JPH0817782B2 - 外傷治療で用いられる脊椎骨の骨接合具用インプラント - Google Patents
外傷治療で用いられる脊椎骨の骨接合具用インプラントInfo
- Publication number
- JPH0817782B2 JPH0817782B2 JP1163602A JP16360289A JPH0817782B2 JP H0817782 B2 JPH0817782 B2 JP H0817782B2 JP 1163602 A JP1163602 A JP 1163602A JP 16360289 A JP16360289 A JP 16360289A JP H0817782 B2 JPH0817782 B2 JP H0817782B2
- Authority
- JP
- Japan
- Prior art keywords
- plug
- rod
- implant
- groove
- outer peripheral
- 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
-
- 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
- A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
Description
ンプラント、特に脊柱接合具用インプラントに関するも
のである。
部分と、ロッドを取りつけるための本体とで構成され、
この本体は2つの分岐部に分かれ且つ後部に向かって開
いた溝が形成されており、この溝は、さらに、上記ロッ
ドが収容できるように本体の両側に向かって開いてい
る。
適当な形のネジまたはブレードで構成することができ
る。
側が開いているか、両側方が開いていた。
に、取付けに必要な部材の数が非常に多くなる。
50)に記載のような、後側が開いた本体の場合には、追
加の取付け要素によって構成された溝内固定具を使用す
る必要があり、この追加の取付け要素を予めロッドに取
り付けておかなければならない。
ッドを差し込むのはかなり難しい。
位置決めしなければならず、ネジを使用する際に医師に
不便を強要する。
の補助具を使用することが必要である。
かり、特に、外す場合には切断加工が必要なため、取外
しが困難である。
提供することにある。
いる2つに分かれた分岐部の内壁に形成された雌ネジに
ネジ込まれるように構成されたプラグを具備し、このプ
ラグがネジ込まれた側で上記の溝が閉じられ、2つの直
径方向反対側のるエッジでロッドと当接している。ロッ
ドの方を向いたプラグの面には、プラグをロッドに対し
て並進運動および回転運動しないように係止・固着する
手段が設けられている。
岐部の中にプラグがネジ込まれるので、インプラントは
非常に小さい寸法となる。
ラグの他の部分と一体に形成された中心尖端を具備して
いる。
突出して周囲に形成された外周リングで構成するか、ま
たは、この外周リングと中心尖端との組合せで構成する
のが好ましい。
以下の説明により理解されるであろう。しかし、本発明
はこれらに実施例に制限されるものではない。
用器具(osteosynthesis device)、特に脊椎骨接合用
器具の構成の一部である。
分(図示した例では湾曲ブレード1で構成されている−
これ自体は公知であるので説明は省略する)と、ロッド
3に取付けるための本体2とで構成されている。このロ
ッド3の表面は平滑であるか、ダイアモンド状の切り込
み(ローレット)を付けた粗面になっている。
方分岐部4で構成され、この分岐部4は、円錐形部分5
を介してブレード1に結合されている。2つの分岐部分
4の間には溝6が形成されており、上記ロッド3はこの
溝6の丸い底部7に収容される。この溝6の丸い底部7
と反対の側は開いている。また、ロッド3を上記分岐部
4の間に収容するために、溝6は分岐部4の両側でも開
いている。
ラグ8には、上記2つの分岐部4の内壁に形成された雌
ネジ11と螺合できるようなネジ9が形成されていて、溝
6のプラグ8側がこのプラグ8によって閉じることがで
きるようになっている。また、このプラグ8には、プラ
グ8が完全に雌ネジ9にネジ込まれたときに、ロッド3
に当接してロッド3中に食い込む(第3図)直径方向両
側の2つのエッジが設けられている。
側を向いた面8aには、プラグ8をロッド3に係止し且つ
固着させて並進運動と回転運動を阻止する手段が設けら
れている。
の部分と一体に形成された中心尖端12と、面8aから突出
した外周リング13とで構成されている。この外周リング
13は、断面が三角形で、好ましくは頂点13aが丸くなっ
ており、プラグ8の他の部分と一体に形成されている。
部には一定の輪郭の穴14が形成されていて、適当な工具
を用いて雌ネジ11にプラグ8をネジ込むことができるよ
うになっている。この穴14は例えば六角形にすることが
できる。インプラントの本体の2つの側面すなわち分岐
部4の雌ネジ11とプラグ8の雄ネジ9は、鋸歯ピッチと
することができる。こうすることによって、プラグ8を
ネジ込んだ場合の荷重の半径方向成分が完全に除去さ
れ、2つの分岐部4が開かないようにすることができ
る。
15(第6図参照)が設けられている。この粗面部分は、
斜線部分15aが、プラグ8の締まる方向に向いた鋸歯状
断面形状を有しているのが有利である。プラグ8は、冷
間加工、例えば冷間鍛造で製作できる。これらの加工方
法で作られたプラグ8は、切削加工で製作されたロッド
3よりも大きい硬度を有している。
の良い同じ材料、例えばフランス規格協会(AFNOR)規
格AS 1 Z2 CND 17.13に相当するアメリカ規格協会(ANS
I)規格316L鋼、で作られている。
る。最初にロッド3を分岐部4の間から溝6中にロッド
3が底部7に当接するまで挿入する。次に、プラグ8を
雌ネジ11に途中までネジ込む。インプラントには収縮
力、圧縮力、ねじれ応力が加わる。次いで、穴14に合っ
た工具でプラグ8を締めてインプラントを固定する。最
後に、プラグ8を中心尖端12と外周リング13がロッド3
に食い込むまで締め込んで最終固定する。このように、
プラグ8の中心尖端12と外周リング13がロッド3に食い
込むのは、プラグ8を構成している材料の硬度が、ロッ
ド3の材料の硬度よりも大きいことによる。この結果、
尖端12および外周リング13によって全体がゆるむのが防
止される。尖端12と外周リング13の直径方向両端部は上
記粗面部分15とともにロッド3中に埋め込まれる。
に対して固定され、尖端12と外周リング13がナット保持
として働いて固定の安全性を確保する。
骨折している脊椎10に上記の骨接合器具を使用した場合
の取付け状態を示している。この骨接合装置は、横断ロ
ッド22と、各ロッド3に取付けられたフック23とを有す
る2個の安定兼横方向牽引用器具20(DTT)を具備して
いる。この場合の骨接合は、第1図から第4図を参照し
て説明したものと類似のインプラント18および19によっ
て完成されている。インプラント19は、骨に固定する部
分が前記の湾曲ブレード1ではなく、ネジ付きロッド21
で構成されているところが異なっている。各インプラン
ト18および19は、ロッド3に沿って、適切に配置されて
いる。
ロッド3をインプラントの本体後部に直接挿入できる。
収縮させる(すなわち、脊椎または骨の一部を伸張させ
る)際に、従来方式の円錐形インプラントでは、正確な
方向付けが必要であったが、本発明では、頭部の方向を
決める必要がない。
が、本発明では後部が開いた1種類の本体に減るので、
骨接合具の組付けが大幅に簡便になり、それと同時に補
助具も簡単になる。
まれ、更にインプラントの本体2が円筒形であるため、
インプラントの寸法が相当小さくなる。
されているので、インプラントの作業中に雌ネジ11を傷
める危険がまったくない。
されているので、プラグと、それと別部品の固定ネジと
を用いたインプラントに比較して、必要部品数が減少
し、必要な作業が減少し、組立も外科医にとって簡単に
なる。
の作業が必要となる)または単純に取り外すことができ
る。取り外しは、特に外傷の治療において必要である。
実際、本発明のインプラントはプラグ8をゆるめること
で非常に簡単に分解できる。
しいが、本発明ではインプラントにロッドを挿入するこ
とが容易である。
13のみを設けることができる。
よるインプラントの1実施例の斜視図であり、 第2図は、第1図のインプラントのロッドの軸方向にお
ける正面図であり、プラグは本体から外してあり、 第3図は、ロッドを組み込んだインプラントの垂直横断
面図であり、 第4図および第5図は、インプラントのプラグの軸断面
図および斜視図であり、 第6図は、プラグのロッドの方向を向く面の平面図であ
り、 第7図は、脊椎骨の一つが骨折している脊椎の身体の正
中面から見た図であり、 第8図は、本発明のインプラントを用いた骨接合具によ
り治療された第7図の骨折部分の正面から見た図であ
り、 第9図は、第8図の骨接合具を身体の正中面から見た図
である。 〔主な参照番号〕 1……ブレード、2……本体、 3……ロッド、4……分岐部、 6……溝、7……底部、 8……プラグ、9……雄ネジ、 10……脊椎、11……雌ネジ、 12……尖端、13……外周リング、 14……穴、 18、19……インプラント、 20……牽引具、22……横断ロッド、 23……フック
Claims (9)
- 【請求項1】骨に固定される部分(1)と、ロッド
(3)に取り付けられる本体(2)とで構成され、この
本体には本体後側に向かって開いた溝(6)が形成され
ており、この溝によって本体は2つの分岐(4)に分け
られ、さらに、ロッド(3)を収容するためにこの溝
(6)は本体の両側で開いているような骨接合具用、特
に脊椎骨接合具用のインプラントにおいて、 本体(2)の後端を構成する上記2つの分岐部(4)の
内壁に形成された雌ネジ(11)にネジ込み可能なプラグ
(8)を具備し、このプラグ(8)はその直径方向反対
側の2つのエッジがロッド(3)と当接するように溝
(6)のネジ込まれた側を閉じ、このプラグ(8)のロ
ッド(3)の方向を向いた面(8a)にはプラグ(8)を
ロッド(3)に係止して固着させる手段が設けられてお
り、この係止・固着手段によってロッドの並進運動と回
転運動とが固定されることを特徴とするインプラント。 - 【請求項2】前記係止・固着手段がプラグ(8)の他の
部分と一体に形成された中心尖端(12)を含むことを特
徴とする請求項1に記載のインプラント。 - 【請求項3】前記係止・固着手段がプラグ(8)の面
(8a)から突出した外周リング(13)を含み、この外周
リング(13)は断面が三角形で、好ましくは頂点(13
a)が丸くなっており、プラグ(8)の他の部分と一体
に形成されていることを特徴とする請求項1に記載のイ
ンプラント。 - 【請求項4】前記係止・固着手段が中心尖端(12)とプ
ラグ(8)の面(8a)から突出した外周リング(13)を
含み、該尖端と外周リングがプラグの他の部分と一体に
形成されていることを特徴とする請求項1に記載のイン
プラント。 - 【請求項5】固定部(1)、本体(2)およびプラグ
(8)が生体適合性の良い同じ材料で作られていること
を特徴とする請求項1〜4のいずれか一項に記載のイン
プラント。 - 【請求項6】プラグ(8)をネジ込んだ場合の荷重の半
径方向成分を除去するために、本体(2)の2つに分か
れた分岐部(4)の雌ネジ(11)とプラグ(8)の雄ネ
ジ(9)とが、鋸歯ピッチであることを特徴とする請求
項1〜5のいずれか一項に記載のインプラント。 - 【請求項7】プラグ(8)がロッド(3)の方を向く面
(8a)に、粗面部分(15)を有することを特徴とする請
求項1〜6のいずれか一項に記載のインプラント。 - 【請求項8】前記粗面部分(15)が、斜辺部分(15a)
が締まる方向に向いた鋸歯状に形成されていることを特
徴とする請求項7に記載のインプラント。 - 【請求項9】プラグ(8)が、冷間加工、例えば冷間鍛
造で、製作され、切削加工で製作されたロッド(3)よ
りもかなり大きい硬度を付与されていることを特徴とす
る請求項1〜8のいずれか一項に記載のインプラント。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8808538A FR2633177B1 (fr) | 1988-06-24 | 1988-06-24 | Implant pour dispositif d'osteosynthese rachidienne, notamment en traumatologie |
FR8808538 | 1988-06-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02198549A JPH02198549A (ja) | 1990-08-07 |
JPH0817782B2 true JPH0817782B2 (ja) | 1996-02-28 |
Family
ID=9367706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1163602A Expired - Lifetime JPH0817782B2 (ja) | 1988-06-24 | 1989-06-26 | 外傷治療で用いられる脊椎骨の骨接合具用インプラント |
Country Status (6)
Country | Link |
---|---|
US (1) | US5005562A (ja) |
EP (1) | EP0348272B1 (ja) |
JP (1) | JPH0817782B2 (ja) |
DE (2) | DE8915443U1 (ja) |
ES (1) | ES2025850T3 (ja) |
FR (1) | FR2633177B1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003533242A (ja) * | 2000-01-19 | 2003-11-11 | サージカル ダイナミックス インコーポレイテッド | 脊椎ロッド固定器具 |
Families Citing this family (444)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2642645B1 (fr) * | 1989-02-03 | 1992-08-14 | Breard Francis | Stabilisateur intervertebral souple ainsi que procede et appareillage pour le controle de sa tension avant mise en place sur le rachis |
USRE36221E (en) * | 1989-02-03 | 1999-06-01 | Breard; Francis Henri | Flexible inter-vertebral stabilizer as well as process and apparatus for determining or verifying its tension before installation on the spinal column |
FR2642643B1 (fr) * | 1989-02-09 | 1991-05-10 | Vignaud Jean Louis | Instrumentation rachidienne pour fixation pediculaire universelle par vis diapason a reglage micrometrique |
DE3916198A1 (de) * | 1989-05-18 | 1990-11-22 | Hug Gerhard Gmbh | Verankerungselement |
DE3923996A1 (de) * | 1989-07-20 | 1991-01-31 | Lutz Biedermann | Aufnahmeteil zum gelenkigen verbinden mit einer schraube zum bilden einer pedikelschraube |
US5261913A (en) * | 1989-07-26 | 1993-11-16 | J.B.S. Limited Company | Device for straightening, securing, compressing and elongating the spinal column |
US5344422A (en) * | 1989-10-30 | 1994-09-06 | Synthes (U.S.A.) | Pedicular screw clamp |
CA2035348C (fr) * | 1990-02-08 | 2000-05-16 | Jean-Louis Vignaud | Dispositif de fixation orientable de tiges d'osteosynthese rachidienne |
FR2657774B1 (fr) * | 1990-02-08 | 1992-05-22 | Sofamor | Sabot de prise sacree pour dispositif d'osteosynthese rachidienne. |
FR2658414B1 (fr) * | 1990-02-19 | 1992-07-31 | Sofamor | Implant pour dispositif d'osteosynthese en particulier du rachis. |
FR2658413B1 (fr) * | 1990-02-19 | 1997-01-03 | Sofamor | Dispositif d'osteosynthese pour la correction des deviations rachidiennes. |
FR2659225B1 (fr) * | 1990-03-08 | 1995-09-08 | Sofamor | Dispositif de fixation transverse pour assurer une liaison transversale rigide entre deux tiges d'un systeme d'osteosynthese rachidienne. |
WO1991016020A1 (en) * | 1990-04-26 | 1991-10-31 | Danninger Medical Technology, Inc. | Transpedicular screw system and method of use |
US5102412A (en) * | 1990-06-19 | 1992-04-07 | Chaim Rogozinski | System for instrumentation of the spine in the treatment of spinal deformities |
GB9014817D0 (en) * | 1990-07-04 | 1990-08-22 | Mehdian Seyed M H | Improvements in or relating to apparatus for use in the treatment of spinal disorders |
US5020519A (en) * | 1990-12-07 | 1991-06-04 | Zimmer, Inc. | Sagittal approximator |
DE4110002C1 (en) * | 1991-03-27 | 1992-05-21 | Heinrich 7900 Ulm De Ulrich | Vertebral column correcting and stabilising implant - has screw head retainer wall with two parallel, protruding edges pointing against threaded rod |
FR2676354B1 (fr) * | 1991-05-17 | 1997-11-07 | Vignaud Jean Louis | Dispositif de liaison verrouillable d'elements d'ancrage d'osteosynthese rachidienne. |
US5261911A (en) * | 1991-06-18 | 1993-11-16 | Allen Carl | Anterolateral spinal fixation system |
US5222954A (en) * | 1991-06-21 | 1993-06-29 | Artifex, Ltd. | Spinal implant system and method for installing the implant |
FR2680461B1 (fr) * | 1991-08-19 | 1993-11-26 | Fabrication Mat Orthopedique | Implant pour dispositif d'osteosynthese notamment du rachis et dispositif correspondant pour sa mise en place. |
US5257993A (en) * | 1991-10-04 | 1993-11-02 | Acromed Corporation | Top-entry rod retainer |
FR2681776A1 (fr) * | 1991-09-30 | 1993-04-02 | Fixano Sa | Dispositif d'osteosynthese vertebrale. |
US5282862A (en) * | 1991-12-03 | 1994-02-01 | Artifex Ltd. | Spinal implant system and a method for installing the implant onto a vertebral column |
US5254118A (en) * | 1991-12-04 | 1993-10-19 | Srdjian Mirkovic | Three dimensional spine fixation system |
NL9200288A (nl) * | 1992-02-17 | 1993-09-16 | Acromed Bv | Inrichting ter fixatie van ten minste een gedeelte van de cervicale en/of thoracale wervelkolom van de mens. |
DE9202745U1 (ja) | 1992-03-02 | 1992-04-30 | Howmedica Gmbh, 2314 Schoenkirchen, De | |
AU659912B2 (en) * | 1992-03-10 | 1995-06-01 | Bristol-Myers Squibb Company | Perpendicular rod connector for spinal fixation device |
EP0572790B1 (de) * | 1992-06-04 | 1996-02-14 | Synthes AG, Chur | Osteosynthetisches Befestigungselement |
WO1993025161A2 (en) * | 1992-06-08 | 1993-12-23 | Campbell Robert M Jr | Segmental rib carriage instrumentation and associated methods |
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-
1988
- 1988-06-24 FR FR8808538A patent/FR2633177B1/fr not_active Expired - Lifetime
-
1989
- 1989-06-13 DE DE8915443U patent/DE8915443U1/de not_active Expired - Lifetime
- 1989-06-13 EP EP89401648A patent/EP0348272B1/fr not_active Expired - Lifetime
- 1989-06-13 ES ES198989401648T patent/ES2025850T3/es not_active Expired - Lifetime
- 1989-06-13 DE DE8989401648T patent/DE68900228D1/de not_active Expired - Lifetime
- 1989-06-21 US US07/369,701 patent/US5005562A/en not_active Expired - Lifetime
- 1989-06-26 JP JP1163602A patent/JPH0817782B2/ja not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003533242A (ja) * | 2000-01-19 | 2003-11-11 | サージカル ダイナミックス インコーポレイテッド | 脊椎ロッド固定器具 |
Also Published As
Publication number | Publication date |
---|---|
US5005562A (en) | 1991-04-09 |
DE8915443U1 (ja) | 1990-06-13 |
DE68900228D1 (de) | 1991-10-02 |
FR2633177A1 (fr) | 1989-12-29 |
EP0348272B1 (fr) | 1991-08-28 |
EP0348272A1 (fr) | 1989-12-27 |
JPH02198549A (ja) | 1990-08-07 |
FR2633177B1 (fr) | 1991-03-08 |
ES2025850T3 (es) | 1992-04-01 |
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