JP2006517453A - 可動支持関節結合式の椎間板 - Google Patents
可動支持関節結合式の椎間板 Download PDFInfo
- Publication number
- JP2006517453A JP2006517453A JP2006503508A JP2006503508A JP2006517453A JP 2006517453 A JP2006517453 A JP 2006517453A JP 2006503508 A JP2006503508 A JP 2006503508A JP 2006503508 A JP2006503508 A JP 2006503508A JP 2006517453 A JP2006517453 A JP 2006517453A
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- JP
- Japan
- Prior art keywords
- indentation
- keel
- component
- flange
- modular
- 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
Links
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
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- A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
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- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
- A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
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Abstract
Description
椎間空間内へ挿入するための人工装置が提供される。人工装置は、その中に形成された第1のくぼみを有する第1の構成要素と、その中に形成された第2のくぼみを有する第2の構成要素とを有し、前記第1のくぼみが第1の構成要素のほぼ凹型のくぼみ表面を画定しており、前記第2のくぼみがほぼ平面状のくぼみ表面を画定しており、更に人工装置は第2のくぼみ表面と係合するように構成され第1および第2の構成要素の間の関節運動を許容する、第1のくぼみ表面と係合するように構成されている突起部材を備える。
別の実施形態では、椎間空間内へ挿入するためのモジュラー式人工装置が提供される。前記モジュラー式人工装置は、第1のくぼみ表面を画定している第1のくぼみが中に形成された第1の構成要素と、第2のくぼみ表面を画定している広くなるように形成されている第2のくぼみが中に形成された第2の構成要素と、第2のくぼみ表面と係合するため広くなるように形成されているフランジ部分および第1のくぼみ表面と係合するための凸型部分を有する突起部材とを備え、それによって突起部材の第1の構成要素および第2の構成要素との係合が、第1および第2の構成要素の間の少なくとも回転および平行運動を許容している。
脊椎すべり症などの変形の多くの場合、1つまたは複数の椎体が、他の椎骨または仙骨に対して変位されることがある。このような奇形では、前の位置から変位した椎体を再配置することによって、変位の量を減少させることが望ましい。脊椎すべり症の減少は、神経の障害および周囲の柔らかい組織への損傷を防止するために多大な注意を必要とする、技術を要求する手法でありうる。
いくつかの例では、脊椎すべり症の矯正が、前方アプローチによるのが望ましいことがある。図14〜図16を参照すると、本発明の代替となる実施形態による椎間関節結合式の人工関節210が示されている。人工関節210は、ほぼ縦方向軸Lに沿って延びており、第1の関節構成要素212および第2の関節構成要素214を備える。関節構成要素212、214は、隣接する椎体VU、VLの間の椎間空間Sのような、一対の隣接する椎体間の椎間空間内に配置するようなサイズおよび形状にされた人工関節210を形成するために協働する。
いくつかの例では、神経根、硬膜、黄色靭帯および棘間靭帯などの重要な解剖学的構造の潜在的な損傷のため、障害のある椎間板空間に侵入して除去することが困難であることがよくある。たとえば靭帯構造の保存は、セグメントおよびその隣接する対応部分の生体機械的安定性を回復するために極めて重要である。これらの状況では、経椎間孔アプローチにより、片側に神経孔を開けることによって椎間板空間全体のクリアランスが可能となる。適切なクリアランスの後、後方突起間伸延によって、椎間区画のさらなる拡大を達成することが可能である。この手法は、経椎間孔腰椎椎体間固定術、すなわちTILFなどの固定技術のために使用されているが、今まで運動保存インプラントとともに使用されていなかった。
神経根、硬膜、黄色靭帯および棘間靭帯などの重要な解剖学的構造の潜在的な損傷回避するために使用されることができる別のアプローチは、前方傾斜アプローチである。たとえば、椎骨L4およびL5の間の椎間空間、ならびに上側の椎間板レベルへの直線的な前方アプローチには、主要な血管が脊柱の前側に付着しているため、全椎間板代替インプラントの挿入中、高い外科的リスクが存在することがある。
別の実施形態では、上記で説明した人工関節が、平行運動ならびに回転運動を可能にするように改良される。たとえば、図45〜図47を参照すると、前方挿入のための可動支持人工関節が全体的に符号700によって示されている。可動支持人工関節700は、わかりやすくするためだけに前方挿入に関して説明されており、したがって、様々な挿入方向が可動支持人工関節のために企図されることを理解されたい。
Claims (27)
- その中に形成された第1のくぼみを有し、前記第1のくぼみが第1の構成要素のほぼ凹型のくぼみ表面を画定している第1の構成要素と、その中に形成された第2のくぼみを有し、前記第2のくぼみがほぼ平面状のくぼみ表面を画定している第2の構成要素と、前記第2のくぼみ表面と係合するように構成され、前記第1および第2の構成要素の間の関節運動を許すために前記第1のくぼみ表面と係合するように構成されている突起部材とを備える、椎間空間内へ挿入するための人工装置。
- 前記第1のくぼみが、前記第1の構成要素の第1の関節結合表面内に形成され、前記第2のくぼみが、前記第2の構成要素の第2の関節結合表面内に形成されている、請求項1記載の人工装置。
- 前記平面状のくぼみ表面が、前記第2の構成要素の前記第2の関節結合表面から離隔された関係にある、請求項2記載の人工装置。
- 前記第2のくぼみが、前記第2の関節結合表面から前記平面状のくぼみ表面へ広くなるように形成されている、請求項3記載の人工装置。
- 前記突起部材が、突起部分とフランジ部分とを備え、前記フランジ部分が、前記突起部分から前記フランジ部分の遠端部へ広くなるように構成されており、それによって前記フランジ部分の係合表面を画定している、請求項3記載の人工装置。
- 前記係合表面が、前記平面状のくぼみ表面と係合するように構成され、前記係合表面が、前記突起部材の前記第2の構成要素に対する平行運動を許容するために前記平面状のくぼみ表面よりも小さい、請求項5記載の人工装置。
- 前記突起部分が凸型であり、前記第1および第2の構成要素の間の回転および枢動運動を許すために前記凹型くぼみ表面と係合するように構成されている、請求項6記載の人工装置。
- 前記第1の構成要素が、前記第1の関節結合表面と対向する関係にある第1の支持表面と、前記第1の支持表面から延びている第1のフランジとを備え、前記第1のフランジが第1の椎骨と係合するように構成されている、請求項2記載の人工装置。
- 前記第2の構成要素が、前記第2の関節結合表面と対向する関係にある第2の支持表面と、前記第2の支持表面から延びている第2のフランジとを備え、前記第2のフランジが第2の椎骨と係合するように構成されている、請求項8記載の人工装置。
- 前記第1のフランジが、前記第1の椎骨内の予め形成された開口内に配置されるように構成されている、請求項8記載の人工装置。
- 前記第2のフランジが、前記第2の椎骨内の予め形成された開口内に配置されるように構成されている、請求項9記載の人工装置。
- 前記第1のフランジが、骨成長促進物質で被覆され、それを通る少なくとも1つの開口を備える、請求項8記載の人工装置。
- 前記第2のフランジが、骨成長促進物質で被覆され、それを通る少なくとも1つの開口を備える、請求項9記載の人工装置。
- 前記第1の構成要素が、その中に形成された1対の切欠きを備え、前記切欠きが、前記第1のフランジとほぼ平行な方向に前記第1の構成要素内に形成されている、請求項8記載の人工装置。
- 前記第2の構成要素が、その中に形成された1対の切欠きを備え、前記切欠きが、前記第2のフランジとほぼ平行な方向に前記第2の構成要素内に形成されている、請求項9記載の人工装置。
- その中に形成された第1のくぼみを有し、前記第1のくぼみが第1のくぼみ表面を画定している第1の構成要素と、その中に形成された広くなるように形成されている第2のくぼみを有し、前記第2のくぼみが第2のくぼみ表面を画定している第2の構成要素と、前記第2のくぼみ表面と係合するための広くなるように形成されているフランジ部分および前記第1のくぼみ表面と係合するための凸型部分を有する突起部材とを備え、それによって前記突起部材の前記第1の構成要素および前記第2の構成要素との係合が、前記第1および前記第2の構成要素の間の少なくとも回転および平行運動を許容する、椎間空間内へ挿入するためのモジュラー式人工装置。
- 人工装置の一部分を形成するためのモジュラー式人工部材であって、その中に形成された広くなるように形成されているくぼみを有する第1のモジュラー部分と、前記くぼみと係合するためのフランジ部分を有する第2のモジュラー部分とを備え、それによって前記モジュラー式人工部材が、前記第2のモジュラー部分を介して別の人工部材と係合するように構成されている、人工装置の一部分を形成するためのモジュラー式人工部材。
- 前記くぼみが、前記第1のモジュラー部分の第1の表面内に形成されている、請求項17記載のモジュラー式人工部材。
- 前記くぼみが、前記第1のモジュラー部分の前記第1の表面から離隔された関係にあるくぼみ表面を備える、請求項18記載のモジュラー式人工部材。
- 前記くぼみが、前記第1の表面から前記くぼみ表面へ広くなるように形成されている、請求項19記載のモジュラー式人工部材。
- 前記第2のモジュラー部分が突起部分をさらに備え、前記フランジ部分が、前記突起部分から前記フランジ部分の遠端部へ広くなるように形成されており、それによって前記フランジ部分の係合表面を画定している、請求項19記載のモジュラー式人工部材。
- 前記係合表面が、前記くぼみ表面と係合するように構成され、前記係合表面が、前記第2のモジュラー部分の前記第1のモジュラー部分に対する平行運動を許容するために前記くぼみ表面よりも小さい、請求項21記載のモジュラー式人工部材。
- 前記係合表面が円形であり、前記くぼみ表面が円形である、請求項22記載のモジュラー式人工部材。
- その中に形成された第1のくぼみを有する第1の構成要素と、その中に形成された広くなるように形成されている第2のくぼみを有する第2の構成要素と、それらの間の関節運動を許容するために前記第1および第2の構成要素のそれぞれと係合するように構成された突起部材とを有する人工装置を提供するステップと、
前記人工装置を第1の椎体と第2の椎体の間に画定された椎間空間内へ挿入するステップとを含む、
1対の椎体の間の関節運動を回復するための方法。 - 前記第1および第2の構成要素のそれぞれにフランジを設けるステップであって、前記第1のフランジが前記第1の椎体を貫通するように構成され、前記第2のフランジが前記第2の椎体を貫通するように構成されているフランジを設けるステップをさらに含む、請求項24記載の方法。
- 前記第1および第2の椎体のそれぞれの中に開口を形成するステップをさらに含む、請求項24記載の方法。
- 前記第1および第2の構成要素のそれぞれにフランジを設けるステップであって、前記第1のフランジが前記第1の開口と係合するように構成され、前記第2のフランジが前記第2の開口と係合するように構成されているフランジを設けるステップをさらに含む、請求項26記載の方法。
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