JPH078513A - Artificial joint - Google Patents
Artificial jointInfo
- Publication number
- JPH078513A JPH078513A JP15218893A JP15218893A JPH078513A JP H078513 A JPH078513 A JP H078513A JP 15218893 A JP15218893 A JP 15218893A JP 15218893 A JP15218893 A JP 15218893A JP H078513 A JPH078513 A JP H078513A
- Authority
- JP
- Japan
- Prior art keywords
- bone
- artificial
- joint
- artificial joint
- acetabular
- 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
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- Prostheses (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、生体の骨の関節部を代
替する人工関節に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial joint which replaces a bone joint of a living body.
【0002】[0002]
【従来の技術】人体の関節に変形、欠損、壊死等が生じ
た場合に関節を補綴して関節機能を再建する人工関節が
整形外科においてよく使用されている。人工関節にはそ
の使用部位により人工股関節、人工膝関節、人工肩関
節、人工肘関節、人工足関節、人工指関節などがある。
特に人工股関節と人工膝関節の使用量は他の関節に比べ
たいへん多くなっている。人工股関節はさらに、大腿骨
へ固定され骨頭の機能を果たす大腿骨部品と寛骨へ固定
され臼蓋の機能を果たす臼蓋部品とにより構成されてい
る。大腿骨部品は切り取られた大腿骨頚の断端より挿入
され大腿骨骨幹部により支持固定されるものが多い。人
工股関節の骨幹部へ挿入され、支持固定される部分は通
例ステムと呼ばれ、大腿骨に埋入されないで大腿骨から
飛び出し、股関節では通常球面となっている関節運動を
行う部分は骨頭部と呼ばれ、ステム部と骨頭部の間はネ
ック部と呼ばれている。2. Description of the Related Art Artificial joints are often used in orthopedics to restore the joint function by prosthesing the joints of the human body when the joints are deformed, defective, necrotic or the like. The artificial joint includes an artificial hip joint, an artificial knee joint, an artificial shoulder joint, an artificial elbow joint, an artificial ankle joint, an artificial finger joint, and the like, depending on the site of use.
Especially, the amount of artificial hip joints and artificial knee joints used is much larger than other joints. The artificial hip joint is further composed of a femoral component that is fixed to the femur and functions as a femoral head, and an acetabular component that is fixed to the hipbone and functions as an acetabulum. In many cases, the femoral component is inserted through the cut end of the femoral neck and is supported and fixed by the femoral shaft. The part that is inserted into the diaphyseal portion of the artificial hip joint and is supported and fixed is usually called the stem. It is called the neck between the stem and the head of the bone.
【0003】材質は普通ステンレスSUS316L、C
o−Cr合金、Ti合金などにより造られている。臼蓋
部品の多くは骨頭部と組み合わされ関節運動を行うすべ
り部と、そのすべり部を包んで形態の保持と骨への固定
を行う臼蓋固定部よりなる。すべり部は超高分子量ポリ
エチレンが使われており、臼蓋固定部はすべり部のポリ
エチレン自身か前記金属材料のカップより造られてい
る。また、上述した人工関節は、骨セメント(合成高分
子であるポリメチルメタクリレートを主成分とするもの
など)や、はめあわせの嵌合力により骨に固定されてい
るものが多い。Material is usually stainless steel SUS316L, C
It is made of an o-Cr alloy, a Ti alloy, or the like. Most of the acetabular parts are composed of a sliding part that is combined with the head of the bone to perform joint movement, and an acetabular fixing part that wraps the sliding part to hold the shape and fix it to the bone. Ultra-high molecular weight polyethylene is used for the sliding portion, and the acetabular fixing portion is made of polyethylene itself of the sliding portion or a cup of the metal material. Many of the above-mentioned artificial joints are fixed to bone by bone cement (such as those containing polymethylmethacrylate, which is a synthetic polymer as a main component), or fitting force of fitting.
【0004】[0004]
【発明が解決しようとする課題】しかし、この様な人工
関節にも多くの問題がある。時間の経過と共に人工関節
と骨との固定性が失われ(ルースニング)関節機能の破
綻をきたすこともそのひとつである。このルースニング
の原因は、関節運動によって骨頭部とすべり部が摩耗し
た結果造りだされる摩耗粉、特に骨頭部にくらべ多量に
摩耗するすべり部のポリエチレン摩耗粉と、固定に使用
される骨セメントの分解産物などにたいし、異物の処理
を担当する貪食細胞が作用し炎症反応を引き起こし、そ
の結果骨の溶解が起こることによると言われている。関
節運動により産生したポリエチレン摩耗粉は関節周囲の
軟組織に取り込まれ、さらに移動し、骨と人工関節の
間、あるいは骨と骨セメントの間に入り込み、炎症反応
によりその付近の骨組織を溶解してしまうのである。However, such an artificial joint has many problems. One of them is that the fixation between the artificial joint and the bone is lost over time (loosening), and the joint function is broken. The causes of this loosening are wear debris produced as a result of the wear of the bone head and slip parts by joint movement, especially polyethylene wear powder of the slip part that wears more than the bone head, and bone cement used for fixation. It is said that phagocytic cells, which are in charge of processing foreign substances, act on the degradation products of erythrocytes to cause an inflammatory reaction, resulting in the dissolution of bone. Polyethylene wear powder produced by joint motion is taken up by the soft tissue around the joint and further migrates to enter between the bone and the artificial joint or between the bone and bone cement, and dissolves the bone tissue in the vicinity due to the inflammatory reaction. It ends up.
【0005】[0005]
【課題を解決するための手段】本発明者は上記の問題点
を鑑みて鋭意研究した結果、以下の本発明によって解決
できることを見いだした。 (1) 生体の骨の関節部を代替する人工関節におい
て、人工関節部と、前記人工関節部と生体骨との間隙を
被覆するための被覆接着部を有することを特徴とする人
工関節。 (2) 上記被覆接着部が軟質材料からなる上記(1)
記載の人工関節。 (3) 上記軟質材料の生体骨に近い面に50〜200
0ミクロンの空隙からなる大多孔層を有する上記(1)
及び(2)記載の人工関節。Means for Solving the Problems The inventors of the present invention have made extensive studies in view of the above problems, and as a result, have found that the following invention can solve the problems. (1) An artificial joint that replaces a joint part of a bone of a living body, the artificial joint having an artificial joint part and a coating adhesive part for covering a gap between the artificial joint part and the living bone. (2) The above-mentioned (1) in which the coated adhesive portion is made of a soft material.
The described artificial joint. (3) 50 to 200 on the surface of the soft material near the living bone
The above (1) having a large porous layer consisting of 0 micron voids
And the artificial joint according to (2).
【0006】(4) 上記軟質材料の関節腔側が0.0
1〜5ミクロンの微細空隙を有する微細多孔層である上
記(1)及び(2)記載の人工関節。 (5) 上記軟質材料が生体適合性合成高分子からな
り、ゲル、フィルム、編み物、織物、多孔体、不織布の
うちの少なくとも1つの形態からなる上記(1)〜
(4)記載の人工関節。 (6) 上記軟質材料が生体用金属材料を部分的に含ん
でいる上記(1)〜(5)記載の人工関節。(4) The soft material is 0.0 on the joint cavity side.
The artificial joint according to (1) or (2) above, which is a microporous layer having micropores of 1 to 5 microns. (5) The soft material is made of a biocompatible synthetic polymer and is in the form of at least one of gel, film, knit, woven fabric, porous body and nonwoven fabric.
(4) The artificial joint according to the above. (6) The artificial joint according to (1) to (5) above, wherein the soft material partially contains a biomedical metal material.
【0007】人工関節のしゅう動部は通常分子量300
万ダルトン程度のポリエチレン(超高分子量ポリエチレ
ン,UHMWPE,PE)が用いられている。PEはテ
フロンに比べ非常に摩耗量が少なく問題の少ない材料で
ある。しかし、人工股関節置換手術後PE摩耗粉による
炎症などにより10年前後の時期に骨との間が緩んでし
まい十分な機能を果たせなくなってしまう。本発明の人
工関節は、人工関節部と生体骨との間隙を被覆するため
の被覆接着部を設けることにより、骨頭部とすべり部の
摺動により発生するPE摩耗粉が、臼蓋固定部と臼蓋骨
の間、あるいはステム部周囲の大腿骨骨髄に入り込むこ
とを阻止することにより、ルーズニングを防止するもの
である。The sliding part of an artificial joint usually has a molecular weight of 300.
Polyethylene (ultra high molecular weight polyethylene, UHMWPE, PE) of about 10,000 Dalton is used. PE is a material that has much less wear than Teflon and is less problematic. However, after artificial hip joint replacement surgery, due to inflammation due to PE abrasion powder, the space between the bones loosens around 10 years, and it becomes impossible to perform a sufficient function. In the artificial joint of the present invention, by providing the covering adhesive part for covering the gap between the artificial joint part and the living bone, PE abrasion powder generated by sliding between the bone head part and the sliding part is fixed to the acetabular fixing part. Loosening is prevented by preventing entry into the femoral bone marrow between the acetabular bones or around the stem.
【0008】具体的に図を用いて説明する。なお、ここ
では人工股関節における用途について説明する。図1は
本発明の臼蓋側の人工関節の断面図である。人工関節
(臼蓋)11は臼蓋固定部12、すべり部13、及び被
覆接着部14より構成されている。臼蓋固定部12は通
常Ti、Ti合金、SUS316L、Co−Cr合金な
どで造られ、臼蓋骨あるいは骨セメントにしっかり固定
できる工夫がなされている。すべり部13は上記のごと
く通常超高分子量ポリエチレンが用いられ、臼蓋固定部
12に密着する。A specific description will be given with reference to the drawings. The application in the artificial hip joint will be described here. FIG. 1 is a sectional view of an acetabular artificial joint of the present invention. The artificial joint (acetabular lid) 11 is composed of an acetabular fixation portion 12, a slip portion 13, and a coating adhesive portion 14. The acetabular fixation part 12 is usually made of Ti, Ti alloy, SUS316L, Co-Cr alloy, or the like, and is devised so that it can be firmly fixed to the acetabular bone or bone cement. As described above, the sliding portion 13 is usually made of ultra-high molecular weight polyethylene and is in close contact with the acetabular fixing portion 12.
【0009】被覆接着部14は臼蓋固定部12の縁ある
いは、すべり部13の縁に接合し、縁の周囲に連続して
設けられている。本発明において、接合する方法として
は、人工関節の表面に凹部を設けそこに被覆接着部を挟
み込む、あるいは人工関節の被覆接着部接合部の周囲に
小孔を設け、ポリエステルやチタン等の線維を用いて被
覆接着部を縫い付ける等の方法がある。被覆接着部14
は、生体骨に密着させやすいなどのことから軟質材料で
あることが好ましいが、予め生体骨の形状と一致するよ
うに成形しておくことにより硬質材料も使用できる。材
料としては、軟質材料の場合、生体為害性のないシリコ
ンゴムやポリテトラフルオロエチレン(PTFE)系の
フィルムが好ましく、また、より確実な効果を得るため
に次のような構成をとることができる。The covering adhesive portion 14 is joined to the edge of the acetabular fixing portion 12 or the edge of the sliding portion 13 and is continuously provided around the edge. In the present invention, as a method for joining, a concave portion is provided on the surface of the artificial joint and the covering adhesive portion is sandwiched therein, or a small hole is provided around the covering adhesive portion joining portion of the artificial joint, and fibers such as polyester and titanium are formed. There is a method of sewn the covering adhesive portion using the method. Cover adhesion part 14
Is preferably a soft material because it can be easily attached to a living bone, but a hard material can also be used by previously molding it so as to match the shape of the living bone. As a material, in the case of a soft material, a silicone rubber or a polytetrafluoroethylene (PTFE) -based film that is not harmful to living organisms is preferable, and the following constitution can be adopted to obtain a more reliable effect. .
【0010】(A) 被覆接着部14の生体骨に近い面
15が50〜2000ミクロンの空隙を有する大多孔層
であること。これにより臼蓋周囲の骨膜や軟組織からの
肉芽組織の侵入が容易になり遮蔽性を向上させることが
できる。この大多孔層は、ポリエステル繊維の織物、編
み物、不織布、ポリウレタンのスポンジなど生体に対し
て毒性の少ない軟質材料の加工品を使用することができ
る。(A) The surface 15 of the coated adhesive portion 14 near the living bone is a large porous layer having voids of 50 to 2000 microns. This facilitates the invasion of granulation tissue from the periosteum and soft tissue around the acetabulum and improves the shielding property. As the macroporous layer, a processed product of a soft material such as polyester fiber woven fabric, knitted fabric, non-woven fabric, and polyurethane sponge that is less toxic to the living body can be used.
【0011】(B) 被覆接着部14の関節腔側16が
0.01〜0.5ミクロンの微細空隙を有する微細多孔層
であること。PE摩耗粉を阻止しながら、水や電解質、
一部の蛋白質などを透過するので、被覆接着部に覆われ
ている部分の骨膜、および軟組織の環境を悪化させな
い。この部分の材料としてポリウレタン、ポリプロピレ
ン、PTFEなどの多孔膜などが好適である。(B) The joint cavity side 16 of the coated adhesive portion 14 is a fine porous layer having fine voids of 0.01 to 0.5 micron. While blocking PE abrasion powder, water, electrolyte,
Since it penetrates some proteins and the like, it does not deteriorate the environment of the periosteum and the soft tissue covered by the coated adhesive part. As a material for this portion, a porous film such as polyurethane, polypropylene, or PTFE is suitable.
【0012】(C) 被覆接着部14に生体用金属材料
17が部分的に含まれることにより、臼蓋固定部12の
周囲の組織の凹凸に被覆接着部を合わせることが容易と
なる。生体用金属材料とはTi、Ti合金、SUS31
6L、Co−Cr合金などインプラント材料として通常
用いられているものであればよい。(C) By partially containing the biomedical metal material 17 in the coated adhesive portion 14, it becomes easy to align the coated adhesive portion with the unevenness of the tissue around the acetabular fixation portion 12. Biological metal materials include Ti, Ti alloys, SUS31
What is normally used as an implant material such as 6L and a Co—Cr alloy may be used.
【0013】人工関節(臼蓋)11の取り付け方法は以
下の通りである。患者の臼蓋骨を人工関節(臼蓋)11
の臼蓋固定部12の外面形状に合わせ切削し、コラーゲ
ン−ハイドロキシアパタイト等からなる骨セメントを切
削部に塗り付け、人工関節(臼蓋)11を取り付け角に
注意しながら骨セメントが硬化する前に押しつけ臼蓋骨
に固定する。その後、被覆接着部14を周囲組織の形状
に合わせるように押しつける。The method of attaching the artificial joint (acetabular cover) 11 is as follows. The acetabular bone of the patient is artificial joint (acetabular) 11
Before the bone cement is hardened by cutting it according to the outer surface shape of the acetabular fixation part 12, and applying a bone cement made of collagen-hydroxyapatite or the like to the cutting part and paying attention to the attachment angle of the artificial joint (acetabular) 11. Press to secure the acetabulum. After that, the coated adhesive portion 14 is pressed so as to match the shape of the surrounding tissue.
【0014】図2は本発明の人工関節(大腿骨)の断面
図である。人工関節(大腿骨)21は、骨頭部22、ネ
ック部23、ステム部28、及び被覆接着部24より構
成されている。骨頭部22は、Co−Cr合金やジルコ
ニアセラミックスなどで造られる。ネック部23、ステ
ム部28は、通常一体で造られており、Ti、Ti合
金、SUS316L、Co−Cr合金などが好適であ
る。被覆接着部24はネック部23とステム部28の境
付近よりステム部28と垂直方向に張り出している。材
料は上記の人工関節(臼蓋)の被覆接着部14と同じも
のである。FIG. 2 is a sectional view of the artificial joint (femur) of the present invention. The artificial joint (femur) 21 includes a bone head 22, a neck portion 23, a stem portion 28, and a coating adhesive portion 24. The bone head 22 is made of Co—Cr alloy, zirconia ceramics, or the like. The neck portion 23 and the stem portion 28 are usually integrally formed, and Ti, Ti alloy, SUS316L, Co—Cr alloy and the like are suitable. The covering adhesive portion 24 projects from the vicinity of the boundary between the neck portion 23 and the stem portion 28 in the direction perpendicular to the stem portion 28. The material is the same as the covering adhesive portion 14 of the artificial joint (acetabulum).
【0015】人工関節(大腿骨)21の取り付け方法は
以下の通りである。大腿骨骨頚部を切断後、骨髄腔をス
テム部28の形状に合わせリーミングする。骨セメント
を骨髄腔に充填後、骨セメントの硬化前に大腿骨部品ス
テム部28を骨髄腔に挿入し固定する。その後、被覆接
着部24を周囲組織の形状に合わせるように押しつけ
る。以上、本発明の人工関節の人工股関節における用途
について説明してきたが、骨−インプラント界面へのP
E摩耗粉の侵入を阻止するために人工膝関節、人工肩関
節、人工肘関節、人工足関節、人工指関節その他の部分
に同様に使用することができるのは言うまでもない。以
下、実施例を示し本発明を更に詳細に説明する。The method of attaching the artificial joint (femur) 21 is as follows. After cutting the femoral neck, the bone marrow cavity is reamed according to the shape of the stem portion 28. After filling the bone marrow cavity with bone cement, the femoral component stem portion 28 is inserted and fixed in the bone marrow cavity before hardening of the bone cement. After that, the coated adhesive portion 24 is pressed so as to match the shape of the surrounding tissue. The application of the artificial joint of the present invention in the artificial hip joint has been described above.
It is needless to say that it can be similarly used for artificial knee joints, artificial shoulder joints, artificial elbow joints, artificial ankle joints, artificial finger joints, and other parts to prevent the invasion of wear particles. Hereinafter, the present invention will be described in more detail with reference to examples.
【0016】[0016]
(実施例1)家兎股関節を用いて本発明の人工関節に用
いる被覆接着部の効果を確認するため、以下の通りの実
験を行った。 PE摩耗粉の作製 超高分子量ポリエチレン(ニューライト、作新工業株式
会社製)の板材とジルコニアセラミック(品川白煉瓦株
式会社製)を生理食塩水中で摺り合わせ摩耗粉を作製し
た。 軟質材料被覆接着部の作製 ポリエステル繊維にTi繊維を織り込み、更にポリプロ
ピレン多孔体をポイント融着により張り合わせ、被覆接
着部材を作成した。ポリエステル織物は100〜500μmの
空隙を有し厚さ0.7mm、ポリプロピレン多孔体は抽出法
により作製した平均孔径0.5μm、厚さ150μmの多孔膜を
用いた。Example 1 In order to confirm the effect of the coated adhesive part used in the artificial joint of the present invention using a rabbit hip joint, the following experiment was conducted. Preparation of PE abrasion powder A plate material made of ultra-high molecular weight polyethylene (Newlite, manufactured by Sakushin Kogyo Co., Ltd.) and zirconia ceramic (produced by Shinagawa Shiro Brick Co., Ltd.) were rubbed together in physiological saline to prepare abrasion powder. Preparation of Soft Material Covered Adhesive Part Ti fiber was woven into polyester fiber and polypropylene porous body was further bonded by point fusion to prepare a coated adhesive member. The polyester woven fabric had a pore size of 100 to 500 μm and a thickness of 0.7 mm, and the polypropylene porous body was a porous membrane having an average pore size of 0.5 μm and a thickness of 150 μm, which was prepared by the extraction method.
【0017】 家兎への埋入 日本白色家兎(体重2.5〜3.0kg,雄)の大腿骨骨頭を露
出し骨頚部を切断する。実験群として大腿骨切断面を上
記軟質材料の被覆接着部材により覆い、創部にPE摩耗
粉を添加し、そのまま整復し周辺の筋肉、皮膚縫合を行
った。12週間後、屠殺し大腿骨近位部の病理観察を行
った。比較群として軟質材料スカートを使用しないで同
様の処置を行った。 結果 実験群の大腿骨近位骨髄腔内は被覆接着部材付近に線維
組織がみられるが、概ね骨髄組織は健全であった。比較
群の大腿骨近位骨髄腔内は切断端から線維組織が侵入し
骨髄が少なくなっていた。線維組織内にはPE摩耗粉ら
しき異物が散在しその周囲に異物巨細胞が多くみられ
た。Implantation in Rabbit A white Japanese rabbit (weight 2.5-3.0 kg, male) is exposed at the femoral head and the neck of the femur is cut. As an experimental group, the cut surface of the femur was covered with the above adhesive covering member of the soft material, PE abrasion powder was added to the wound, and the wound was directly reduced and the peripheral muscle and skin were sutured. After 12 weeks, the animals were sacrificed and pathological observation was performed on the proximal part of the femur. Similar treatment was performed without using the soft material skirt as a comparison group. Results In the femoral bone marrow cavity of the experimental group, fibrous tissue was found near the coated adhesive member, but the bone marrow tissue was generally healthy. In the femoral bone marrow cavity of the comparative group, fibrous tissue invaded from the cut end, and the bone marrow was reduced. Foreign matter, which appeared to be PE wear powder, was scattered in the fibrous tissue, and many foreign matter giant cells were found around it.
【0018】(実施例2)Ti製の臼蓋固定部,超高分
子量ポリエチレン(ニューライト、作新工業株式会社
製)製のすべり部を有する人工臼蓋の臼蓋固定部の縁に
円周上に連続的に凹溝を設けた。実施例1−で作成し
た被覆接着部材の中心付近に、臼蓋固定部の凹溝の円周
と同径の穴を空け、当該穴の人工臼蓋を挿入し、凹溝に
被覆接着部材を挟み込むことによって固定し、犬用人工
臼蓋を作成した。同様に、Co−Cr合金製の骨頭部、
Ti製のネック部及びステム部を有する人工大腿骨のネ
ック部に実施例1−で作製した被覆接着部材を接合
し、犬用人工大腿骨を作製した。(Example 2) A acetabular fixing part made of Ti and a slip part made of ultra-high molecular weight polyethylene (Nulite, manufactured by Sakushin Kogyo Co., Ltd.) are provided around the circumference of the acetabular fixing part of the artificial acetabulum. A groove was continuously provided on the top. In the vicinity of the center of the coated adhesive member created in Example 1-, a hole having the same diameter as the circumference of the concave groove of the mortar lid fixing portion is opened, the artificial mortar of the hole is inserted, and the coated adhesive member is inserted into the concave groove. An artificial acetabular lid for a dog was prepared by sandwiching and fixing. Similarly, a bone head made of Co-Cr alloy,
The coated adhesive member produced in Example 1 was joined to the neck portion of the artificial femur having a Ti neck and stem to produce a dog artificial femur.
【0019】上記人工臼蓋及び人工大腿骨を雑種成犬に
移植し、創部を閉鎖する前に実施例1で用いたポリエチ
レン摩耗粉を人工臼蓋及び人工大腿骨の周辺に添加し
た。比較として被覆接着部材を接合していない以外は上
記と同様な人工臼蓋及び人工大腿骨を用いて同様な処理
を行った。12週間後に屠殺し、人工臼蓋及び人工大腿
骨の近位部の病理観察を行った。実施例では、人工臼蓋
の臼蓋固定部及び人工大腿骨のステム部周辺に多少の線
維性組織と骨組織が見られ、骨性の固定性が得られつつ
あった。比較例では、実施例とほぼ同様な所見の他に、
ポリエチレン摩耗粉が散在し、異物巨細胞が見られ、炎
症の継続した様子が見られた。The artificial acetabulum and artificial femur were transplanted into a hybrid dog, and the polyethylene abrasion powder used in Example 1 was added to the periphery of the artificial acetabulum and artificial femur before closing the wound. As a comparison, the same treatment was performed using the same artificial acetabulum and artificial femur as described above except that the coated adhesive member was not joined. Twelve weeks later, the animals were sacrificed, and pathological observations were performed on the artificial acetabulum and the proximal part of the artificial femur. In the example, some fibrous tissue and bone tissue were found around the acetabular fixation part of the artificial acetabulum and the stem part of the artificial femur, and bony property was being obtained. In the comparative example, in addition to the findings similar to those of the example,
Polyethylene abrasion powder was scattered, foreign body giant cells were seen, and the appearance of continued inflammation was seen.
【0020】[0020]
【発明の効果】以上詳述したように、本発明の人工関節
は、生体の骨の関節部を代替する人工関節において、人
工関節の骨への固定部分の骨とインプラントとの間隙に
蓋をするための被覆接着部を有するので、ポリエチレン
などの摩耗粉が骨と人工関節の間、あるいは骨とセメン
トの間に入り込むことを防ぎひいてはルーズニングを防
止することができる。As described above in detail, the artificial joint of the present invention is an artificial joint which replaces the joint part of the bone of the living body, and a lid is provided in the gap between the bone of the artificial joint fixing part to the bone and the implant. Since it has a coated adhesive portion for preventing the abrasion dust from entering between the bone and the artificial joint or between the bone and the cement, loosening can be prevented.
【図1】本発明の人工関節の一例である人工臼蓋の断面
図である。FIG. 1 is a cross-sectional view of an artificial acetabulum that is an example of an artificial joint of the present invention.
【図2】本発明の人工関節の一例である人工大腿骨の断
面図である。 符号の説明 11・・・人工関節(臼蓋)、12・・・
臼蓋固定部、13・・・すべり部、14・・・被覆接着
部、21・・・人工関節(大腿骨)、22・・・骨頭
部、23・・・ネック部、28・・・ステム部、24・
・・被覆接着部FIG. 2 is a cross-sectional view of an artificial femur that is an example of the artificial joint of the present invention. Explanation of symbols 11 ... Artificial joint (acetabulum), 12 ...
Abutment plate fixing part, 13 ... Slip part, 14 ... Coating adhesive part, 21 ... Artificial joint (femur), 22 ... Bone head, 23 ... Neck part, 28 ... Stem Department, 24
..Coating adhesive parts
Claims (1)
おいて、人工関節部と、前記人工関節部と生体骨との間
隙を被覆するための被覆接着部を有することを特徴とす
る人工関節。1. An artificial joint which replaces a joint part of a bone of a living body, the artificial joint having an artificial joint part and a coating adhesive part for covering a gap between the artificial joint part and the living bone. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15218893A JPH078513A (en) | 1993-06-23 | 1993-06-23 | Artificial joint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15218893A JPH078513A (en) | 1993-06-23 | 1993-06-23 | Artificial joint |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH078513A true JPH078513A (en) | 1995-01-13 |
Family
ID=15534991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15218893A Pending JPH078513A (en) | 1993-06-23 | 1993-06-23 | Artificial joint |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH078513A (en) |
-
1993
- 1993-06-23 JP JP15218893A patent/JPH078513A/en active Pending
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