JPH11513598A - 圧縮性成形中空部材を有する椎骨間移植体 - Google Patents

圧縮性成形中空部材を有する椎骨間移植体

Info

Publication number
JPH11513598A
JPH11513598A JP9516102A JP51610297A JPH11513598A JP H11513598 A JPH11513598 A JP H11513598A JP 9516102 A JP9516102 A JP 9516102A JP 51610297 A JP51610297 A JP 51610297A JP H11513598 A JPH11513598 A JP H11513598A
Authority
JP
Japan
Prior art keywords
bone contacting
implant
hollow
lower bone
implant according
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
Application number
JP9516102A
Other languages
English (en)
Inventor
インガ クノテ
アルフレッド ベノイト
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AO Technology AG
Original Assignee
Synthes AG Chur
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Synthes AG Chur filed Critical Synthes AG Chur
Publication of JPH11513598A publication Critical patent/JPH11513598A/ja
Pending legal-status Critical Current

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Neurology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

(57)【要約】 椎骨間移植体は平らにされた上部骨接触面３、平らにされた下部骨接触面４及び二つの側面５を含む外表面２を有する、中空円筒、中空円錐台、中空平頭ピラミッドまたは中空平頭くさびの形状の平らにされた成形中空部材１からなる。上部及び下部の骨接触面３、４は、上部及び下部の骨接触面３、４の最大距離Ｈが0.5 〜5.0 mmだけ減少し得るように、部材１の内部チャンバー６に向かって弾性圧縮し得る。

Description

【発明の詳細な説明】 圧縮性成形中空部材を有する椎骨間移植体 本発明は請求の範囲第１項に記載の椎骨間移植体に関する。 このような椎骨間移植体は、特に脊柱の腰部付近の椎体の融着の場合に使用さ れる。椎骨間の間隙当たり、１個〜２個の移植体が使用される。 従来技術により、下記の欠点を示すこのような椎骨間移植体の異なる型が既に 知られている。 −移植体を椎骨間の間隙に挿入するために、夫々の椎骨が適当な装置により拡げ られる必要があり、かつ −移植体が夫々の椎骨の終板に沈むという危険にさらされる。 ここで、本発明は改善を与えるであろう。本発明は拡張装置を用いないで調節 可能な様式できれいにされた椎骨間の間隙に挿入可能である椎骨間移植体を製造 する仕事に基づいている。 この問題の解決のために、最初に記載された配置は独立の請求の範囲第１項の 特徴項部分の特徴により更に形成される。 平らにされた中空部材は中空円筒、中空円錐台、中空平頭ピラミッドまたは中 空平頭くさびの形状を有することができる。 寸法、形状及び材料は、上部及び下部の骨接触面の間の最大距離Ｈが0.5 〜5. 0 mm、好ましくは１〜３mmだけ減少し得るように選ばれるべきである。 上部及び下部の骨接触面の12ニュートンの圧力の力の適用の場合、最大距離Ｈ は15％〜30％、好ましくは20％〜25％だけ減少し得るべきである。移植体の圧縮 性は、拡張装置を適用する必要なく、その挿入を可能にする。 それにより、力の最小の消費が移植に必要であり、圧縮された移植体の調節可 能な挿入が可能であるという利点が得られる。最小の観血的かつ開放手術技術が それにより適用可能である。 移植体の大きい支持領域は終板へのその沈みを阻止する。 本発明の好ましい実施態様は、中空部材の内部間隙中に、インターロック手段 にかみ合い可能であるかみ合いリップが用意されることからなる。かみ合ったか み合いリップの場合、中空部材の圧縮性は再び奪われ、その結果、通常の硬質移 植体となる。 骨スプリンターまたは骨交換材料が前後に開いた中空部材の内部間隙に容易に 装填でき、移植体が手術工程を殆ど必要としないでしっかりと取付けられる。 骨の迅速な内部成長（Einwachsen）を進行させるために、この移植体は、好ま しくは長さ方向の孔の形態の、多孔を備えていることが好適である。長さ方向の 孔はＸ線に対し透過性ではない材料の場合にＸ線像による骨の内殖の調節を可能 にする。 移植体の位置の安定性の改良のために、上部及び／または下部の骨接触面は、 好ましくは長さ方向の溝の形態の三次元組織を備えている。 従来技術と較べて、本発明の移植体の下記の更に別の利点が生じる。 −滑りに対する安全； −Ｘ線に対する改良された透過性；及び −移植体の増進された弾性。 本発明及び本発明の更に別の実施態様が、本発明の１つの実施態様の部分略図 により以下に更に詳しく説明される。 図１はゆるんだかみ合わせリップを含む圧縮可能な状態の本発明の移植体の斜 視図を示し、また 図２はかみ合わされたかみ合わせリップを含む非圧縮状態の図１の移植体の断 面を示す。 図１及び２に示された椎骨間移植体は中空円筒の形状の中空部材１から実質的 になり、その外表面２は平らにされた上部骨接触面３、平らにされた下部骨接触 面４及び二つの側面５からなる。 移植体は適当な金属（即ち、チタン）で加工されてもよいが、特にまたポリエ チレンのような生体に許容される合成材料で加工されてもよい。 上部及び下部の骨接触面３及び４は中空部材１の内部間隙６に向かって弾性圧 縮可能であり、その結果、上部及び下部の骨接触面３及び４の最大距離Ｈが典型 的には２mmだけ減少可能である。これは椎骨間間隙への移植体の容易な挿入を可 能にする。 側面５は長さ方向の孔の形状のくぼみを備えており、合成材料を使用する場合 にはこれらは省かれてもよい。上部骨接触面３及び／又は下部骨接触面４は多孔 ８を備えているだけでなく、中央溝９を備えている。 中空部材１の内部間隙６中に、かみ合わせリップ10が用意され、これはインタ ーロック手段11中でかみ合い可能である。 以下に、臨床適用が詳しく記載される。図１に示された中空部材１は好適な圧 縮手段により把握され、その結果、圧力の力、典型的には12ニュートンが上部及 び下部の骨接触面３及び４に適用され、これが中空部材１を圧縮する。この状態 で、移植体が伸展器具を用いずに絶えず可能なように空にされた椎骨間間隙に挿 入され、それにより長さ方向の溝の形状の三次元組織７が移植体の誘導を促進し 、起こり得る滑りに対し保護を与える。 圧縮手段が除去され、かみ合わせリップ10が直立にセットされ、インターロッ ク手段11にかみ合わされ、その結果、中空部材１は最早圧縮可能ではない。移植 体は骨スプリンターまたは骨交換材料ですぐに装填し得る。
───────────────────────────────────────────────────── 【要約の続き】

Claims (1)

  1. 【特許請求の範囲】 １．平らにされた上部骨接触面３、平らにされた下部骨接触面４及び二つの側面 ５を含む外表面２を有する、中空円筒、中空円錐台、中空平頭ピラミッドまたは 中空平頭くさびの形状の平らにされた成形中空部材１からなる椎骨間移植体であ って、 上部及び下部の骨接触面３、４が中空部材１の内部間隙６に向かって弾性圧縮 可能であり、その結果、上部及び下部の骨接触面３、４の最大距離Ｈが0.5 〜5. 0 mmだけ減少可能であることを特徴とする椎骨間移植体。 ２．上部及び下部の骨接触面３、４の最大距離Ｈが１〜３mmだけ減少可能である ことを特徴とする請求項１に記載の移植体。 ３．上部及び下部の骨接触面３、４に12ニュートンの圧力の力の適用の場合、最 大距離Ｈが15％〜30％、好ましくは20％〜25％だけ減少可能であることを特徴と する請求項１または２に記載の移植体。 ４．中空部材１の内部間隙６中で、かみ合わせリップ10が用意され、これが中空 部材１の圧縮性の抑制のもとにインターロック手段11にかみ合わされることを特 徴とする請求項１ないし３のいずれかに記載の移植体。 ５．側面５が細長い孔12を備えていることを特徴とする請求項１ないし４のいず れかに記載の移植体。 ６．上部骨接触面３及び／または下部骨接触面４が好ましくは長さ方向の溝の形 状の三次元組織７を備えていることを特徴とする請求項１ないし５のいずれかに 記載の移植体。 ７．上部骨接触面３及び／または下部骨接触面４が多孔８を備えていることを特 徴とする請求項１ないし６のいずれかに記載の移植体。 ８．上部骨接触面３及び／または下部骨接触面４が１個または数個の中央溝９を 与えることを特徴とする請求項１ないし７のいずれかに記載の移植体。 ９．生体適合性合成材料、好ましくはポリエチレンから製造されることを特徴と する請求項１ないし８のいずれかに記載の移植体。 10．移植体がリン酸三カルシウム(TCP)のヒドロキシルアパタイトで被覆されて いることを特徴とする請求項１ないし９のいずれかに記載の移植体。
JP9516102A 1995-10-20 1995-10-20 圧縮性成形中空部材を有する椎骨間移植体 Pending JPH11513598A (ja)

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WO1997015247A1 (de) 1997-05-01
ATE208171T1 (de) 2001-11-15
KR19990064290A (ko) 1999-07-26
EP0857042B1 (de) 2001-11-07
EP0857042A1 (de) 1998-08-12
US6143031A (en) 2000-11-07
TW360529B (en) 1999-06-11

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