JP5236855B2 - 脊椎固定方法および装置 - Google Patents
脊椎固定方法および装置 Download PDFInfo
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- JP5236855B2 JP5236855B2 JP2002537176A JP2002537176A JP5236855B2 JP 5236855 B2 JP5236855 B2 JP 5236855B2 JP 2002537176 A JP2002537176 A JP 2002537176A JP 2002537176 A JP2002537176 A JP 2002537176A JP 5236855 B2 JP5236855 B2 JP 5236855B2
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Description
本発明は、2000年10月24日付で出願された米国仮出願第60/424,794号の利益を主張し、その全体を参照することによって本明細書に含まれる。
本発明は、一般的に、脊椎を安定化する方法および装置に関する。より特定には、本発明は、隣接した脊椎骨を固定し、脊椎骨成長を局在化する方法および装置を提供する。
骨誘導性組成物と徐放性担体とを混合することによって、脊椎固定術中における望ましくない位置での骨形成を効果的に減少させ得ることがわかった。例えば、徐放性担体は、添加された骨誘導性組成物が、処理部位に隣接した組織、例えば、固定が望まれる部位から離れた、または隣接した血腫部位、瘢痕組織または他の線維組織に移動することを防ぐことができる。従って、本発明の一つの観点は、椎体間固定術において、隣接した脊椎骨を固定する方法、またあるいは、骨成長を局在化する方法を提供する。当該方法は、すでに局所的な血腫または瘢痕組織を示す処理部位、または、それに関する臨床的素因を示す処理部位に、特に有利である。椎間板の隙間を前処理する間、血腫部位または瘢痕組織部位を露出させることができ、または、拡散性の骨誘導因子によって誘導される骨組織成長に関する素因について評価することができる。一実施形態において、骨誘導性組成物と担体との複合体は、望ましい処理部位で骨成長を促進し、限定するように配合させることができる。他の実施形態において、骨誘導性組成物が保持されるように、埋込物を有利に配合し、構成することができる。それゆえに、骨誘導性組成物は、埋込物により提供および運搬され、埋込物からの骨誘導性組成物の望ましくない移動を最小化する。
本発明の原理の理解を促進するために、ここでは実施形態に対して参考文献が示されており、特定の用語は同一物を説明するものとして用いられる。なお、それにより本発明の範囲を限定することは意図されておらず、本発明に関連する当業者が通常想到し得るような本発明の変更やさらなる改変、および、本明細書で説明したような本発明の原理のさらなる用途が予想される、と考えられる。
この実施例は、アカゲザルで実施された、本明細書で説明された骨代用組成物を用いた後外側固定により、骨代用組成物が占める体積に限定された新しい骨形成が起こったことを示す。
2匹のアカゲザルからなる群を2つ用いて、後側方横突起固定術(posterolateral transverse process fusion)を行った。その群の1つは、標準のα−骨代用材料(標準のα−BSM:登録商標)、市販のリン酸カルシウムセメント(Etex社(Cambridge, MA)から購入)からなる担体中にrhBMP−2を受け入れた。この標準材料は、40%の微孔質を含む。もう一方の群は、改変α−BSM:登録商標(Etex社から購入した骨代用材料であり、40%を超過する多孔度を有する)の担体中にrhBMP−2を受け入れた。この第二の群において、脊椎の左側を、80%の多孔度を有するα−BSM:登録商標の担体に含まれるrhBMP−2で処理し(上記多孔度は、液含量を増やすことによって増加した)、脊椎の右側を、標準のα−BSM:登録商標にコラーゲン線維を添加してから、約80%の多孔度を有するα−BSM:登録商標で処理した。固定の程度を、コンピューター断層撮影法(CT)およびX線分析で観察した。
Genetics Institute(Cambridge MA)から得た緩衝液(pH4.5)に、rhBMP−2を添加した。そのrhBMP−2溶液を針とシリンジで添付のバイアルから取り出し、α−BSM:登録商標の乾燥粉末を含むプラスチック製の混合用「バルブ」に注入した。次に、パテ状の軟度を有する混合物が得られるまで、手動でプラスチック製バルブを約2〜3分間練ることによってその粉末を混合した。バルブの先端を切り取り、そのパテ物質を、それぞれの脊椎の後外側固定部位に適用またあるいは投与した。rhBMP−2濃度は、2.1mgBMP/ml担体であった。約15ngのBMPと約7mlのパテ状物質とを含む複合体を、脊椎のそれぞれの側に用いた。
全ての研究された動物において固定が達成され、さらに、新しい骨形成が、横突起を横切って埋め込まれた骨代用材料の形に限定されたことがわかった。図1は、埋め込み後2、4および6ヶ月における、処理された横突起部位の3つの異なるレベルで撮影された連続CTスキャン画像であり、第一のセットは、標準Etex担体中のrhBMP−2で処理されたサルに関する。同様に、図2は、埋め込み後2、4および6ヶ月における、処理された横突起部位の3つの異なるレベルで撮影された連続CTスキャン画像であり、第二のセットは、改変Etex担体中のrhBMP−2で処理されたサルに関する。図1および2を解析したところ、固定した集合体の形およびサイズが、長期間そのままであることが観察され、これは、担体がその基材中にBMPを保持することを示す。担体が表面から内部へ吸収されるため、担体は新しい骨で置換され、それにより正確に制御された骨形成を実現される。
α−BSMおよびACSからのrHBMP−2の放出の動力学を、ウサギ尺骨の骨切り術で評価した。ウサギ尺骨の骨切り術において、l25I−rhBMP−2/α−BSMまたは125IrhBMP−2/ACSの製品を外科的に埋め込んだ。手術後できる限りすぐに、埋込部位の放射活性を評価した。加えて、その後、定期的に(すなわち術後1、2、3、4、7、14および21日目に)評価した。
([2×上清CPM]+総CPM)×100
Claims (5)
- 脊椎骨固定装置であって、
隣接する脊椎骨を固定するための部位に骨を形成するために骨成長を導入するのに有効な量で存在する骨誘導性組成物を含む組成物であって、該骨誘導性組成物は生分解性担体内に同伴され、当該担体は、埋め込まれるとき、形成した骨が担体の体積に実質的に限定されるように該骨誘導性組成物のインビボでの流出に対して不浸透性であり、該担体が分解されまたは吸収されるにつれて当該担体は徐々に同伴する骨誘導性組成物を露出し、さらに骨誘導性組成物が担体1ml当たり0.5mg〜4mgの量で存在するrhBMP−2を含み、前記部位に適用される骨誘導組成物の量は2mg〜40mgrhBMP−2を運搬するのに充分な量であり、前記生分解性担体が吸収性コラーゲンスポンジからなる、組成物を含む脊椎骨固定装置。
- 椎骨間固定装置をさらに含む請求項1に記載の脊椎骨固定装置。
- 椎骨間固定装置がチャンバーを有する脊椎ケージを含み、ここで、場合により、骨誘導性組成物が脊椎骨固定ケージのチャンバー中に配置されている、請求項2に記載の脊椎骨固定装置。
- rhBMP−2が担体1ml当たり1mg〜3mgの量で存在する、請求項1〜3のいずてかに記載の脊椎骨固定装置。
- rhBMP−2が担体1ml当たり少なくとも2mgの量で存在する、請求項4に記載の脊椎骨固定装置。
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US24279400P | 2000-10-24 | 2000-10-24 | |
US60/242,794 | 2000-10-24 | ||
PCT/US2001/046044 WO2002034116A2 (en) | 2000-10-24 | 2001-10-24 | Spinal fusion methods and devices |
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JP2010106550A Division JP2010214123A (ja) | 2000-10-24 | 2010-05-06 | 脊椎固定方法および装置 |
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CA (1) | CA2426406A1 (ja) |
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JP2013116324A (ja) * | 2007-04-17 | 2013-06-13 | Board Of Trustees Of The Leland Stanford Jr Univ | ヒドロゲル関節形成装置 |
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US20030225021A1 (en) * | 2001-11-14 | 2003-12-04 | Mckay William F. | Methods of inducing the expression of bone morphogenetic proteins (BMPs) and transforming growth factor-beta proteins (TGF-betas) in cells |
NO316115B1 (no) * | 1997-12-10 | 2003-12-15 | Akva As | Fremgangsmåte og anordning for dosert utmating av et kornet, pelletert eller granulert massegods ut av en beholder |
US7435260B2 (en) * | 1999-08-13 | 2008-10-14 | Ferree Bret A | Use of morphogenetic proteins to treat human disc disease |
US7504374B2 (en) * | 2000-10-24 | 2009-03-17 | Warsaw Orthopedic, Inc. | Method for inducing deposition and maturation of bone comprising a co-therapeutic regimen of LMP-1 and BMP-2 |
US20020114795A1 (en) | 2000-12-22 | 2002-08-22 | Thorne Kevin J. | Composition and process for bone growth and repair |
US7166133B2 (en) | 2002-06-13 | 2007-01-23 | Kensey Nash Corporation | Devices and methods for treating defects in the tissue of a living being |
EP1610740A4 (en) * | 2003-04-04 | 2009-04-08 | Theken Disc Llc | ARTIFICIAL DISC PROSTHESIS |
CA2545185A1 (en) * | 2003-11-07 | 2005-05-26 | Calcitec, Inc. | Spinal fusion procedure using an injectable bone substitute |
CN1934123A (zh) * | 2004-04-13 | 2007-03-21 | Sdgi控股股份有限公司 | 骨诱导蛋白和多肽的细胞内传递 |
US7749268B2 (en) * | 2004-05-26 | 2010-07-06 | Warsaw Orthopedic, Inc. | Methods for treating the spine |
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JP2013116324A (ja) * | 2007-04-17 | 2013-06-13 | Board Of Trustees Of The Leland Stanford Jr Univ | ヒドロゲル関節形成装置 |
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EP2085055A1 (en) | 2009-08-05 |
ATE417577T1 (de) | 2009-01-15 |
ES2319506T3 (es) | 2009-05-08 |
AU2005203606B2 (en) | 2009-01-08 |
JP2010214123A (ja) | 2010-09-30 |
ES2384405T3 (es) | 2012-07-04 |
EP1335686A4 (en) | 2005-06-01 |
JP2004512079A (ja) | 2004-04-22 |
CA2426406A1 (en) | 2002-05-02 |
WO2002034116A3 (en) | 2003-02-27 |
EP1335686B1 (en) | 2008-12-17 |
DE60137073D1 (de) | 2009-01-29 |
EP2085055B1 (en) | 2012-06-06 |
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