JP2007519429A - 椎間板置換トライアル - Google Patents
椎間板置換トライアル Download PDFInfo
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- JP2007519429A JP2007519429A JP2006535380A JP2006535380A JP2007519429A JP 2007519429 A JP2007519429 A JP 2007519429A JP 2006535380 A JP2006535380 A JP 2006535380A JP 2006535380 A JP2006535380 A JP 2006535380A JP 2007519429 A JP2007519429 A JP 2007519429A
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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
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- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
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Abstract
Description
挿入プッシャー900のシャフト902は、好ましくは、長手方向穴804と同一の長さ(又は、例えば、少なくとも同一の長さ)を有している。従って、挿入ハンドルのシャフト802を挿入板700から取外すために、挿入プッシャー900のシャフト902が、挿入ハンドルのシャフト802の長手方向穴804内に挿入され、プッシャーシャフト902の丸い遠位端904が挿入板700のテーパ付きステム706の近位端と衝突するまで、長手方向穴804内において平行移動されることになる。挿入プッシャー900のシャフト902が挿入ハンドルのシャフト802の長手方向穴804と同一の長さを有しているので、挿入ハンドル800のフランジ810と挿入プッシャー900のフランジ908は、挿入ハンドルのシャフト802の遠位端806に係止されているステム706の部分の長さに相当する距離だけ離れている(図7dと図7eを参照)。従って、(例えば、外科医がフランジ810,908を互いに対して締め付けることによって)、フランジ810,908を重ねれば、挿入ハンドルのシャフト802の遠位端806と挿入板700のステム706との間の摩擦係止を解除し、治療領域内における頚椎椎間板置換装置400と挿入板700の組立体の配置を乱すことなく、挿入ハンドルのシャフト802を挿入板700から離脱させることが可能になる。
Claims (29)
- 椎間板置換トライアルにおいて、
近位端にハンドルを有するシャフトと、
前記シャフトの遠位端に配置されるヘッドであって、第1及び第2面を備え、前記第1及び第2面は、脊柱の隣接する椎骨対のそれぞれの終板によって画成される少なくとも1つの椎間腔内への挿入に適し、前記脊柱の長軸に沿った方向における前記椎骨の伸延の促進に適するように、互いに離間され、かつそのような寸法に形成されているようなヘッドと、
を備えていることを特徴とするトライアル。 - 前記第1面は、前記椎骨対の第1椎骨の終板との操作可能な係合に適する略楕円状の設置領域を備え、前記第2面は、前記椎骨対の第2椎骨の終板との操作可能な係合に適する領域を備えていることを特徴とする、請求項1に記載のトライアル。
- 前記第1面は、前記椎骨対の第1椎骨の終板との操作可能な係合に適する実質的に凸状の領域を備えていること、
前記第1面の前記実質的に凸状の領域は、前記第1椎骨の実質的に凹状の特徴を有する下側終板である前記第1椎骨の前記終板と操作可能に係合するような寸法と形状に形成されていること、
前記第2面は、前記椎骨対の第2椎骨の終板との操作可能な係合に適する実質的に平坦な領域を備えていること、及び
前記第2面の前記実質的に平坦な領域は、前記第2椎骨の実質的に平坦な特徴を有する上側終板である前記第2椎骨の前記終板と操作可能に係合するような寸法と形状に形成されていること、
の少なくとも1つであることを特徴とする、請求項1に記載のトライアル。 - 前記第1面は、前記少なくとも1つの椎間腔への前記ヘッドの挿入を促進するために、その遠位端に向かってテーパが付されていること、及び
前記第2面は、前記少なくとも1つの椎間腔への前記ヘッドの挿入を促進するために、その遠位端に向かってテーパが付されていること、
の少なくとも1つであることを特徴とする、請求項1に記載のトライアル。 - 前記第1面は約5°のテーパが付され、前記第2面は約4°のテーパが付されていることを特徴とする、請求項4に記載のトライアル。
- 前記ヘッドが前記椎骨対を押し拡げるのに用いられ得るように前記ヘッドと前記シャフトに剛性を与えるべく、前記シャフトから横方向に離れて延在し、かつ前記シャフトに沿って実質的に前記ヘッドに向かって長手方向に延在する少なくとも1つのリブをさらに備えていることを特徴とする、請求項1に記載のトライアル。
- 椎間板置換トライアルにおいて、
近位端にハンドルを有するシャフトと、
前記シャフトの遠位端に配置されるヘッドであって、脊柱の隣接する椎骨対のそれぞれの終板によって画成される少なくとも1つの椎間腔内に挿入されるように操作される互いに離間された第1及び第2面を備えるヘッドと、
前記脊柱の前記椎間腔への前記ヘッドの過剰な挿入を防ぐように機能する止め部材と、
を備えていることを特徴とするトライアル。 - 前記止め部材は、前記ヘッドから横方向に延在する止め要素を備え、前記止め要素は、前記椎骨の少なくとも1つと係合し、前記脊柱の前記椎間腔への前記ヘッドの過剰な挿入を防ぐような寸法に形成され、かつそのように配置されていることを特徴とする、請求項7に記載のトライアル。
- 前記止め要素は、前記椎骨対の下側の椎骨の少なくとも1つの前面と係合して前記脊柱の前記椎間腔への前記ヘッドの過剰な挿入を防ぐべく、前記ヘッドの前端から実質的に直交して延在することを特徴とする、請求項8に記載のトライアル。
- 椎間板置換トライアルの組において、各トライアルは、
近位端にハンドルを有するシャフトと、
前記シャフトの遠位端に配置されるヘッドであって、第1及び第2面を備え、前記第1及び第2面は、脊柱の隣接する椎骨対のそれぞれの終板によって画成される少なくとも1つの椎間腔内への挿入に適するように、互いに離間され、かつそのような寸法に形成されているようなヘッドと、
を備え、
前記トライアルの1つ以上は、(i)前記椎間腔内に配置される椎間板置換装置の適切な寸法を決定すること、及び(ii)前記脊柱の長軸に沿った方向に前記椎骨を伸延することの少なくとも1つを促進する異なる寸法のヘッド、
を有していることを特徴とするトライアルの組。 - 前記トライアルの少なくとも1つの実質的に前記第1面から前記第2面までを測定して得られたヘッド厚みは、前記トライアルの少なくとも他の1つのヘッド厚みと異なっていることを特徴とする、請求項10に記載のトライアルの組。
- 前記ヘッド厚みは、約1mmだけ異なっていることを特徴とする、請求項11に記載のトライアルの組。
- 前記トライアルの少なくとも1つのヘッドの四角形の面積は、前記トライアルの少なくとも他の1つのヘッドの四角形の面積と異なっていることを特徴とする、請求項10に記載のトライアルの組。
- 前記トライアルの少なくとも1つの実質的に前記第1面から前記第2面までを測定して得られたヘッド厚みは、前記トライアルの少なくとも他の1つのヘッド厚みと異なっていること、及び
実質的に同一のヘッド厚みを有する少なくとも2つのヘッドは、異なるヘッドの四角形の面積を有していること、
の少なくとも1つであることを特徴とする、請求項13に記載のトライアルの組。 - 1つ以上の椎間板置換装置をさらに備えていることを特徴とする、請求項13に記載のトライアルの組。
- 椎間板置換トライアルの組を用いる方法であって、各トライアルは、近位端にハンドルを有するシャフトと、前記シャフトの遠位端に配置されるヘッドとを備え、前記ヘッドは、第1及び第2面を備え、前記第1及び第2面は、脊柱の隣接する椎骨対のそれぞれの終板によって画成される少なくとも1つの椎間腔内への挿入に適するように、互いに離間され、かつそのような寸法に形成されるような方法において、
前記トライアルの組の第1トライアルを前記椎間腔の1つに挿入し、前記椎骨を前記脊柱の長軸に沿った方向において少なくともいくらか伸延するのを促進する段階と、
前記トライアルの組の第2トライアルを前記椎間腔に挿入し、前記椎骨を前記長軸に沿って少なくともさらに伸延するのを促進する段階であって、前記第2トライアルは、前記第1トライアルよりも、実質的に前記第1面から前記第2面までを測定して得られたヘッド厚みが大きいような段階と、
を少なくとも含むことを特徴とする方法。 - 前記椎骨の伸延を促進するために、前記第1及び第2トライアルの少なくとも1つの前記ハンドルを梃子運動させる段階をさらに含むことを特徴とする、請求項16に記載の方法。
- 前記椎骨を目標距離まで伸延するのを促進するために、さらに大きいヘッド厚みを有する更なるトライアルの挿入を繰り返す段階をさらに含むことを特徴とする、請求項16に記載の方法。
- 前記目標距離は、前記椎骨と関連する繊維輪と靭帯を実質的に保護しながら、前記椎間腔を実質的に可能な限り大きくする距離であることを特徴とする、請求項18に記載の方法。
- 前記椎間腔が前記目標距離まで伸延された後、椎間板置換装置を前記椎間腔に挿入する段階をさらに含むことを特徴とする、請求項16に記載の方法。
- 脊柱の椎間腔の椎間板の少なくとも一部を置換する方法であって、前記椎間腔は、隣接する第1及び第2椎骨のそれぞれの終板によって、少なくとも画成されるような方法において、
少なくとも1つの椎間板置換トライアルを前記椎間腔に挿入し、前記椎間腔を前記脊柱の長軸に沿った方向において伸延する段階と、
椎間板置換装置の第1及び第2部材を前記脊柱の椎間腔内に同時に挿入する段階と、
を含むことを特徴とする方法。 - 少なくとも1つの椎間板置換トライアルを挿入する前記段階は、椎間板置換トライアルの組を用いて、前記椎間腔を伸延する段階を含み、前記椎間板置換トライアルの少なくとも2つは、前記椎骨を前記長軸に沿って伸延するのを促進する異なるヘッド厚みを有していることを特徴とする、請求項21に記載の方法。
- 前記トライアルの組の第1トライアルを前記椎間腔に挿入し、前記第1及び第2椎骨の少なくともいくらか伸延するのを促進する段階と、
前記トライアルの組の第2トライアルを前記前記椎間腔に挿入し、前記第1及び第2椎骨を少なくともさらに伸延するのを促進する段階であって、前記第2トライアルは、前記第1トライアルよりも大きいヘッド厚みを有しているような段階と、
をさらに含むことを特徴とする、請求項22に記載の方法。 - 前記椎骨を目標距離まで伸延するのを促進するために、さらに大きいヘッド厚みを有する更なるトライアルの挿入を繰り返す段階であって、前記目標距離は、前記椎骨と関連する繊維輪と靭帯を実質的に保護しながら、前記椎間腔を実質的に可能な限り大きくする距離であるような段階をさらに含むことを特徴とする、請求項23に記載の方法。
- 前記第1及び第2椎骨を伸延するのを促進するために、前記少なくとも1つのトライアルの前記ハンドルを梃子運動させる段階をさらに含むことを特徴とする、請求項21に記載の方法。
- 前記椎間板置換装置の前記第1及び第2部材の第1及び第2関節面を、前記椎間腔内へ同時に挿入する間、実質的に互いに整合した状態に配列し、かつ維持する段階をさらに含むことを特徴とする、請求項21に記載の方法。
- 前記第1及び第2部材が、互いに対する配列を実質的に変化させることなく、前記椎間腔への挿入及び前記椎間腔内での移動の少なくとも1つを行ない得るように、前記第1及び第2部材を、挿入板を介入させることによって、単一ユニットとして操作する段階をさらに含むことを特徴とする、請求項26に記載の方法。
- 前記第1及び第2部材を単一ユニットとして操作するために、前記挿入板に離脱可能に係合するように適合された挿入ハンドルを用いる段階をさらに含むことを特徴とする、請求項27に記載の方法。
- 前記挿入ハンドル、挿入板、及び第1及び第2部材は、外科医に渡されるパッケージ内に含まれる殺菌した組立体の形態で、供給されることを特徴とする、請求項28に記載の方法。
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US10/688,632 US6896676B2 (en) | 2003-03-06 | 2003-10-17 | Instrumentation and methods for use in implanting a cervical disc replacement device |
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