JP5547915B2 - 調整された曲率半径をもつ顆を有する整形外科用の大腿骨構成要素 - Google Patents
調整された曲率半径をもつ顆を有する整形外科用の大腿骨構成要素 Download PDFInfo
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
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Description
相互参照は、「調整された曲率半径をもつ顆を有する整形外科用の後十字靱帯温存型の膝関節プロテーゼ(Posterior Cruciate-Retaining Orthopaedic Knee Prosthesis Having Controlled Condylar Curvature)」という名称でクリステル・エム・ワグナー(Christel M. Wagner)によって2008年6月30日に出願された米国特許出願第XX/XXX,XXX号;「調整された曲率半径をもつ顆を有する整形外科用の後方安定型の膝関節プロテーゼ(Posterior Stabilized Orthopaedic Knee Prosthesis Having Controlled Condylar Curvature)」という名称でジョン・エル・ウィリアムズ(John L. Williams)らによって2008年6月30日に出願された米国特許出願第XX/XXX,XXX号;および、「整形外科用の後方安定型のプロテーゼ(Posterior Stabilized Orthopaedic Prosthesis)」という名称でジョセフ・ジー・ワイス(Joseph G. Wyss)によって2008年6月30日に出願された米国特許出願第XX/XXX,XXX号;および、「調整された曲率半径をもつ顆を有する整形外科用の膝関節プロテーゼ(Orthopaedic Knee Prosthesis Having Controlled Condylar Curvature)」という名称でジョセフ・ジー・ワイス(Joseph G. Wyss)によって2008年6月30日に出願された米国仮特許出願第XX/XXX,XXX号に対して行われており、当該各出願の開示内容全体は、参照によって、この明細書に組み込まれる。
本出願の開示内容は、概ね、整形外科用のプロテーゼに関するものであり、具体的には、膝置換術に使用される整形外科用のプロテーゼに関するものである。
関節形成術は、病変した生来の関節および/または損傷した生来の関節が人工関節によって置換される周知の外科手術である。代表的な膝関節プロテーゼは、脛骨トレイ、大腿骨構成要素、および、当該脛骨トレイと当該大腿骨構成要素との間に位置付けされるポリマー製の挿入部またはベアリングを含む。患者の関節に対する損傷の重症レベルに応じて、可動度の変わる整形外科用のプロテーゼが使用されることがある。例えば、膝関節プロテーゼは、かなりの軟組織の損傷あるいは喪失が存在するときなど、膝関節プロテーゼの動きを規制することが望ましいような場合に「固定化された」脛骨ベアリングを含むことがある。代替的に、膝関節プロテーゼは、動きの大きな自由度が望ましい場合に「可動性」の脛骨ベアリングを含むことがある。加えて、膝関節プロテーゼは、患者の大腿骨の両側の顆の大腿骨・脛骨界面を置換するように設計された全膝関節プロテーゼであってもよく、あるいは、患者の大腿骨の一つの顆の大腿骨・脛骨界面を置換するように設計された、一つの区画(すなわち、一つの顆)を有する膝関節プロテーゼであってもよい。
一つの態様によれば、整形外科用の膝関節プロテーゼは、大腿骨構成要素および脛骨ベアリングを含んでよい。大腿骨構成要素は、矢状面内で湾曲した顆表面を含んでよい。脛骨ベアリングは、大腿骨構成要素の顆表面と関節接合するように構成されたベアリング表面を含んでよい。一部の実施の形態において、大腿骨構成要素の顆表面は、約0°に等しい第1の屈曲角度時において顆表面上の第1の接触点で当該ベアリング表面に接触してもよい。また、顆表面は、第2の屈曲角度時において顆表面上の第2の接触点で当該ベアリング表面に接触してもよい。第2の屈曲角度は、第1の屈曲角度より大きくてもよい。例えば、第2の屈曲角度は、約10°から約100°までの範囲内にあってもよい。一つの特定の実施の形態において、第2の屈曲角度は、約30°である。
本出願の開示内容の概念は種々の変形例および代替の形態例の影響を受けやすいが、当該開示内容の特定の例示的な実施の形態は、図面における例によって示され、かつ、この明細書で詳細に記述されるはずである。しかし、本出願の開示内容の概念を開示された特定の形態に限定する意図がなく、逆に、本発明が、この明細書に添付された特許請求の範囲の請求項によって規定された本発明の精神および範囲内に入る、すべての変形例、等価物、および、代替物を包含するものと理解されるべきである。
〔実施の態様〕
(1) 整形外科用の膝関節プロテーゼにおいて、
矢状面内で湾曲した顆表面を有する大腿骨構成要素と、
前記大腿骨構成要素の前記顆表面と関節接合するように構成されたベアリング表面を有する脛骨ベアリングと、
を含み、
前記顆表面は、(i)約0°に等しい第1の屈曲角度時において前記顆表面上の第1の接触点で前記ベアリング表面に接触し、(ii)第2の屈曲角度時において前記顆表面上の第2の接触点で前記ベアリング表面に接触し、前記第2の屈曲角度は、前記第1の屈曲角度より大きいものであり、
(i)前記矢状面内の前記顆表面は、前記第1の接触点に第1の曲率半径、および、前記第2の接触点に第2の曲率半径を有しており、(ii)前記第2の曲率半径は、少なくとも0.5mmだけ、前記第1の曲率半径より大きいものである、整形外科用の膝関節プロテーゼ。
(2) 実施態様1に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の屈曲角度は、少なくとも10°である、整形外科用の膝関節プロテーゼ。
(3) 実施態様2に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の屈曲角度は、10°から100°までの範囲内にある、整形外科用の膝関節プロテーゼ。
(4) 実施態様3に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の屈曲角度は、約30°である、整形外科用の膝関節プロテーゼ。
(5) 実施態様1に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径は、少なくとも2mmの距離だけ、前記第1の曲率半径より大きい、整形外科用の膝関節プロテーゼ。
(6) 実施態様5に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径は、少なくとも5mmの距離だけ、前記第1の曲率半径より大きい、整形外科用の膝関節プロテーゼ。
(7) 実施態様1に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径に対する前記第1の曲率半径の比は、0.50から0.99までの範囲内にある、整形外科用の膝関節プロテーゼ。
(8) 実施態様7に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径に対する前記第1の曲率半径の比は、0.90から0.99までの範囲内にある、整形外科用の膝関節プロテーゼ。
(9) 実施態様1に記載の整形外科用の膝関節プロテーゼにおいて、
前記顆表面は、第3の屈曲角度時において前記顆表面上の第3の接触点で前記ベアリング表面に接触し、前記第3の屈曲角度は、前記第2の屈曲角度より大きく、かつ、約90°より小さいものであり、
(i)前記矢状面内の前記顆表面は、前記第3の接触点に第3の曲率半径を有しており、(ii)前記第3の曲率半径は、前記第1の曲率半径より大きく、かつ、前記第2の曲率半径より小さいものである、整形外科用の膝関節プロテーゼ。
(10) 実施態様9に記載の整形外科用の膝関節プロテーゼにおいて、
前記第3の曲率半径は、少なくとも0.5mmだけ、前記第2の曲率半径より大きい、整形外科用の膝関節プロテーゼ。
(11) 実施態様1に記載の整形外科用の膝関節プロテーゼにおいて、
前記顆表面は、第3の屈曲角度時において前記顆表面上の第3の接触点で前記ベアリング面に接触し、前記第3の屈曲角度は、前記第2の屈曲角度より大きく、かつ、約90°より小さいものであり、
(i)前記矢状面内の前記顆表面は、前記第3の接触点に第3の曲率半径を有しており、(ii)前記第3の曲率半径は、前記第2の曲率半径より大きいものである、整形外科用の膝関節プロテーゼ。
(12) 実施態様1に記載の整形外科用の膝関節プロテーゼにおいて、
(i)前記大腿骨構成要素の前記顆表面は、内側顆表面であり、前記脛骨ベアリングの前記ベアリング表面は、内側ベアリング表面であり、
(ii)前記大腿骨構成要素は、前記矢状面内で湾曲した外側顆表面をさらに含んでおり、
(iii)前記脛骨ベアリングは、前記大腿骨構成要素の前記外側顆表面と関節接合するように構成された外側ベアリング表面をさらに含んでいる、整形外科用の膝関節プロテーゼ。
(13) 実施態様12に記載の整形外科用の膝関節プロテーゼにおいて、
前記外側顆表面および前記内側顆表面は、前記矢状面内で実質的に対称である、整形外科用の膝関節プロテーゼ。
(14) 実施態様12に記載の整形外科用の膝関節プロテーゼにおいて、
前記外側顆表面は、(i)第3の屈曲角度時において前記外側顆表面上の第1の点で前記外側ベアリング表面に接触し、前記第3の屈曲角度は約30°未満であり、(ii)第4の屈曲角度時において前記外側顆表面上の第2の点で前記外側ベアリング表面に接触し、前記第4の屈曲角度は前記第3の屈曲角度より大きいものであり、
(i)前記矢状面内の前記外側顆表面は、前記第1の接触点に第1の曲率半径を有しており、(ii)前記矢状面内の前記外側顆表面は、前記第2の接触点に第2の曲率半径を有しており、(iii)前記第2の曲率半径は、少なくとも0.5mmだけ、前記第1の曲率半径より大きいものである、整形外科用の膝関節プロテーゼ。
(15) 実施態様14に記載の整形外科用の膝関節プロテーゼにおいて、
前記外側顆の前記第2の曲率半径は、前記内側顆の前記第2の曲率半径とは異なる、整形外科用の膝関節プロテーゼ。
(16) 実施態様14に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の屈曲角度は、前記第4の屈曲角度とは異なる、整形外科用の膝関節プロテーゼ。
(17) 実施態様14に記載の整形外科用の膝関節プロテーゼにおいて、
前記第1の曲率半径と前記第2の曲率半径との差は、前記第3の曲率半径と前記第4の曲率半径との差とは異なる、整形外科用の膝関節プロテーゼ。
(18) 整形外科用の膝関節プロテーゼにおいて、
矢状面内で湾曲した顆表面を有する大腿骨構成要素と、
前記大腿骨構成要素の前記顆表面と関節接合するように構成されたベアリング表面を有する脛骨ベアリングと、
を含み、
前記顆表面は、(i)第1の屈曲角度時において前記顆表面上の第1の接触点で前記ベアリング表面に接触し、前記第1の屈曲角度は30°未満であり、(ii)第2の屈曲角度時において前記顆表面上の第2の接触点で前記ベアリング表面に接触し、前記第2の屈曲角度は、約30°より大きいものであり、
(i)前記矢状面内の前記顆表面は、前記第1の接触点に第1の曲率半径を有しており、(ii)前記矢状面内の前記顆表面は、前記第2の接触点に第2の曲率半径を有しており、(iii)前記第2の曲率半径に対する前記第1の曲率半径の比は、0.80から0.99までの範囲内にある、整形外科用の膝関節プロテーゼ。
(19) 実施態様18に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径に対する前記第1の曲率半径の比は、0.90から0.99までの範囲内にある、整形外科用の膝関節プロテーゼ。
(20) 整形外科用の膝関節プロテーゼにおいて、
矢状面内で湾曲した顆表面を有する大腿骨構成要素と、
前記大腿骨構成要素の前記顆表面と関節接合するように構成されたベアリング表面を有する脛骨ベアリングと、
を含み、
前記顆表面は、(i)第1の屈曲角度時において前記顆表面上の第1の接触点で前記ベアリング表面に接触し、前記第1の屈曲角度は約0°であり、(ii)第2の屈曲角度時において前記顆表面上の第2の接触点で前記ベアリング表面に接触し、前記第2の屈曲角度は、約50°より大きいものであり、
(i)前記矢状面内の前記顆表面は、前記第1の接触点から前記第2の接触点まで延在する湾曲面部分を含んでおり、前記湾曲面部分は、実質的に一定の曲率半径によって画定されている、整形外科用の膝関節プロテーゼ。
(21) 実施態様20に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の屈曲角度は、約70°より大きい、整形外科用の膝関節プロテーゼ。
(22) 整形外科用の膝関節プロテーゼにおいて、
矢状面内で湾曲した顆表面を有する大腿骨構成要素であって、前記顆表面が前方表面および後方表面を有する、大腿骨構成要素を含み、
前記前方表面および前記後方表面は、前記顆表面上の最下点で接しており、
前記後方表面は、(i)最上点、ならびに、(ii)前記最上点および前記最下点から等距離の位置に配された中間点を含んでおり、
(i)前記矢状面内の前記後方表面は、前記最下点と前記中間点との間の前記後方表面上の第1の点に第1の曲率半径を有しており、(ii)前記矢状面内の前記後方表面は、前記第1の点と前記最上点との間の前記後方表面上の第2の点に第2の曲率半径を有しており、(iii)前記第2の曲率半径は、少なくとも0.5mmだけ、前記第1の曲率半径より大きい、整形外科用の膝関節プロテーゼ。
Claims (9)
- 整形外科用の膝関節プロテーゼにおいて、
矢状面内で湾曲した顆表面を有する大腿骨構成要素と、
前記大腿骨構成要素の前記顆表面と関節接合するように構成されたベアリング表面を有する脛骨ベアリングと、
を含み、
前記顆表面は、(i)約0°に等しい第1の屈曲角度時において前記顆表面上の第1の接触点で前記ベアリング表面に接触し、(ii)第2の屈曲角度時において前記顆表面上の第2の接触点で前記ベアリング表面に接触し、前記第2の屈曲角度は、前記第1の屈曲角度より大きいものであり、
(i)前記矢状面内の前記顆表面は、前記第1の接触点に第1の曲率半径、および、前記第2の接触点に第2の曲率半径を有しており、(ii)前記第2の曲率半径は、少なくとも0.5mmだけ、前記第1の曲率半径より大きいものである、整形外科用の膝関節プロテーゼ。 - 請求項1に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の屈曲角度は、10°から100°までの範囲内にある、整形外科用の膝関節プロテーゼ。 - 請求項1に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径は、少なくとも2mmの距離だけ、前記第1の曲率半径より大きい、整形外科用の膝関節プロテーゼ。 - 請求項1に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径に対する前記第1の曲率半径の比は、0.50から0.99までの範囲内にある、整形外科用の膝関節プロテーゼ。 - 請求項4に記載の整形外科用の膝関節プロテーゼにおいて、
前記第2の曲率半径に対する前記第1の曲率半径の比は、0.90から0.99までの範囲内にある、整形外科用の膝関節プロテーゼ。 - 請求項1に記載の整形外科用の膝関節プロテーゼにおいて、
前記顆表面は、第3の屈曲角度時において前記顆表面上の第3の接触点で前記ベアリング表面に接触し、前記第3の屈曲角度は、前記第2の屈曲角度より大きく、かつ、約90°より小さいものであり、
(i)前記矢状面内の前記顆表面は、前記第3の接触点に第3の曲率半径を有しており、(ii)前記第3の曲率半径は、前記第1の曲率半径より大きく、かつ、前記第2の曲率半径より小さいものである、整形外科用の膝関節プロテーゼ。 - 請求項1に記載の整形外科用の膝関節プロテーゼにおいて、
前記顆表面は、第3の屈曲角度時において前記顆表面上の第3の接触点で前記ベアリング表面に接触し、前記第3の屈曲角度は、前記第2の屈曲角度より大きく、かつ、約90°より小さいものであり、
(i)前記矢状面内の前記顆表面は、前記第3の接触点に第3の曲率半径を有しており、(ii)前記第3の曲率半径は、前記第2の曲率半径より大きいものである、整形外科用の膝関節プロテーゼ。 - 請求項1に記載の整形外科用の膝関節プロテーゼにおいて、
(i)前記大腿骨構成要素の前記顆表面は、内側顆表面であり、前記脛骨ベアリングの前記ベアリング表面は、内側ベアリング表面であり、
(ii)前記大腿骨構成要素は、前記矢状面内で湾曲した外側顆表面をさらに含んでおり、
(iii)前記脛骨ベアリングは、前記大腿骨構成要素の前記外側顆表面と関節接合するように構成された外側ベアリング表面をさらに含んでいる、整形外科用の膝関節プロテーゼ。 - 請求項8に記載の整形外科用の膝関節プロテーゼにおいて、
前記外側顆表面は、(i)第3の屈曲角度時において前記外側顆表面上の第1の点で前記外側ベアリング表面に接触し、前記第3の屈曲角度は約30°未満であり、(ii)第4の屈曲角度時において前記外側顆表面上の第2の点で前記外側ベアリング表面に接触し、前記第4の屈曲角度は前記第3の屈曲角度より大きいものであり、
(i)前記矢状面内の前記外側顆表面は、前記第1の接触点に第1の曲率半径を有しており、(ii)前記矢状面内の前記外側顆表面は、前記第2の接触点に第2の曲率半径を有しており、(iii)前記第2の曲率半径は、少なくとも0.5mmだけ、前記第1の曲率半径より大きいものである、整形外科用の膝関節プロテーゼ。
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US8828086B2 (en) | 2014-09-09 |
US12109119B2 (en) | 2024-10-08 |
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