JP2622901B2 - 固定部材 - Google Patents
固定部材Info
- Publication number
- JP2622901B2 JP2622901B2 JP6509589A JP50958994A JP2622901B2 JP 2622901 B2 JP2622901 B2 JP 2622901B2 JP 6509589 A JP6509589 A JP 6509589A JP 50958994 A JP50958994 A JP 50958994A JP 2622901 B2 JP2622901 B2 JP 2622901B2
- Authority
- JP
- Japan
- Prior art keywords
- fixing member
- base
- screw
- rod
- shaft
- 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.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical 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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
Landscapes
- 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)
Description
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、ヘッドはロッド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。
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。
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
るべきロッドは人の脊柱の矯正インプラントのための構
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。
れる。すなわち、固定部材は、骨に固定されるべきシャ
フトと、ロッドに接続されるためのヘッドとを備える。
ヘッドは、シャフトに接続されたベースと、このベース
から延びロッドを受入れるためのチャネルを形成する2
つの自由脚とを有するU字状断面形状を備える。脚は、
内ねじと外ねじとを含む。固定部材は、さらに、脚の外
側を囲み、外ねじに螺合する内ねじを有し、上端および
下端が開放されているナットと、脚の内ねじに螺合する
ねじを有する止め部材とを備える。
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、真っ直ぐなロ
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。
部に位置する領域に、U字状断面に対して垂直な方向に
見て湾曲した部分を有する。
に向かって下方かつ外方に傾斜するように形成されてい
る。
ルの底部に位置する領域に、脚の内ねじと同心となるよ
うに形成された凹部を有する。
って窪んだ部分を含む。望ましくは、湾曲部分が、中心
から離れた位置で、上方に突出した上反り部分を含む。
好ましくは、上反り部分の位置は、内ねじが形成されて
いる円周部分と、外ねじが形成されている円周部分との
間の中央にほぼ一致する。
て説明したこの説明の実施例から明らかになるであろ
う。
る。
る。
る図である。
示す図である。
図である。
ヘッド3とを有する、脊柱に導入されるべきねじ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を有する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および図4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じ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。
に、ねじ切りされたボルトとして形成される固定部材
(止め部材)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(ナット)12として形成さ
れ、これは外ねじ9と協働するねじ山を有する。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ド10の半径より
も、ロッドをU字形の窪みに容易に挿入しかつそこから
取除くことができるだけのわずかな量だけ大きい。内ね
じ8および外ねじ9はともに、下方向に、すなわちベー
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との間隔が、受入れられるべきロッド10の直径より
も小さくされる。
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。このシャフトも脊柱の部分に接続するた
めに用いられ、フックは推骨の弓に導入される。
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。したがって、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
と形状が確実により良く適合するようにするために役立
つ。
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
して形成されてもよい。
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。ねじの中心軸から離れているビード形の突起21
および22のそれぞれの最頂部の位置は、内ねじ8が形成
されている円周部分と外ねじ9が形成されている円周部
分との間の中央23にほぼ一致する。
ド3は、互いに関して180゜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。
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12は、これらの2つの部分の各々がロッド10、1
5、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。
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11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10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。
Claims (7)
- 【請求項1】骨に固定されるべきシャフト(2、16)
と、ロッド(10、15)に接続されるためのヘッド(3)
とを備え、 前記ヘッドは、前記シャフトに接続されたベース(5)
と、このベースから延び前記ロッドを受入れるためのチ
ャネル(4)を形成する2つの自由脚(6、7)とを有
するU字状断面形状を備え、 前記脚(6、7)は、内ねじ(8)と外ねじ(9)とを
含み、さらに 前記脚(6、7)の外側を囲み、前記外ねじ(9)に螺
合する内ねじを有し、上端および下端が開放されている
ナット(12)と、 前記脚(6、7)の内ねじ(8)に螺合するねじを有す
る止め部材(11)とを備える、固定部材。 - 【請求項2】前記ベース(5)は、U字状チャネル
(4)の底部に位置する領域に、前記U字状断面に対し
て垂直な方向に見て湾曲した部分を有する、請求項1に
記載の固定部材。 - 【請求項3】前記ベース(5)の縁(18、19)は、前記
シャフト(2、16)に向かって下方かつ外方に傾斜する
ように形成されている、請求項1または2に記載の固定
部材。 - 【請求項4】前記ベース(5)は、U字状チャネル
(4)の底部に位置する領域に、前記脚の内ねじ(8)
と同心となるように形成された凹部(17)を有する、請
求項1〜3のいずれかに記載の固定部材。 - 【請求項5】前記湾曲部分が、中心に向かって窪んだ部
分を含む、請求項2に記載の固定部材。 - 【請求項6】前記湾曲部分が、中心から離れた位置で、
上方に突出した上反り部分(21、22)を含む、請求項5
に記載の固定部材。 - 【請求項7】前記上反り部分(21、22)の位置は、前記
内ねじ(8)が形成されている円周部分と、前記外ねじ
(9)が形成されている円周部分との間の中央にほぼ一
致する、請求項6に記載の固定部材。
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 JPH06511415A (ja) | 1994-12-22 |
JP2622901B2 true 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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JP3925942B2 (ja) | 1996-02-16 | 2007-06-06 | スミス アンド ネフュー インコーポレーテッド | 移植片固定具 |
DE19617362C2 (de) * | 1996-04-30 | 1999-06-10 | Harms Juergen | Verankerungselement |
CA2264672C (en) * | 1996-10-24 | 2010-11-30 | Spinal Concepts, Inc. | Method and apparatus for spinal fixation |
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- 1992-10-09 DE DE4245026A patent/DE4245026B4/de not_active Expired - Lifetime
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1993
- 1993-10-08 JP JP6509589A patent/JP2622901B2/ja not_active Expired - Lifetime
- 1993-10-08 WO PCT/EP1993/002756 patent/WO1994008527A1/de active IP Right Grant
- 1993-10-08 EP EP93922921A patent/EP0616512B1/de not_active Expired - Lifetime
- 1993-10-08 ES ES93922921T patent/ES2108881T3/es not_active Expired - Lifetime
- 1993-10-08 CA CA002124840A patent/CA2124840C/en not_active Expired - Lifetime
- 1993-10-08 DE DE59307208T patent/DE59307208D1/de not_active Expired - Lifetime
- 1993-10-08 EP EP97101057A patent/EP0776635A1/de not_active Withdrawn
- 1993-10-08 AT AT93922921T patent/ATE157233T1/de active
- 1993-10-08 KR KR1019940701945A patent/KR0148838B1/ko active
-
1996
- 1996-03-27 US US08/625,405 patent/US5725527A/en not_active Expired - Lifetime
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WO1994008527A1 (de) | 1994-04-28 |
JPH06511415A (ja) | 1994-12-22 |
US5725527A (en) | 1998-03-10 |
ES2108881T3 (es) | 1998-01-01 |
CA2124840C (en) | 1998-08-25 |
DE4245026B4 (de) | 2007-03-08 |
DE59307208D1 (de) | 1997-10-02 |
CA2124840A1 (en) | 1994-04-28 |
ATE157233T1 (de) | 1997-09-15 |
US5545165A (en) | 1996-08-13 |
EP0616512A1 (de) | 1994-09-28 |
EP0616512B1 (de) | 1997-08-27 |
KR0148838B1 (ko) | 1998-10-01 |
EP0776635A1 (de) | 1997-06-04 |
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