JP2011528236A - 高次nurbs曲面を有する全置換人工膝関節 - Google Patents
高次nurbs曲面を有する全置換人工膝関節 Download PDFInfo
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Abstract
【選択図】 図1
Description
Claims (38)
- 前側、後側、外側、内側、遠位側、および近位側と、矢状面、冠状面、および横断面とを有する人工膝関節であって、
a)対応する大腿骨の遠位端に接合する大腿骨要素であって、メジャー回転軸およびマイナー回転軸を有するトロイダル前面およびトロイダル後面を有する遠位関節形成面を有する内側顆および外側顆と、関節形成膝蓋面を有する膝蓋フランジとを含むものである、前記大腿骨要素と、
b)対応する脛骨の近位端に接合する脛骨要素であって、前記内側顆および外側顆とそれぞれ関節接合する近位内側および外側座面を含むものであって、この座面は異なる平面に配向される主曲率半径を有するトロイダル前面およびトロイダル後面を有するものである、前記脛骨要素と
を有し、
前記人工膝関節により、膝の屈曲時、前記脛骨に対する前記大腿骨の前後移動を可能にし、前記脛骨がその縦軸の周りを回転することを可能にするものである人工膝関節。 - 請求項1記載の人工膝関節において、前記脛骨の軸回転は、膝が完全伸展から中間位置まで屈曲するとき、略10度未満に制限されるが、膝が前記中間位置から完全屈曲まで屈曲するとき、10度より大きい前記脛骨軸回転が可能である。
- 請求項1記載の人工膝関節において、前記顆前面および顆後面の各々の主曲率半径は前記矢状面に配向されており、各前記面の小曲率半径は殆どの場合前記冠状面に配向されているものである。
- 請求項1記載の人工膝関節において、各前記顆部の前面および後面の主曲率半径は不等であり、各前記面の小曲率半径は等しいものである。
- 請求項1記載の人工膝関節において、各前記脛骨座面の前面の主曲率半径は前記矢状面に配向され、小曲率半径は前記冠状面または前記横断面に略配向されているものである。
- 請求項5記載の人工膝関節において、各前記脛骨座面の後面のメジャー曲率曲線は前記横断面に配向され、小曲率半径は前記冠状面に略配向されているものである。
- 請求項4記載の人工膝関節において、各前記脛骨座面の前面および後面の主曲率半径は不等であり、前記小曲率半径は等しいものである。
- 請求項7記載の人工膝関節において、前記顆面の小曲率半径は、前記脛骨座面の前面および後面の小曲率半径と等しいか若しくは小さいものである。
- 請求項1記載の人工膝関節において、前記内側顆および外側顆の前面の各々は異なる主曲率半径を有し、前記内側顆および外側顆の後面の各々は異なる主曲率半径を有するものである。
- 請求項9記載の人工膝関節において、前記内側顆および外側顆の前面および後面は同じ小曲率半径を有するものである。
- 請求項9記載の人工膝関節において、前記内側および外側脛骨座面の前面の各々は異なる主曲率半径を有し、前記内側および外側脛骨座面の後面の各々は異なる主曲率半径を有するものである。
- 請求項1記載の人工膝関節において、前記内側および外側脛骨座面は、前記主曲率半径の単一中心を共有するものである。
- 請求項1記載の人工膝関節において、前記内側および外側脛骨座面は、前記主曲率半径の異なる中心を有するものである。
- 請求項1記載の人工膝関節において、前記顆部の前面の各々は前記矢状面に少なくとも第1の主曲率半径を有し、前記後面の各々は、前記矢状面に前記第1の主曲率半径より小さい少なくとも第1の主曲率半径を有するものである。
- 請求項14記載の人工膝関節において、前記顆前面および顆後面の各々は、前記矢状面に複数の曲率半径を有するものである。
- 請求項15記載の人工膝関節において、前記前面および後面の各々は、同じ小曲率半径を有する。
- 請求項1記載の人工膝関節において、前記脛骨座面の前面の各々は、前記矢状面に少なくとも第1の主曲率半径を有し、前記横断面に前記第1の前面曲率半径より大きい少なくとも第1の曲率半径を有するものである。
- 請求項17記載の人工膝関節において、前記脛骨座面の前面の各々は、前記矢状面に複数の主曲率半径を有し、前記後面の各々は、前記横断面に複数の主曲率半径を有するものである。
- 請求項18記載の人工膝関節において、前記脛骨座面の前面および後面の各々は、同じ小曲率半径を有するものである。
- 請求項2記載の人工膝関節において、前記脛骨は、前記完全伸展から前記中間位置まで10度未満で軸方向に回転し、前記中間位置から完全屈曲まで10度を超えて軸方向に回転するものである。
- 請求項1記載の人工膝関節において、前記顆部は、前記脛骨座面において屈曲の間後方へ移動し、伸展の間前方へ移動するものである。
- 請求項21記載の人工膝関節において、前記人工膝関節が完全屈曲した後、前記後方移動は約1〜2ミリメートルである。
- 請求項1記載の人工膝関節において、各前記顆後部は、100度より大きく屈曲するように成形されているものである。
- 請求項1記載の人工膝関節において、各前記顆後部は、130度より大きく屈曲するように成形されているものである。
- 請求項1記載の人工膝関節において、前記脛骨要素は、遠位面および近位面を有するベースと、前記ベースの近位面と契合する遠位面、および前記大腿骨要素と契合し関節結合する前記座面を形成する近位面を有するライナーとを有するものである。
- 請求項25記載の人工膝関節において、前記ベースは、脛骨プラトーの上に載せられるベースプレートと、近位脛骨髄管の中へ挿入可能な前記ベースプレートの遠位面に固定されたキールとを有するものである。
- 請求項26記載の人工膝関節において、前記ベースプレートの遠位端はテクスチャード加工された粗面を有するものである。
- 請求項1記載の人工膝関節において、前記脛骨要素に対する前記大腿骨要素の前後移動は、後十字靱帯によって制御されるものである。
- 請求項1記載の人工膝関節において、前記大腿骨の回転は後十字靱帯によって制御されるものである。
- 請求項1記載の人工膝関節において、前記大腿骨要素は前記顆後端を連結するカムを含み、前記脛骨要素は前記凹面の中間に位置する中心ポストを含むものである。
- 請求項30記載の人工膝関節において、前記脛骨要素に対する前記大腿骨要素の前後移動は、前記カムおよび前記中心ポストによって制御されるものである。
- 請求項30記載の人工膝関節において、前記脛骨のその縦軸の周りの回転は、前記カムおよび前記中心ポストによって制御されるものである。
- 請求項28記載の人工膝関節において、前記カムと前記中心ポストとの接触は、膝の屈曲が略30度を超えたときに起こるものである。
- 請求項1記載の人工膝関節において、各前記顆面の主曲率半径の中心は、前記大腿骨の内側上顆および外側上顆を結合する軸にある。
- 請求項11記載の人工膝関節において、各前記顆面の主曲率半径の中心は、前記大腿骨の内側上顆および外側上顆を結合する軸にある。
- 請求項1記載の人工膝関節において、各前記脛骨座面の前面および後面は滑らかに融合しているものである。
- 請求項36記載の人工膝関節において、前記脛骨座面は、前記顆部と関節接合するパッチ面が装着されるものである。
- 前側、後側、外側、内側、遠位側、および近位側と、矢状面、冠状面、および横断面とを有する人工膝関節であって
a)対応する大腿骨の遠位端に接合する大腿骨要素であって、主曲率半径およびマイナー回転軸を有するトロイダル前面およびトロイダル後面を有する遠位関節形成面を有する内側顆および外側顆と、関節形成膝蓋面を有する膝蓋フランジとを含むものである、前記大腿骨要素と、
b)対応する脛骨の近位端に接合する脛骨要素であって、前記内側顆および外側顆と関節接合する内側凹面および外側凹面を有する近位座面を含むものであって、当該凹面は主曲率半径および小曲率半径を有するトロイダル前面およびトロイダル後面を有するものである、前記脛骨要素と
を有し、 前記人工膝関節により、膝の屈曲時、前記脛骨に対する前記大腿骨の前後移動を可能にし、前記脛骨がその縦軸の周りを回転することを可能にするものである人工膝関節。
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2009
- 2009-02-18 EP EP20090713380 patent/EP2254519B1/en active Active
- 2009-02-18 CN CN200980113597.8A patent/CN102006839B/zh active Active
- 2009-02-18 AU AU2009215530A patent/AU2009215530A1/en not_active Abandoned
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- 2009-02-18 WO PCT/US2009/034439 patent/WO2009105496A1/en active Application Filing
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- 2009-02-18 KR KR1020107019077A patent/KR101617896B1/ko active IP Right Grant
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US20090319048A1 (en) | 2009-12-24 |
WO2009105496A1 (en) | 2009-08-27 |
KR101617896B1 (ko) | 2016-05-03 |
AU2009215530A1 (en) | 2009-08-27 |
US9788955B2 (en) | 2017-10-17 |
CN102006839B (zh) | 2014-07-23 |
EP2254519B1 (en) | 2015-05-06 |
AU2015200785A1 (en) | 2015-03-12 |
JP5663118B2 (ja) | 2015-02-04 |
AU2015200785B2 (en) | 2017-04-20 |
US8337564B2 (en) | 2012-12-25 |
EP2254519A1 (en) | 2010-12-01 |
KR20100136451A (ko) | 2010-12-28 |
CN102006839A (zh) | 2011-04-06 |
US20090319049A1 (en) | 2009-12-24 |
EP2254519A4 (en) | 2014-02-19 |
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