JPH06511415A - 固定部材 - Google Patents

固定部材

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Publication number
JPH06511415A
JPH06511415A JP6509589A JP50958994A JPH06511415A JP H06511415 A JPH06511415 A JP H06511415A JP 6509589 A JP6509589 A JP 6509589A JP 50958994 A JP50958994 A JP 50958994A JP H06511415 A JPH06511415 A JP H06511415A
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Prior art keywords
fixing member
base
rod
curved
shaft
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JP6509589A
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JP2622901B2 (ja
Inventor
ハルムス,ユルゲン
シュフレバーガー,ハリー・エル
ビーダーマン,ルッツ
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ビーダーマン・モテーク・ゲゼルシャフト・ミット・ベシュレンクタ・ハフツング
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Priority claimed from DE4234118A external-priority patent/DE4234118C2/de
Application filed by ビーダーマン・モテーク・ゲゼルシャフト・ミット・ベシュレンクタ・ハフツング filed Critical ビーダーマン・モテーク・ゲゼルシャフト・ミット・ベシュレンクタ・ハフツング
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002Longitudinal elements, e.g. rods
    • A61B17/7011Longitudinal element being non-straight, e.g. curved, angled or branched
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Dowels (AREA)
  • Bipolar Transistors (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。

Description

【発明の詳細な説明】 固定部材 この発明は、骨に固定されるべきシャフトと、ロッドに接続するためのヘッドと を備える固定部材に関し、ヘッドの断面は実質的にU字形であり、そのベースは シャフトに接続され、ヘッドはロットを受入れるためのチャネルを規定する2つ の自由脚を含み、これらの自由脚は内ねじと外ねじとを備え、この固定部材はさ らに、自由脚の外側を囲み、かつ外ねじと協働する内ねじを有する部材と、この 自由脚の内ねじと協働するねじ山を有する固定部材とを備える。
そのような固定部材は、文献EP−A−0,487,830から既知である。ロ ッドの断面は三角形であり、これはねじり運動からの抑制手段としての役割を果 たす。意図した形状矯正に対応して湾曲されたプレートにより、長手方向の安定 化手段が設けられる。本質的に、このプレートは比較的スペースをとる。さらに 、2つの脚の間のベースはスリットの長手方向に平坦に形成される。実際的な応 用においては、ロッドに作用する力によって、交番応力がかなり繰返される。し たがって、ロッドは、いくらか時間がたつとスリットのベースの端部の所で折れ やすい。
この発明の目的は、そのサイズを縮小しかつより大きい継続的な応力に耐えられ るように固定部材を形成することである。そのような固定部材およびそれに接続 されるへきロッドは人のを柱の矯正インブラントのための構成部品として用いら れるため、このことは特に重要であり、したがって寸法を小さくすることおよび 負荷の下で非常に大きな安定性が得られることが望ましい。
この目的は、U字形の窪みのベースがU字形の断面に対して垂直な方向に湾曲部 分を存することにおいて達成される。したがって、曲がったロッドでも固定部材 内に完全に固定できるため、形状矯正に対応して曲げられた丸いロッドを、形状 矯正手段のためのプレート部材の代わりに用いることができる。さらに、継続的 な負荷の下での安定性は、まっすぐなロッドに対してだけではなく、特に湾曲し たロッドに対してもかなり大きくなる。
この発明のさらなる特徴および利点は、図面を参照して説明したこの発明の実施 例から明らかになるであろう。
図において、 図1は、固定部材の第1の実施例の側面図である。
図2は、図1に示す装置の正面図である。
図3は、図1の線III−IIIに沿った断面図である。
図4は、図2の線IV−IVに沿った断面図である。
図5は、第2の実施例の側面図である。
図6は、変形実施例の対称面に沿った拡大断面図である。
図8は、まっすぐなロッドを装着した、図7に対応する図である。
図9は、凸状に湾曲したロッドを備える同じ実施例を示す図である。
図1Oは、凹状に湾曲したロッドを備える同じ実施例の図である。
図1に示す固定部材は、ねじ切りされたシャフト2とヘット3とを有する、を柱 に導入されるへきねじ1を含む。
ヘッド3は、ねじ切りされたシャフト2の中心軸に関して対称であり、かつねじ 切りされたシャフト2の方向に向けられたベース5を存するU字形の窪み4を備 える。U字形の窪み4を規定するヘッドの側壁は、自由脚6.7によって形成さ れる。図3、図4および図5において最良に示されるように、ねじ切りされたシ ャフト2の中心軸と同軸でありかつ内ねし8を有するボアは、チャネルの内側に 設けられる。ヘッド3自体は円筒形であり、図4において最良に示されるように 、自由脚6.7の領域に外ねじ9を備える。
ロッドをこのねじを用いて固定できるようにするために、ねじ切りされたボルト として形成される固定部材11が設けられる。固定部材11は、内ねじ8と協働 し、U字形の窪み4にねじ込むための外ねじを備える。この固定部材は、ベース 5と反対側の面に、ねじ回しと係合するためのスリットまたは他のいずれかの適 切な窪みを有する。さらに、U字形の脚6.7の外側を囲む囲み部材が、スピゴ ット12として形成され、これは外ねじ9と協働するねし山を存する。内ねじ8 とそれに関連する固定部材11との回転方向は、外ねじ9とスピゴット12との 回転方向と反対である。図3において最良に示されるように、U字形の窪みのベ ース5の半径は、その中に受入れられるべきロット10の半径よりも、ロットを U字形の窪みに容易に挿入しかつそこから取除くことかできるだけのわずかな量 だけ大きい。
内ねじ8および外ねし9はともに、下方向に、すなわちへ−ス5の方向に延在し 、その対称軸に関する突起と、ベース5との間隔か、受入れられるべきロッド1 0の直径よりも小さくされる。
図5に示す実施例では、ヘッドは、ねじ切りされたシャフトにではなく、フック 16として形成されるシャフトに接続される。このシャフトもを柱の部分に接続 するために用いられ、フックは椎骨の弓に導入される。
図6に示す実施例では、U字形の窪みのベースは、内ねじ8の中心軸と同軸のさ ら穴17を備える。ベースの2つのリム18.19は上反りにされ、シャフトに 向かって外側に傾斜している。したかって、湾曲したロッドを受入れると、U字 形の窪み4のベース上に点状の支持だけではなく、より大きい支持領域が形成さ れる。シャフトに向かったキャンバは、シャフトの方向に湾曲したロッドと形状 か確実により良く適合するようにするために役立つ。
図7ないし図10において、別の実施例のヘッドが、それに接続されるべきロッ ドと接続された状態で示されている。ヘッドに接続されるシャフトは、ねじ切り されたシャフト2として形成されてもよく、またはフック16とじて形成されて もよい。
これらの図に示すように、それぞれのU字形の窪みのベースは湾曲している。こ の湾曲した部分は、内部の凹部20と、ねじの中心軸に関してそれと対称であり 、かつ上方向に突き出た上反りにされた2つの領域21.22とを備える。ビー ド形の突起21および22のそれぞれの最頂部とねじの中心軸との間の距離は、 内ねじ8の半径と外ねじ9の半径との間の差の中心23と、ねじの中心軸との間 の距離に実質的に等しい。
図1、図3および図5に最良に示されるように、ヘッド3は、互いに関して18 0°でオフセットされ、かつU字形の窪みに関して実質的に90°でオフセット され、かつプライヤ等の工具と係合するための2つの窪み13.14を備える。
使用時、ねじlをまずを柱にねじ込む。その際にロッド10または15.15′ をU字形の窪み4に配置し、固定部材11をねじ山8にねじ込むことによって固 定する。その後、スピゴット12を嵌め込む。今、固定部材およびスピゴット1 2は、これらの2つの部分の各々がロッド10.15.15′に所望の保持力を 与える程度に、ベース5に向かって別々に回される。したがって、固定部材11 によるロッドの固定およびスピゴット12によるロッドの固定は、別々に調整可 能であるという利点が得られる。さらに、クランプすることによってねじの最終 的な固定およびロッキングが得られる。
U字形の窪みのベースの湾曲した形状、特に図7ないし図10に示すような間隔 のあけられた突き出た上反りにされた支持領域を上述の位置に有する形状のため 、まっすぐなロッド10として形成されていても、凸状または凹状に湾曲したロ ッド15.15’として形成されていても、固定されるべき各々のロッドは2つ の平坦領域21.22の上に置かれることになる。図7において最良に示される ように、固定部材11およびスピゴット12のロッドに面する下方の端部24. 25はさらに丸くされているか、または凸状に湾曲されている。したがって、固 定されるべきロッドに接触するすべての係合点は、鋭い縁部を用いずにロッドに 作用する。さらに、上述の配置により、ベースの2つの突起領域21.22の係 合領域を固定部材Itの係合点とスピゴット12の係合点とのちょうど間に配置 できる。
この態様で、特に優れた固定および特に低い応力を達成できる。図8ないし図1 Oにおいて最良に示されるように、どのように湾曲したロッド10,15.15 ′に関しても優れた固定が得られる。上述の実施例では、ヘッド3は、ねじ切り されたシャフトまたはフック形のシャフトにそれぞれしっかりと接続される。変 形実施例に従えば、それぞれのシャフトおよびヘッドはヒンジを介して接続され る。
特表平6−511415 (4) ど − AI’Jl−(ANG ANNF’X ANNEXEフロントページの続き (72)発明者 ビーダーマン、ルッッドイツ連邦共和国、78048 ファウ ・ニス・フィリンゲン、シェーファーシュタイク、8

Claims (6)

    【特許請求の範囲】
  1. 1.骨に固定されるべきシャフト(2、16)と、ロッド(10、15)に接続 するためのヘッド(3)とを備え、ヘッドの断面は実質的にU字形であり、その ベース(5)はシャフト(2、16)に接続され、このヘッドはロッド(10、 15)を受入れるためのチャネルを規定する2つの自由脚(6、7)を含み、 脚(6、7)は内ねじ(8)および外ねじ(9)を含み、さらに、 脚(6、7)の外側を囲み、かつ外ねじと協働する内ねじを有する部材(12) と、脚の内ねじ(8)と協働するねじ山を有する固定部材(11)とを備える固 定部材であって、 U字形の窪み(4)のベース(5)が、U字形の断面に対して垂直な方向に、湾 曲した部分を有することを特徴とする、固定部材。
  2. 2.ベース(5)のリム(18、19)が、シャフト(2、16)に向かって下 方向に外側に傾斜するように形成されることを特徴とする、請求項1に記載の固 定部材。
  3. 3.窪み(17)が、第1の内ねじ(8)と同軸のチャネルのベース(5)に設 けられることを特徴とする、請求項1または請求項2に記載の固定部材。
  4. 4.湾曲部分が、中心に向かって窪んだ部分を含むことを特徴とする、請求項1 ないし請求項3のいずれかに記載の固定部材。
  5. 5.湾曲部分が、中心から間隔のあけられたそれぞれ突き出た上反り部分(21 、22)を含むことを特徴とする、請求項4に記載の固定部材。
  6. 6.上反り部分(21、22)の間隔が、内ねじ(8)の半径と外ねじ(11) の半径との間の差の中心(23)の間隔と実質的に一致することを特徴とする、 請求項4に記載の固定部材。
JP6509589A 1992-10-09 1993-10-08 固定部材 Expired - Lifetime JP2622901B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4234118.3 1992-10-09
DE4234118A DE4234118C2 (de) 1992-10-09 1992-10-09 Verankerungselement
PCT/EP1993/002756 WO1994008527A1 (de) 1992-10-09 1993-10-08 Verankerungselement

Publications (2)

Publication Number Publication Date
JPH06511415A true JPH06511415A (ja) 1994-12-22
JP2622901B2 JP2622901B2 (ja) 1997-06-25

Family

ID=6470108

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6509589A Expired - Lifetime JP2622901B2 (ja) 1992-10-09 1993-10-08 固定部材

Country Status (9)

Country Link
US (2) US5545165A (ja)
EP (2) EP0616512B1 (ja)
JP (1) JP2622901B2 (ja)
KR (1) KR0148838B1 (ja)
AT (1) ATE157233T1 (ja)
CA (1) CA2124840C (ja)
DE (2) DE4245026B4 (ja)
ES (1) ES2108881T3 (ja)
WO (1) WO1994008527A1 (ja)

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KR0148838B1 (ko) 1998-10-01
EP0776635A1 (de) 1997-06-04
ATE157233T1 (de) 1997-09-15
JP2622901B2 (ja) 1997-06-25
US5545165A (en) 1996-08-13
WO1994008527A1 (de) 1994-04-28
CA2124840C (en) 1998-08-25
ES2108881T3 (es) 1998-01-01
EP0616512B1 (de) 1997-08-27
DE59307208D1 (de) 1997-10-02
CA2124840A1 (en) 1994-04-28
DE4245026B4 (de) 2007-03-08
EP0616512A1 (de) 1994-09-28

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