JP2009504270A - モノブロックのセラミック寛骨臼カップを有する人工股関節 - Google Patents
モノブロックのセラミック寛骨臼カップを有する人工股関節 Download PDFInfo
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- JP2009504270A JP2009504270A JP2008526230A JP2008526230A JP2009504270A JP 2009504270 A JP2009504270 A JP 2009504270A JP 2008526230 A JP2008526230 A JP 2008526230A JP 2008526230 A JP2008526230 A JP 2008526230A JP 2009504270 A JP2009504270 A JP 2009504270A
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- Prior art keywords
- acetabular cup
- ceramic material
- shaped
- ceramic
- relatively high
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Abstract
Description
本発明にしたがうと、改良された人工股関節は、適合性のあるセラミック材料または金属材料から構成され得るボール形状の大腿コンポーネントとの磨耗が極めて少ない連結のための、比較的高い強度および比較的高い靭性のセラミック材料から構成された寛骨臼カップのベアリングコンポーネントを含んでいる。1つの形式において、寛骨臼カップは、自然な患者の骨成長の付着を固定するためのセラミックの有孔率の骨成長表面をさらに含んでいる。
例示的な図面に示されているように、図2〜図3における参照番号10によって1つの好適な形式で概略的に参照されている改良された人工股関節は、比較的硬く高強度のセラミック材料から構成された寛骨臼カップ12を含んでおり、これはまた、患者の骨に対する取り付けを固定するために、比較的有孔率の高いセラミックの骨の内部成長表面14をも組み込んでいる。カップ12は、その他の人工器官コンポーネント、例えば、適合性があって好適には同じセラミック材料または生体適合金属材料(図4)のような、硬く高強度の材料から構成され得るボール形状のコンポーネント16と連結するように設計されている。結果として生じるセラミックオンセラミックまたはセラミックオンメタルの連結界面は、有利にも長い耐用年数にわたって極めて少ない磨耗を示す一方で、追加的に、伝統的な重合体をベースとしたベアリングインサートおよびそれに関連する磨耗屑の問題を排除することを可能にする。
Claims (22)
- ほぼ貝殻形状の寛骨臼カップであって、患者の自然な寛骨球の内部に収容され係合するように構成されたサイズおよび形状を有している凸状の上側部、ならびに下向きに開き、咬み合う形状の大腿コンポーネントに連結して受容するようなサイズおよび形状を有している連結表面によって内張りされているほぼ部分的に球形状のキャビティを定義している下側部を定義している、ほぼ貝殻形状の寛骨臼カップ
を含んでおり、該寛骨臼カップは、該咬み合う形状の大腿コンポーネントとの移植後の連結による磨耗が極めて少量になるように、比較的高い曲げ強度および比較的高い破壊靱性を有するセラミック材料から形成されている、人工股関節。 - 前記セラミック材料は、約500メガパスカル(MPa)以上の比較的高い曲げ強度、および約5メガパスカルルートメートル(MPam0.5)以上の比較的高い破壊靭性を有している、請求項1に記載の人工股関節。
- 前記セラミック材料は、約700メガパスカル(MPa)以上の比較的高い曲げ強度、および約7メガパスカルルートメートル(MPam0.5)以上の比較的高い破壊強度を有している、請求項1に記載の人工股関節。
- 前記セラミック材料は、ドープされた窒化シリコンを含んでいる、請求項3に記載の人工股関節。
- 前記寛骨臼カップの前記凸状の上側部の上の骨成長表面をさらに含んでいる、請求項1に記載の人工股関節。
- 前記骨成長表面は、セラミックの骨成長表面を含んでいる、請求項1に記載の人工股関節。
- 前記寛骨臼カップは、可変の有孔率の勾配を有しているセラミック材料を含んでおり、該可変の有効率の勾配は、前記連結表面を定義する基質を形成する比較的低い有孔率の第1の領域、および前記セラミックの骨成長表面を定義する比較的高い有孔率の第2の領域を定義しており、該第1および第2の領域は、一体的に形成されている、請求項6に記載の人工股関節。
- 前記セラミック材料は、体積で約2%〜約80%の範囲の有孔率の勾配を有しており、前記高い有孔率の領域は、体積で約30%〜約80%の範囲のより高い有孔率を有している、請求項7に記載の人工股関節。
- 前記セラミック材料は、該セラミック材料に形成された孔を有しており、孔のサイズは、約100ミクロン〜約500ミクロンの範囲である、請求項8に記載の人工股関節。
- 前記咬み合うような形状の大腿コンポーネントは、ボール形状の大腿ヘッドを含んでいる、請求項1に記載の人工股関節。
- 前記大腿ヘッドは、セラミック材料から形成されている、請求項10に記載の人工股関節。
- 前記大腿ヘッドは、前記寛骨臼カップのセラミック材料と実質的に同じセラミック材料から形成されている、請求項10に記載の人工股間節。
- 前記大腿ヘッドは、生体適合性金属から形成されている、請求項10に記載の人工股関節。
- 前記寛骨臼カップを前記大腿ヘッド上に移動可能なように支持する支持装置をさらに含んでいる、請求項10に記載の人工股関節。
- ほぼ貝殻形状の寛骨臼カップであって、下向きに開き、ほぼ部分的に球形のキャビティを定義しており、該ほぼ部分的に球形のキャビティは、咬み合う形状の大腿コンポーネントに連結して受容するようなサイズおよび形状を有している連結表面によって内張りされている、ほぼ貝殻形状の寛骨臼カップ
を含んでおり、該寛骨臼カップの該連結表面は、該咬み合う形状の大腿コンポーネントとの移植後の連結による磨耗が極めて少量になるように、比較的高い曲げ強度および比較的高い破壊靱性を有するセラミック材料から形成されており、
該寛骨臼カップは、その上に有孔性の骨成長表面を有する凸状の上側部をさらに定義しており、患者の自然な寛骨臼の内部に収容され係合するように構成されたサイズおよび形状をさらに定義している、人工股関節。 - 前記寛骨臼カップは、可変の有効率の勾配を有しているセラミック材料を含んでおり、該可変の有効率の勾配は、前記連結表面を定義する基質を形成する比較的低い有孔率の第1の領域、および前記骨成長表面を定義する比較的高い有孔率の第2の領域を定義しており、該第1および第2の領域は、一体的に形成されている、請求項15に記載の人工股関節。
- 前記咬み合うような形状の大腿コンポーネントは、ボール形状の大腿ヘッドを含んでいる、請求項15に記載の人工股関節。
- 前記大腿ヘッドは、前記寛骨臼カップのセラミック材料と実質的に同じセラミック材料から形成されている、請求項17に記載の人工股関節。
- 前記大腿ヘッドは、生体適合性金属から形成されている、請求項17に記載の人工股関節。
- ほぼ貝殻形状の寛骨臼カップであって、患者の自然な寛骨臼の内部に収容され係合するように構成されたサイズおよび形状を有している凸状の上側部、ならびに下向きに開き、咬み合う形状の大腿コンポーネントに連結して受容するようなサイズおよび形状を有している連結表面によって内張りされているほぼ部分的に球形状のキャビティを定義している下側部を定義している、ほぼ貝殻形状の寛骨臼カップ
を含んでおり、該寛骨臼カップは、該咬み合う形状の大腿コンポーネントの移植後の連結による磨耗が極めて少量になるように、比較的高い曲げ強度および比較的高い破壊靱性を有するセラミック材料から形成されており、
該寛骨臼カップは、動作範囲を増大させるための窪んだ幾何学的形状を有するリムを有している、人工股関節。 - 前記リムは、動作範囲を増大させるために該リムに形成された複数の窪みを含んでいる、請求項20に記載の人工股関節。
- 前記リムは、動作範囲を増大させるために該リムに形成された一対の直径に関してほぼ対向する窪みを含んでいる、請求項20に記載の人工股関節。
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US11/203,047 US7695521B2 (en) | 2001-05-01 | 2005-08-12 | Hip prosthesis with monoblock ceramic acetabular cup |
PCT/US2006/031379 WO2007021936A2 (en) | 2005-08-12 | 2006-08-10 | Hip prosthesis with monoblock ceramic acetabular cup |
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US20100228354A1 (en) | 2010-09-09 |
EP1922033A2 (en) | 2008-05-21 |
JP5011296B2 (ja) | 2012-08-29 |
US8133284B2 (en) | 2012-03-13 |
WO2007021936A2 (en) | 2007-02-22 |
EP1922033A4 (en) | 2013-06-19 |
US20050273176A1 (en) | 2005-12-08 |
WO2007021936A3 (en) | 2007-06-21 |
US7695521B2 (en) | 2010-04-13 |
US20120136454A1 (en) | 2012-05-31 |
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