JP5101597B2 - 多方向性のねじが切られた固定要素を含む骨安定化システム - Google Patents
多方向性のねじが切られた固定要素を含む骨安定化システム Download PDFInfo
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Description
〔発明の分野〕
本発明は、概して、手術に関するものである。より詳しくは、本発明は、プレートおよび締め付けねじを含む骨固定システムに関するものである。
長骨の骨幹端部分の骨折は、治療することが難しいことがある。治療が不適切であると、変形し、長期にわたる苦痛の種となることもある。
よって、本発明の目的は、プレートに対してねじを単一方向に固定することと、外科医が定めた方向に固定することの両方をサポートするプレートを備えた骨固定システム提供することである。
まず図1から図6を参照すると、本発明による骨折固定システム100が示されている。図示し、説明するシステム100は、特に、背側に転移した遠位橈骨骨折(すなわち、コーレス骨折)における複数の骨片を揃え安定させるように構成されているが、本発明は、後述するように、様々な骨折の治療に使用する他の整形外科用骨安定化システム(surgical orthopedic bone stabilization system)に応用することができる。
(1)骨固定システムにおいて、
骨接触面を有する実質的に剛体のチタン合金製プレートであって、雌ねじが設けられたねじ穴のセットを画定しており、前記ねじ穴の前記雌ねじが、各ねじ穴の軸を画定している、プレートと、
第1の種類の締め付けねじのセットであって、これらの各締め付けねじは、前記チタン合金よりも硬質のコバルトクロム合金製頭部を有しており、前記頭部は、前記第1の種類の締め付けねじを前記プレートに固定するために、前記各ねじ穴の軸に対して所定の傾斜角で所定の締め付けねじの穴の雌ねじ内にセルフタップ(self-tap)するように構成されている雄ねじを備えている、第1の種類の締め付けねじのセットと、
を含む、骨固定システム。
(2)実施態様1に記載の骨固定システムにおいて、
前記雄ねじおよび前記雌ねじは、同じ方向に螺旋状に延びている、骨固定システム。
(3)実施態様1に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじの前記雄ねじは、約90度のねじ山の角度を有する、骨固定システム。
(4)実施態様1に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじの前記頭部は、約8度のテーパーである、骨固定システム。
(5)実施態様1に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじの前記頭部は、二条ねじ山を備えている、骨固定システム。
前記第1の種類の各締め付けねじは、シャフトを含み、前記頭部および前記ねじの反対側の端部から離隔した前記シャフトの部分は、直径が縮小されている、骨固定システム。
(7)実施態様6に記載の骨固定システムにおいて、
前記シャフトは、骨に係合可能な遠位ねじ山を備えており、前記直径が縮小された部分は、前記頭部と前記遠位ねじ山との間に位置している、骨固定システム。
(8)実施態様1に記載の骨固定システムにおいて、
チタン合金製の第2の種類の固定用締め付けねじのセット、
をさらに含み、
これらの第2の種類の各固定用締め付けねじは、前記各ねじ穴の軸と整合して、前記プレートに対して固定角度で前記第2の種類の各固定用締め付けねじを固定するべく、所定のねじ穴の雌ねじに螺合するように構成された雄ねじを備えた頭部を有する、骨固定システム。
(9)実施態様8に記載の骨固定システムにおいて、
前記第1の種類の固定用締め付けねじおよび前記第2の種類の固定用締め付けねじのそれぞれは、ドライバースロットを有しており、前記第1の種類の固定用締め付けねじのドライバースロットは、前記第2の種類の固定用締め付けねじのドライバースロットよりも大きい断面積を有する、骨固定システム。
(10)実施態様8に記載の骨固定システムにおいて、
前記第2の種類の各締め付けねじは、その遠位端部と前記頭部との間にシャフトを有しており、この部分は、実質的に一定の直径を有しており、
前記第1の種類の各締め付けねじは、シャフトを有しており、このシャフトの離間した部分は、前記第1の種類の締め付けねじが前記第2の種類の締め付けねじの可撓性に近づくように直径が縮小されている、骨固定システム。
前記第1の種類の締め付けねじおよび前記第2の種類の締め付けねじはそれぞれ、実質的に等しい最大梁撓み率(maximum beam deflection)を有する、骨固定システム。
(12)実施態様10に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじの前記シャフトは、骨に係合可能な遠位ねじ山を備えており、前記直径が縮小された部分は、前記頭部と前記遠位ねじ山との間に位置している、骨固定システム。
(13)実施態様1に記載の骨固定システムにおいて、
前記ねじ穴の軸の少なくとも2つは、互いに対して傾斜している、骨固定システム。
(14)実施態様13に記載の骨固定システムにおいて、
前記ねじ穴の軸の少なくとも2つは、互いに対して2次元で傾斜している、骨固定システム。
(15)骨固定システムにおいて、
第1の硬度を有する第1の金属から形成された実質的に剛体のプレートであって、骨接触面を有し、雌ねじが設けられたねじ穴のセットを画定しており、前記ねじ穴の前記雌ねじが、各ねじ穴の軸を画定している、プレートと、
前記第1の硬度よりも実質的に高い第2の硬度を有する異なる第2の金属から形成された第1の種類の締め付けねじのセットであって、これらの各締め付けねじは、頭部およびシャフトを備えている、第1の種類の締め付けねじのセットと、
を含み、
前記頭部は、前記第1の種類の締め付けねじを前記プレートに固定するために前記各ねじ穴の軸に対して所定の傾斜角で所定の締め付けねじの穴の雌ねじ内にセルフタップするように構成されている雄ねじを備えており、
前記シャフトは、骨に係合可能な遠位ねじ山、およびこの遠位ねじ山の近位側のねじの無い部分を備えており、このねじの無い部分は、前記シャフトの残りのねじの無い部分に対して直径が縮小された部分を有する、骨固定システム。
第2の種類の固定用締め付けねじのセット、
をさらに含み、
これらの第2の種類の各固定用締め付けねじは、前記各ねじ穴の軸と整合して、前記プレートに対して固定角度で前記第2の種類の固定用締め付けねじを固定するべく、所定のねじ穴の雌ねじに螺合するように構成された雄ねじを備えた頭部を有する、骨固定システム。
(17)実施態様16に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじと前記第2の種類の締め付けねじの最大梁撓み率は、実質的に等しい、骨固定システム。
(18)実施態様16に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじは、前記第2の種類の締め付けねじの可撓性に近い可撓性を有する、骨固定システム。
(19)実施態様16に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじおよび前記第2の種類の固定用締め付けねじはそれぞれ、ドライバースロットを有しており、前記第1の種類の締め付けねじのドライバースロットは、前記第2の種類の固定用締め付けねじのドライバースロットよりも大きい断面積を有する、骨固定システム。
(20)骨固定システムにおいて、
第1の硬度を有する第1の金属から形成された実質的に剛体のプレートであって、骨接触面を有し、雌ねじが設けられたねじ穴のセットを画定しており、前記ねじ穴の前記雌ねじが、各ねじ穴の軸を画定している、プレートと、
前記第1の硬度よりも実質的に高い第2の硬度を有する異なる第2の金属から形勢された第1の種類の締め付けねじのセットであって、これらの各締め付けねじは、頭部およびシャフトを備えており、前記頭部は、前記第1の種類の締め付けねじを前記プレートに固定するために前記各ねじ穴の軸に対して所定の傾斜角で所定の締め付けねじの穴の雌ねじ内にセルフタップするように構成されている雄ねじを備えている、第1の種類の締め付けねじのセットと、
前記第1の金属から形成された第2の種類の固定用締め付けねじのセットであって、これらの第2の種類の各締め付けねじは、頭部およびシャフトを有しており、前記頭部は、前記各ねじ穴の軸と整合して、前記プレートに対して固定角度で前記第2の種類の固定用締め付けねじを固定するべく、所定のねじ穴の雌ねじに螺合するように構成された雄ねじを備えている、第2の種類の固定用締め付けねじのセットと、
を含み、
前記第1の種類の締め付けねじは、前記第2の種類の締め付けねじの可撓性に近い可撓性を有する、骨固定システム。
前記第1の種類の締め付けねじの前記シャフトと前記第2の種類の締め付けねじの前記シャフトの最大梁撓み率は、実質的に等しい、骨固定システム。
(22)実施態様20に記載の骨固定システムにおいて、
前記第1の金属は、チタン合金であり、前記第2の金属は、コバルトクロム合金である、骨固定システム。
(23)ねじ山が設けられた締め付けねじ用の少なくとも1つのねじ穴を有する骨プレート用の固定ねじにおいて、
頭部およびシャフトを有するコバルトクロムねじであって、前記頭部は、テーパーであり、180度ずれた二条ねじ山を備えており、前記シャフトは、前記ねじの反対側の端部および前記頭部の両方から離隔した直径が縮小された部分を有する、コバルトクロムねじ、
を含む、固定ねじ。
(24)実施態様23に記載の固定ねじにおいて、
前記頭部のテーパーの角度は、約8度である、固定ねじ。
(25)実施態様23に記載の固定ねじにおいて、
前記頭部の前記ねじ山は、約90度のねじ山の角度を有する、固定ねじ。
前記シャフトは、遠位ねじ山を備えており、前記直径が縮小された部分は、前記頭部と前記ねじ山との間に位置している、固定ねじ。
Claims (7)
- 骨固定システムにおいて、
骨接触面を有する実質的に剛体のプレートであって、雌ねじが設けられたねじ穴のセットを定めており、前記ねじ穴の前記雌ねじが、各ねじ穴の軸を定めている、プレートと、
第1の種類の締め付けねじのセットであって、前記第1の種類の締め付けねじの各々は頭部を有しており、前記頭部は、前記第1の種類の締め付けねじを前記プレートに固定するために、前記各ねじ穴の軸に対して、ある傾斜角で所与の締め付けねじの穴の前記雌ねじ内にセルフタップする雄ねじを備えている、第1の種類の締め付けねじのセットと、
第2の種類の固定用締め付けねじのセットと、
を含み、
前記第2の種類の固定用締め付けねじの各々は、前記各ねじ穴の軸と整合して、前記プレートに対して固定された角度で前記第2の種類の固定用締め付けねじの各々を固定するべく、所与のねじ穴の前記雌ねじに螺合するように構成された雄ねじを備えた頭部を有し、
前記プレートは、第1の硬度を有する第1金属から形成され、
前記第1の種類の締め付けねじは、前記第1の硬度よりも実質的に硬度の高い第2の硬度を有する、異なる第2金属から形成され、
前記第2の種類の固定用締め付けねじは、前記第1金属から形成され
前記第1の種類の締め付けねじの各々は、シャフトを含み、前記頭部および前記ねじの反対側の端部から離隔した前記シャフトの部分は、直径が縮小され、
前記第1の種類の締め付けねじの前記直径が縮小された部分によって、前記第1の種類の締め付けねじが前記第2の種類の固定用締め付けねじに劣らず可撓性を有する、骨固定システム。 - 請求項1に記載の骨固定システムにおいて、
前記第1金属は、チタン合金であり、前記第2金属は、コバルトクロム合金である、骨固定システム。 - 請求項1に記載の骨固定システムにおいて、
前記雄ねじおよび前記雌ねじは、同じ方向に螺旋状に延びている、骨固定システム。 - 請求項1に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじの前記雄ねじは、約90度のねじ山の角度を有する、骨固定システム。 - 請求項1に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじの前記頭部は、約8度でテーパー状になった、骨固定システム。 - 請求項1に記載の骨固定システムにおいて、
前記第1の種類の締め付けねじの前記頭部は、二条ねじ山を備えている、骨固定システム。 - 請求項1に記載の骨固定システムにおいて、
前記シャフトは、骨に係合可能な遠位ねじ山を備えており、前記直径が縮小された部分は、前記頭部と前記遠位ねじ山との間に位置している、骨固定システム。
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EP (1) | EP1996120B1 (ja) |
JP (1) | JP5101597B2 (ja) |
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-
2006
- 2006-03-20 US US11/384,773 patent/US7905909B2/en active Active
-
2007
- 2007-03-09 AU AU2007227098A patent/AU2007227098B2/en not_active Ceased
- 2007-03-09 CA CA2647067A patent/CA2647067C/en active Active
- 2007-03-09 EP EP07758216.1A patent/EP1996120B1/en not_active Not-in-force
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- 2007-03-09 JP JP2009501634A patent/JP5101597B2/ja not_active Expired - Fee Related
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2008
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EP1996120B1 (en) | 2015-07-01 |
US7905909B2 (en) | 2011-03-15 |
ZA200808914B (en) | 2012-02-29 |
CA2647067A1 (en) | 2007-09-27 |
AU2007227098B2 (en) | 2013-11-28 |
US20070088360A1 (en) | 2007-04-19 |
AU2007227098A1 (en) | 2007-09-27 |
WO2007109436A2 (en) | 2007-09-27 |
JP2009530052A (ja) | 2009-08-27 |
WO2007109436A3 (en) | 2008-02-28 |
EP1996120A2 (en) | 2008-12-03 |
CA2647067C (en) | 2015-05-19 |
EP1996120A4 (en) | 2011-06-15 |
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