JP4929157B2 - 多軸ねじ - Google Patents
多軸ねじ Download PDFInfo
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- JP4929157B2 JP4929157B2 JP2007507525A JP2007507525A JP4929157B2 JP 4929157 B2 JP4929157 B2 JP 4929157B2 JP 2007507525 A JP2007507525 A JP 2007507525A JP 2007507525 A JP2007507525 A JP 2007507525A JP 4929157 B2 JP4929157 B2 JP 4929157B2
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- 230000008878 coupling Effects 0.000 claims description 173
- 238000010168 coupling process Methods 0.000 claims description 173
- 238000005859 coupling reaction Methods 0.000 claims description 173
- 210000000988 bone and bone Anatomy 0.000 claims description 20
- 238000004873 anchoring Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 210000000278 spinal cord Anatomy 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000001356 surgical procedure Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000007943 implant Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 206010028570 Myelopathy Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000029033 Spinal Cord disease Diseases 0.000 description 1
- 206010058907 Spinal deformity Diseases 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000000944 nerve tissue Anatomy 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000000273 spinal nerve root Anatomy 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Images
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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- 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
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
-
- 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
- A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
- A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Description
本発明はロッドおよび可変角頭部を有する骨ねじから成る整形外科固定装置に関する。骨ねじの可変角頭部は結合要素を有し、ねじに対応する頭部の角がある部分をねじ軸に単独で固定して可変角頭部内のロッドの移動を防止する。
脊髄の様々な変形によって痛み、可動範囲の制限、脊柱内にある神経系の損傷などが起こる。これらの変形は、精神的外傷、腫瘍、脊髄の退化、疾病などが原因で起こることがあるが、これに限るものではない。脊髄の一部が固定したものとして治療を受ける場合が多い。一般的な治療方法としては、複数のねじを取り付けおよび/あるいは1個以上の脊椎をつなげ、一般に脊髄の中心に伸びる細長ロッドにねじで接続するかつなげる方法がある。
本発明は、概して、単独で結合部品をねじ頭部に取り付けることができ、また望ましい位置に細長ロッドを固定することができる多軸ねじを使って固定システムを改善するという方向にある。一般的に、本発明は さまざまな脊椎固定システムに利用できる。例えば、1つの実施例では、細長ロッド1個、円形または半球形頭部の骨留め具1個、結合要素1個、留め具頭部と結合要素を受け入れる内部空間があるスカートを利用する。結合要素は1個または複数のコネクタから成る。多数のストップは結合要素か多数のコネクタ上に配置する。そして、留め具方向に伸びた1つ以上のアームがある結合リングと滑らかに接触して構成および順応する。結合リングのアームは、留め具の位置に対応するスカートの位置に固定するために選択的にストップと係合する。本発明の実施例には、キャップがスカートに対して第一位置に回転するとき、スカートの第一端部と係合し凹部内の細長ロッドを捕らえることができるキャップ、チャネル、あるいはスカートの開口部から成る。
本発明は、一般的に、脊椎固定の方向に導いており、よってねじのような留め具と結合要素間の角度を固定するために細長ロッドを固定する必要はない。対応するねじ頭部に結合要素をしっかりと固定するために細長ロッドに十分な圧迫を加える必要がある代わりに、本発明の実施例では、単独ロッドのねじに結合要素を固定するか、ロッドを特定の位置に固定するための力以下でロッドが与える力で結合固定装置を利用するものもある。同様に、本発明の実施例でも結合固定装置とは無関係の方法で結合要素にロッドを固定することができるロッド固定装置を利用するものもある。さらに、本発明の実施例では、細長ロッドを下方に移動することによって結合要素が留め具頭部に対応する位置に結合要素を固定できるものもある。結合要素が固定されたら、結合要素が解除あるいは解放されないでロッドを上方に動かしたり再配置できる。よって、以前の脊椎固定システムとは異なり、本発明の実施例ではロッドか結合要素のどちらか、あるいは結合要素とねじを別々に固定あるいは解除できるものが多い。
Claims (3)
- 細長ロッドと、
固定要素および円形頭部を有す骨留め具と、
該固定要素に近接する該頭部の第一端部に設定され、上部クランプ要素に対応して軸方向に移動可能な下部クランプ要素であって、該下部クランプ要素が該頭部の円形面の一部を受け入れるためのほぼ対応する受け入れ面および外面を含み、少なくとも該外面の一部がねじ切りされている、下部クランプ要素と、
該固定要素より遠位の該頭部の第二端部に設定される上部クランプ要素であって、該下部クランプ要素および上部クランプ要素が対応するクランプの回転を制限するために相互的に接続する突出部および切り欠きを有する、上部クランプ要素と、
該下部および上部クランプ要素のほぼ周りに設定される固定要素であって、固定要素が少なくても一部がねじ切りされた内面を含み、該固定要素の該ねじ切りされた部分が該下部クランプ要素の該ねじ切りされた部分と係合した場合に、下部クランプ要素と上部クランプ要素とが互いの方向に移動して円形頭部を固定する、固定要素と、
該上部クランプ要素および該固定要素と係合し、該細長ロッドを受け入れる受け入れ面を含む、ロッド固定要素とを含む、
結合要素と、
該細長ロッドを該結合要素に固定するために該ロッド固定要素と選択的に係合することが可能な固定キャップとを含む、脊椎固定システム。 - 固定キャップは、前記固定要素に固定されることにより、細長ロッドを固定位置にしっかりと押圧できるようになっている、請求項1記載の脊椎固定システム。
- キャップが、キャップに形成され細長ロッドの直径よりも長い側壁を含む、請求項1記載の脊椎固定システム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/819,994 | 2004-04-08 | ||
US10/819,994 US7503924B2 (en) | 2004-04-08 | 2004-04-08 | Polyaxial screw |
PCT/US2005/011918 WO2005099400A2 (en) | 2004-04-08 | 2005-04-08 | Polyaxial screw |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007532199A JP2007532199A (ja) | 2007-11-15 |
JP4929157B2 true JP4929157B2 (ja) | 2012-05-09 |
Family
ID=35061552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007507525A Active JP4929157B2 (ja) | 2004-04-08 | 2005-04-08 | 多軸ねじ |
Country Status (4)
Country | Link |
---|---|
US (4) | US7503924B2 (ja) |
EP (1) | EP1732457B8 (ja) |
JP (1) | JP4929157B2 (ja) |
WO (1) | WO2005099400A2 (ja) |
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Also Published As
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US8034086B2 (en) | 2011-10-11 |
WO2005099400A3 (en) | 2005-12-08 |
US20140222089A1 (en) | 2014-08-07 |
EP1732457B8 (en) | 2016-06-15 |
US20060004357A1 (en) | 2006-01-05 |
US20050228385A1 (en) | 2005-10-13 |
US9259254B2 (en) | 2016-02-16 |
US8617217B2 (en) | 2013-12-31 |
EP1732457A4 (en) | 2011-01-26 |
WO2005099400A2 (en) | 2005-10-27 |
US7503924B2 (en) | 2009-03-17 |
EP1732457B1 (en) | 2015-09-16 |
EP1732457A2 (en) | 2006-12-20 |
JP2007532199A (ja) | 2007-11-15 |
US20120029569A1 (en) | 2012-02-02 |
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