JP3708883B2 - 椎体間隔保持具 - Google Patents

椎体間隔保持具 Download PDF

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Publication number
JP3708883B2
JP3708883B2 JP2002032752A JP2002032752A JP3708883B2 JP 3708883 B2 JP3708883 B2 JP 3708883B2 JP 2002032752 A JP2002032752 A JP 2002032752A JP 2002032752 A JP2002032752 A JP 2002032752A JP 3708883 B2 JP3708883 B2 JP 3708883B2
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holder
rods
spinous processes
vertebral
engaging portions
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Expired - Fee Related
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JP2003230566A (ja
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義夫 猫塚
一弥 織部
洋 高御堂
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昭和医科工業株式会社
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Priority to JP2002032752A priority Critical patent/JP3708883B2/ja
Priority to US10/359,176 priority patent/US7530991B2/en
Priority to DE60307910T priority patent/DE60307910T2/de
Priority to KR1020030007752A priority patent/KR100618101B1/ko
Priority to EP03002588A priority patent/EP1334703B1/en
Publication of JP2003230566A publication Critical patent/JP2003230566A/ja
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • 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
    • A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
    • 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

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Neurology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、隣接した椎体にそれぞれ備えた棘突起の間に配置して棘突起の間隔を一定に保持する椎体間隔保持具に係り、さらに詳細には、椎体のずれを効果的に規制することのできる椎体間隔保持具に関する。
【０００２】
【従来の技術】
隣接した椎体にそれぞれ備えた棘突起の間に配置して棘突起の間隔を一定に保持するための間隔保持具としては、図３に示すごときものが知られている。この間隔保持具１０１は、Ｕ字形状に形成した保持具本体１０３の両端部に、それぞれ外方向へ突出した規制板１０５を備えた構成である。
【０００３】
上記間隔保持具１０１は、図３（Ｂ）に示すように、隣接した椎体１０７にそれぞれ備えた棘突起１０９の間に前記保持具本体１０３を配置し、この保持具本体１０３に備えた前記規制板１０５を前記棘突起１０９の側面に係合する構成である。
【０００４】
【発明が解決しようとする課題】
従来の間隔保持具１０１においては、棘突起１０９の間に単に配置するに過ぎないものであるから、位置固定の安定性に問題がある。
【０００５】
【課題を解決するための手段】
本発明は前述のごとき従来の問題に鑑みてなされたもので、隣接した椎体にそれぞれ備えた棘突起の間に配置されて前記棘突起の間隔を一定に保持する椎体間隔保持具であって、前記各棘突起の両側に配置されかつ複数の椎体に渡って設けられる一対のロッドとの係合部を下面に備えた保持具本を備え、前記各係合部は前記保持具本体の長手方向に離隔してあると共に前記各係合凹部に各ロッドを固定するための各固定ネジを前記各係合部の開口部付近において前記保持具本体に螺着して備え、かつ前記保持具本体の幅方向の両側部に、前記棘突起と当接自在の当接部を備えると共に上記各当接部の外側縁を、前記棘突起に食い込み可能なブレードに形成してあることを特徴とするものである。
【０００８】
【発明の実施の形態】
図２を参照するに、本発明の実施の形態に係る椎体間隔保持具１は、隣接した椎体３にそれぞれ備えた棘突起５の間に配置して使用されるものであって、その固定は、上記棘突起５を間にして配置した一対のロッド７Ａ，７Ｂに固定されるものである。
【０００９】
図２の例においては、前記一対のロッド７Ａ，７Ｂの両端側にそれぞれ椎体間隔保持具１を取付け、この両端側の椎体間隔保持具１をそれぞれ離隔した棘突起５に当接することによって前記ロッド７Ａ，７Ｂを固定した構成を例示してあるが、一対のロッド７Ａ，７Ｂを固定する構成としては、離隔した椎体３にそれぞれスクリュー等の複数のインプラントを螺入固定し、この複数のインプラントに前記ロッド７Ａ，７Ｂの両端部を固定する構成であっても良く、またロッド７Ａ，７Ｂの一端部にフック部を備え、このフック部を椎体に備えた椎弓根に掛けて固定する構成であっても良く、一対のロッド７Ａ，７Ｂを固定する構成は必要によって種々の構成を採用することができるものである。
【００１０】
前記椎体間隔保持具１は、図１に示すように、板状の保持具本体９を備えており、この保持具本体９の幅方向の両側部には、前記棘突起５と当接自在の当接部１１が形成してある。そして、この当接部１１の外側縁１３は、前記棘突起５に対して食い込み可能の鋭利なブレードに形成してある。
【００１１】
前記保持具本体９の下面には、前記一対のロッド７Ａ，７Ｂとの係合部１５，１７が保持具本体９の長手方向に離隔して設けてある。上記係合部１５，１７は同方向に開口して形成してあり、その形状は、一対のロッド７Ａ，７Ｂの径に対応した半円形状に形成してある。そして、上記係合部１５，１７の開口部付近には、固定ネジ１９が螺着してあり、この固定ネジ１９の先端部（下端部）には、前記係合部１５，１７に係合したロッド７Ａ，７Ｂの外周面と当接自在のテーパ面２１を備えたテーパに形成してある。
【００１２】
以上のごとき構成において、隣接した椎体３にそれぞれ備えた棘突起５の間に椎体間隔保持具１における保持具本体９を配置し、かつ上記保持具本体９の両側に備えた当接部１１に前記棘突起５を当接すると共に、前記棘突起５の両側に配置した一対のロッド７Ａ，７Ｂに前記保持具本体９に備えた係合部１５，１７を係合して、固定ネジ１９を締付けることにより、ロッド７Ａ，７Ｂと保持具本体９が一体化される。
【００１３】
上述のごとく一対のロッド７Ａ，７Ｂと保持具本体９とを一体化すると、保持具本体９によってロッド７Ａ，７Ｂの間隔が一定に保持されると共に、ロッド７Ａ，７Ｂの動きが規制されることになる。換言すれば、例えば複数のスクリュー等のインプラントを介してロッド７Ａ，７Ｂの両端部を離隔した椎体３に固定した状態にあるとき、このロッド７Ａ，７Ｂに保持具本体９が固定されることになる。
【００１４】
したがって、離隔した位置の椎体３はロッド７Ａ，７Ｂを介して一定の間隔に保持され、そして前記保持具本体９の両側に位置する棘突起５の間隔は保持具本体９によって規制されるものであり、互に近接する方向への移動が規制されるものである。そして、前記保持具本体９の両側部に備えたブレードが棘突起５に僅かに食い込んだ状態にあるときには、隣接した棘突起５の相対的な移動が拘束され、椎体３の位置ずれが効果的に規制されるものである。
【００１５】
また、固定ネジ１９を締付けてロッド７Ａ，７Ｂを係合部１５，１７に固定したときには、前記固定ネジ１９に備えたテーパ面２１の契作用効果によってロッド７Ａ，７Ｂが係合部１５，１７内へ強固に押圧されると共に、固定ネジ１９の先端部は係合部１５，１７の開口部を狭めることとなり、ロッド７Ａ，７Ｂを係合部１５，１７に確実に固定することができるものである。
【００１６】
さらに、前記構成においては、保持具本体９に備えた係合部１５，１７は同方向に開口してあるから、一対のロッド７Ａ，７Ｂに対して前記係合部１５，１７の係合、離脱を同時的に行うことができ、その係脱を容易に行い得るものである。
【００１７】
【発明の効果】
以上のごとき説明より理解されるように、本発明によれば、棘突起の間に配置した保持具本体は棘突起の両側方に配置した一対のロッドに一体的に固定することができ、また前記保持具本体の幅方向の両側に備えたブレードを棘突起に食い込ませることが可能であるから、棘突起の移動を規制して間隔を安定的に保持することができるものであり、前述したごとき従来の問題を解消し得るものである。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る間隔保持具の説明図である。
【図２】同上の使用状態を示す説明図である。
【図３】従来の間隔保持具の説明図である。
【符号の説明】
１…椎体間隔保持具
３…椎体
５…棘突起
７Ａ，７Ｂ…ロッド
９…保持具本体
１１…当接部
１３…外側縁
１５…係合部
１７…係合部
１９…固定ネジ
２１…テーパ面

Claims (1)

  1. 隣接した椎体（３）にそれぞれ備えた棘突起（５）の間に配置されて前記棘突起（５）の間隔を一定に保持する椎体間隔保持具であって、前記各棘突起（５）の両側に配置されかつ複数の椎体（３）に渡って設けられる一対のロッド（７Ａ，７Ｂ）との係合部（１５，１７）を下面に備えた保持具本体（９）を備え、前記各係合部（１５，１７）は前記保持具本体（９）の長手方向に離隔してあると共に前記各係合凹部（１５，１７）に各ロッド（７Ａ，７Ｂ）を固定するための各固定ネジ（１９）を前記各係合部（１５，１７）の開口部付近において前記保持具本体（９）に螺着して備え、かつ前記保持具本体（９）の幅方向の両側部に、前記棘突起（５）と当接自在の当接部（１１）を備えると共に上記各当接部（１１）の外側縁（１３）を、前記棘突起（５）に食い込み可能なブレードに形成してあることを特徴とする椎体間隔保持具。
JP2002032752A 2002-02-08 2002-02-08 椎体間隔保持具 Expired - Fee Related JP3708883B2 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2002032752A JP3708883B2 (ja) 2002-02-08 2002-02-08 椎体間隔保持具
US10/359,176 US7530991B2 (en) 2002-02-08 2003-02-06 Vertebral body distance retainer
DE60307910T DE60307910T2 (de) 2002-02-08 2003-02-07 Abstandshalter für Wirbelkörper
KR1020030007752A KR100618101B1 (ko) 2002-02-08 2003-02-07 척추 간격 유지기
EP03002588A EP1334703B1 (en) 2002-02-08 2003-02-07 Vertebral body distance retainer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002032752A JP3708883B2 (ja) 2002-02-08 2002-02-08 椎体間隔保持具

Publications (2)

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JP2003230566A JP2003230566A (ja) 2003-08-19
JP3708883B2 true JP3708883B2 (ja) 2005-10-19

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JP2002032752A Expired - Fee Related JP3708883B2 (ja) 2002-02-08 2002-02-08 椎体間隔保持具

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US (1) US7530991B2 (ja)
EP (1) EP1334703B1 (ja)
JP (1) JP3708883B2 (ja)
KR (1) KR100618101B1 (ja)
DE (1) DE60307910T2 (ja)

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KR20030067580A (ko) 2003-08-14
EP1334703A3 (en) 2004-03-31
US20030153915A1 (en) 2003-08-14
EP1334703A2 (en) 2003-08-13
EP1334703B1 (en) 2006-08-30
US7530991B2 (en) 2009-05-12
DE60307910D1 (de) 2006-10-12
JP2003230566A (ja) 2003-08-19

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