is how to have harmonized mechanical functionality in the living body. Biofunctionality is defined as mechanical and biocompatibility for the proper functioning of the implant, but due to improper occlusion and incompatible restorations, Causes folds, induces bacterial infections and causes bone loss. Therefore, it is necessary to avoid stress concentration on the bone surrounding the implant by changing the mechanical biological properties. Osteointegrated implants are not 100% bone support, but are histological structures different from natural teeth with periodontal ligament. Therefore, it is necessary to consider this when repairing.
[0003]
The displacement amount of natural teeth and implants was compared. Since natural teeth have a periodontal ligament (20 to 100 microns), by applying a load, two steps of movement, D 1 = 100 N / mm, D 2 = 1000 N / mm, are shown. In the Ted implant, the displacement is smaller than that of the tooth, and D 1 = 10,000 N / mm, which is 10 to 100 times that of the natural tooth (see FIGS . 6 and 7 ). Therefore, in order for both to function properly in the same oral cavity, it is necessary to coordinate these movements, and a cushioning mechanism is required for the implant.
[0004]
Conventional IMZ (Intramobil Zylinder) implants are similar to natural teeth in transmitting the occlusal force to the bone around the implant and to buffer the stress on the bone around the implant against impact force An internal mobile mechanism that imitates the movement of the periodontal ligament is incorporated in the implant body. The internal moving mechanism is made of viscoelastic polyoxymethylene (POM), imitating vertical and horizontal natural tooth movement. However, there are also problems with IMZ implants.
[0005]
[Problems to be solved by the invention]
In the conventional IMZ implant, since the buffer portion is fixed by screwing, sufficient buffering cannot be obtained. Further, in order to sufficiently exhibit the movement and buffering, the buffering part may be placed on the spherical base, but the buffering part is rotated and the inner crown covering the outside is displaced.
[0006]
The present invention has been made in view of the above points, and the object of the present invention is to sufficiently obtain a buffering function of the buffering portion, to prevent a positional deviation of the inner crown from the occlusal pressure, and An object of the present invention is to provide an implant for TMCS provided with an internally movable buffer mechanism in which a buffer amount can be adjusted without causing a buffer part to rotate or to be lifted.
[0007]
[Means for Solving the Problems]
The titanium-magnet-crown system implant provided with the buffer mechanism according to the present invention has a magnet structure embedded inside the outer crown, which is an artificial denture, and the inner crown is tightly fitted inside the outer crown. A cap-like cushioning material made of viscoelastic polyoxymethylene having a buffering function is closely fitted in the inner crown, and the inner crown is provided with a keeper that adsorbs the magnet structure on the top surface of the crown. The fitting force with respect to the cushioning material fits more than the limit attractive force of the magnet, and the inner crown is a detachable fitting with respect to the cushioning material , and a flange extending horizontally in the lower outer periphery of the cushioning material An implant body which is formed and supported by contacting the lower end of the inner crown or the inner and outer crowns with the buttocks, and the entrance portion is narrowed inside the cushioning material to form a planar rectangular space therein. A flat rectangular protrusion having a neck on the upper surface is integrally formed, and the flat rectangular It is a protrusion that forms a cut in the cushion the desorption is facilitated of the planar rectangular protrusion with allowed to fitting engagement in close contact with the flat rectangular space of the buffer material.
[0008]
An implant for a titanium-magnet-crown system provided with a buffer mechanism according to the present invention has a magnet structure embedded inside an outer crown, which is an artificial denture, and an inner crown is tightly fitted inside the outer crown , provided with a keeper to adsorb said magnet structure on the top surface of the inner crown in the inner crown, fitted in close contact with the cap-like cushioning material made of polyoxymethylene with viscoelastic having a cushioning function, in and The fitting force of the crown with respect to the buffer material is more than the limit attractive force of the magnet, and the inner crown is a detachable fitting with respect to the buffer material , and the flange extends horizontally on the lower outer periphery of the buffer material The lower end of the inner crown or the lower end of the inner and outer crowns is abutted and supported by the buttocks, and the entrance portion is narrowed inside the cushioning material to form a planar rectangular space inside, and the implant is an abutment tooth form a planar rectangular projection having a neck portion to the body upper surface detachably coupled And, in which the said plane rectangular projection to form a cut in the cushion the desorption of the plane rectangular projection is facilitated with allowed to contact fitting in a planar rectangular space of the buffer material.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 shows the outer crown which is an artificial denture. A magnet structure 2 is embedded inside the outer crown 1. The magnet structure 2 is an existing structure. For example, a samarium / cobalt magnet or a neodymium magnet, which is one of rare earth magnets, is used, and has a rectangular parallelepiped shape. The structure is sandwiched between yokes and covered with a nonmagnetic stainless steel cap on the surface except the lower surface. Reference numeral 3 denotes an inner crown that closely fits inside the outer crown 1, and a structure in which a magnetic stainless steel keeper is buried on the top surface of the inner crown 3, or the inner crown 3 itself is a keeper. It may be any of an integral type having four roles and made of stainless steel.
The fitting force of the inner crown 3 with respect to the cushioning material 5 is stronger than the limit attractive force of the magnet structure 2, and the inner crown 3 has a fitting structure that is detachable with respect to the cushioning material 5. is there. This makes it easier to periodically check and replace the cushioning material than a conventional fixed inner crown. This example shows a case where several bottoms (arc-shaped projections) 3a are formed inside the lower end of the inner crown 3, and a recess 5b is formed at the outer periphery of the lower portion of the cushioning material 5 to be fitted in correspondence with the bottom 3a. However, it may be fixed by other means. The outer crown 1 and the inner crown 3 may be already manufactured.
[0010]
A cap-shaped cushioning material 5 made of viscoelastic polyoxymethylene having a cushioning function is closely fitted in the inner crown 3. The entrance portion is narrowed inside the cushioning material 5 to form a planar rectangular space 5a. Further, a flange portion 5c extending in the horizontal direction is formed on the outer periphery of the lower portion of the cushioning material 5, and the lower end of the inner crown 3 or the lower end of the inner and outer crowns is brought into contact with and supported by the flange portion 5c. A planar rectangular protrusion 6b having a neck portion 6a is integrally formed on the upper surface of a rod-shaped implant body 6 made of a material such as titanium which is an abutment tooth. The planar rectangular protrusion 6b formed on the upper surface of the implant body 6 is closely fitted into the planar rectangular space 5a of the cushioning material 5 and the lower end of the inner crown 3 is brought into contact with the lower outer peripheral surface of the cushioning material 5. . Reference numeral 5d denotes a cut formed in the buffer material 5, and the cut material 5d can be easily attached to and detached from the flat rectangular protrusion 6b.
[0011]
In the present embodiment, the one-time implant placement method in which the planar rectangular protrusion 6b is integrally formed on the upper surface of the implant body 6 via the neck portion 6a has been described, but the present invention is not necessarily limited to this structure. As for the method of implanting an implant, an implant which is an abutment tooth, instead of integrally forming a planar rectangular protrusion 6b having a neck portion 6a on the upper surface of a rod-like implant 6 as in the one-time implant implanting method. A flat rectangular protrusion 6c having a neck portion is formed on the upper surface of the body 6 so as to be separable by screws or the like.
[0012]
【The invention's effect】
In the present invention, as can be seen from the above description, since the buffer material is not fixed to the inner crown by screwing, sufficient buffering can be expected. Buffer material inlet portion to form a flat rectangular shape space therein and stenosis, a structure entering the so-called undercut, by covering the inner crown the cushioning material, adhesion fitted so Runode, outer crown buffer Sufficient movement and buffering can be expected by the buffering function of the material. As a result, it is possible to connect a natural tooth and an implant, which have conventionally been regarded as difficult, and attach an artificial denture here.
[0013]
In order to fully exhibit the movement and buffering of the outer crown, it is only necessary to place the buffering material on a spherical base (the part formed on the upper part of the implant body), but the buffering material rotates on the spherical part, Since the positional relationship between the crown and the outer crown is shifted, the positional shift of the inner and outer crowns is eliminated with respect to the occlusal pressure by making the base portion rectangular.
[0014]
The shock-absorbing material is not fixed to the inner crown as in the past, but has a removable close-fitting structure, so that the shock-absorbing material can be periodically inspected and replaced. There will be no deviation. The amount of buffering material can be adjusted according to the hardness of the material. Furthermore, since the buffer material is cut so that the flat rectangular protrusion can be easily detached, the buffer material can be easily detached from the flat rectangular protrusion.
[Brief description of the drawings]
FIG. 1A is an enlarged sectional view of an implant for a one-time implant placement type showing an embodiment of the present invention, and FIG. 1B is a fitting of an outer crown, an inner crown and a cushioning material according to the present invention. It is a subsequent expanded sectional view.
FIG. 2 is an enlarged side view before the inner crown and the cushioning material according to the present invention are fitted together.
FIG. 3 is an enlarged bottom view of the cushioning material according to the present invention.
FIG. 4 is an enlarged cross-sectional view of a two-time implant placement type implant according to another embodiment of the present invention.
FIG. 5 is an enlarged cross-sectional view of an implant capable of changing an angle for an anterior tooth portion for a two-time implant placement type according to another embodiment of the present invention.
FIG. 6 is a diagram showing the movement of a natural tooth under a vertical load.
FIG. 7 shows the motion of an osteointegrated implant under normal load.
FIG. 8 is a diagram showing the movement of the internal movable mechanism between the IMC and the natural tooth.
[Explanation of symbols]
1 outer crown 2 magnet structure 3 inner crown 3a bocce (arc-shaped projection)
4 Keeper 5 Cap-shaped cushioning material 5a made of viscoelastic polyoxymethylene 5a Planar rectangular space 5b Recessed part 5c Gutter part 5d Cut 6 Implant body 6a Neck part 6b Flat rectangular protrusion 6c integrally formed Formed so as to be separable Flat rectangular protrusion

Claims (2)

人工義歯である外冠の内側に磁石構造体を埋め込み、該外冠の内側に内冠を密着嵌合し、該内冠の天面に前記磁石構造体と吸着するキーパーを備えるとともに該内冠内に、緩衝機能を備えた粘弾性のあるポリオキシメチレンからなるキャップ状の緩衝材を密着嵌合し、かつ内冠の緩衝材に対する嵌合力は磁石の限界吸引力以上に嵌合し、該内冠は緩衝材に対し着脱自在な嵌合であり、該緩衝材の下部外周に水平方向に延出する鍔部を形成し、該鍔部で内冠下端又は内外冠下端を当接させて支承し、該緩衝材の内側に入口部が狭窄し内部に平面矩形状空間を形成し、支台歯であるインプラント体上面に首部を有する平面矩形突起を一体形成し、該平面矩形突起を前記緩衝材の平面矩形状空間に密着嵌合せしめるとともに前記平面矩形突起の脱着が容易となるように該緩衝材に切込みを形成したことを特徴とする緩衝機構を備えたチタン・マグネット・クラウンシステム用インプラント。A magnet structure is embedded inside the outer crown, which is an artificial denture, the inner crown is tightly fitted inside the outer crown, and a keeper that attracts the magnet structure is provided on the top surface of the inner crown. A cap-shaped cushioning material made of viscoelastic polyoxymethylene having a cushioning function is tightly fitted inside, and the fitting force of the inner crown to the cushioning material is more than the limit attractive force of the magnet, The inner crown is a detachable fitting with respect to the cushioning material , and a collar portion extending in the horizontal direction is formed on the outer periphery of the lower portion of the cushioning material , and the lower end of the inner crown or the inner and outer crowns is brought into contact with the collar portion. The inlet portion is narrowed inside the cushioning material to form a planar rectangular space inside, and a planar rectangular protrusion having a neck portion is integrally formed on the upper surface of the implant body which is an abutment tooth. desorption of the planar rectangular protrusion with allowed to contact fitting in a planar rectangular space of the buffer material Titanium Magnet Crown system implants having a buffer mechanism, characterized in that the formation of the cuts to the cushioning material so as to facilitate. 人工義歯である外冠の内側に磁石構造体を埋め込み、該外冠の内側に内冠を密着嵌合し、該内冠の天面に前記磁石構造体と吸着するキーパーを備えるとともに該内冠内に、緩衝機能を備えた粘弾性のあるポリオキシメチレンからなるキャップ状の緩衝材を密着嵌合し、かつ内冠の緩衝材に対する嵌合力は磁石の限界吸引力以上に嵌合し、該内冠は緩衝材に対し着脱自在な嵌合であり、該緩衝材の下部外周に水平方向に延出する鍔部を形成し、該鍔部で内冠下端又は内外冠下端を当接させて支承し、該緩衝材の内側に入口部が狭窄し内部に平面矩形状空間を形成し、支台歯であるインプラント体上面に首部を有する平面矩形突起を分離結合可能に形成し、該平面矩形突起を前記緩衝材の平面矩形状空間に密着嵌合せしめるとともに前記平面矩形突起の脱着が容易となるように該緩衝材に切込みを形成したことを特徴とする緩衝機構を備えたチタン・マグネット・クラウンシステム用インプラント。A magnet structure is embedded inside the outer crown, which is an artificial denture, the inner crown is tightly fitted inside the outer crown, and a keeper that attracts the magnet structure is provided on the top surface of the inner crown. A cap-shaped cushioning material made of viscoelastic polyoxymethylene having a cushioning function is tightly fitted inside, and the fitting force of the inner crown to the cushioning material is more than the limit attractive force of the magnet, The inner crown is a detachable fitting with respect to the cushioning material , and a collar portion extending in the horizontal direction is formed on the outer periphery of the lower portion of the cushioning material , and the inner crown lower end or the inner and outer crown lower end is brought into contact with the collar portion. The entrance portion is narrowed inside the cushioning material to form a planar rectangular space inside, and a planar rectangular protrusion having a neck portion is formed on the upper surface of the implant body that is an abutment tooth so as to be separable and coupled. the plane rectangular with allowed to contact fitting the projections into the plane rectangular space of the buffer material Titanium Magnet Crown system implants having a buffer mechanism, characterized in that the formation of the cuts to the cushioning material so as to facilitate desorption of force.
JP2000190313A 2000-06-23 2000-06-23 Titanium magnet crown system implant with shock absorber Expired - Fee Related JP4624526B2 (en)

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