JP2002168220A - 骨ねじ - Google Patents

骨ねじ

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Publication number
JP2002168220A
JP2002168220A JP2001343431A JP2001343431A JP2002168220A JP 2002168220 A JP2002168220 A JP 2002168220A JP 2001343431 A JP2001343431 A JP 2001343431A JP 2001343431 A JP2001343431 A JP 2001343431A JP 2002168220 A JP2002168220 A JP 2002168220A
Authority
JP
Japan
Prior art keywords
bore
head
screw
bone screw
diameter
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.)
Granted
Application number
JP2001343431A
Other languages
English (en)
Other versions
JP4384827B2 (ja
Inventor
Juergen Harms
ユルゲン・ハルムス
Lutz Biedermann
ルッツ・ビーダーマン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Biedermann Motech GmbH and Co KG
Original Assignee
Biedermann Motech GmbH and Co KG
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Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26007628&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP2002168220(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Biedermann Motech GmbH and Co KG filed Critical Biedermann Motech GmbH and Co KG
Publication of JP2002168220A publication Critical patent/JP2002168220A/ja
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • A61B17/7038—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other to a different extent in different directions, e.g. within one plane only
    • 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
    • A61B17/7067—Devices bearing against one or more spinous processes and also attached to another part of the spine; Tools therefor
    • 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

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)
  • Materials For Medical Uses (AREA)

Abstract

(57)【要約】 【課題】 より大きな回動角度を可能にする骨ねじを特
定する。 【解決手段】 ねじ切り部（２）と頭部（３）とを有す
るスクリュー部材（１）と、骨ねじに接続されるべきロ
ッドを受け入れるための、頭部端部における受け部
（５）とを有する骨ねじが提供される。受け部（５）
は、第１の開口ボア（６）と、ねじ切りされた２つの自
由脚を有する実質的にＵ字型の断面とを有する。さら
に、受け部は、第１のボア（６）に対向する端部に第２
のボアを有し、その直径は、ねじ切り部（２）の直径よ
りも大きく、頭部（３）の直径よりは小さい。頭部
（３）のための座が、第１のボアの底に設けられる。ス
クリュー部材が少なくとも１つの側に、拡大された角度
で回動できるように、第２のボア（７）の自由端と境を
接する縁は、第１のボア（６）の軸を中心に見ると、非
対称構造である。

Description

【発明の詳細な説明】
【０００１】
【発明の分野】この発明は、ねじ切り部および頭部なら
びに、骨ねじに接続されるべきロッドを受け入れるため
の、頭部端部における受け部を有する骨ねじに関し、受
け部は、第１の開口ボアと、ねじ切りされた２つの自由
脚を有する実質的にＵ字型の断面と、第１のボアに対向
する端部に第２のボアとを有し、その直径は、ねじ切り
部の直径よりも大きく頭部の直径よりは小さく、頭部の
ための座を形成し、受け部はさらに、ねじ山とともに働
くナットまたはスクリューを有する。
【０００２】このような骨ねじは、たとえば、米国特許
第５，６７２，１７６号で開示されている。公知の骨ね
じでは、頭部は球セグメント形状の構造である。第２の
ボアに隣接する第１のボアの底は、同様に球セグメント
形状の構造であり、この球状セクションに球状の頭部が
置かれる。境界縁を通る面が、第１のボアの軸に対して
直角に配向されており、第２のボアの中心点が第１のボ
アの軸と重なる。この手段により、頭部を有するねじ切
り部は、第１のボアの軸を中心に通常２５°までの予め
定められた角度に回動可能であり、ねじ切り部を椎骨部
分にねじ止めにした後でさえも、ロッドを受け入れる受
け部の配向が可能であることが実現される。同時に、回
動角度の大きさは、頭部が受け部で適切に保持されるよ
うに、頭部の直径に応じた第２のボアが一定の大きさを
超えない程度に制限されている。
【０００３】このような骨ねじを使用することは、頚椎
領域では問題がある。この場合、頚椎の寸法が小さいた
め、ねじがいつも１方側にかつ上向きに回動することが
必要であり、より大きな胸椎および腰椎における場合よ
りも、より大きな回動度が必要とされる。この発明の目
的は、より大きな回動角度を可能にする骨ねじを提供す
ることである。
【０００４】この目的は、請求項１で特徴付けられる骨
ねじによって解決される。この発明の詳細は、従属請求
項で示される。
【０００５】この発明のさらなる特徴および実際の利点
は、図を参照することによって、例示される実施例の説
明から明らかになる。
【０００６】
【詳細な説明】骨ねじは、ねじ切り部２と頭部３とを有
する適切なスクリュー部材１を有する。頭部は、ねじ切
り部に隣接する領域において球セグメント形状で形成さ
れる。ねじ切り部２に対向する端部で、頭部は、六角穴
付きねじキーと係合するための、ねじ軸と同軸の窪み４
を有する。
【０００７】骨ねじはさらに、円筒構造の受け部５を含
む。これは、その一端で、軸対称構造の第１のボア６を
有する。対向する一端には、第２のボア７が設けられ、
その直径はねじ切り部２の直径よりも大きく、頭部３の
直径よりは小さい。第２のボアに対向する端部では、第
１のボアが開口し、その直径は、スクリュー部材１がそ
のねじ切り部２によって開口端部を通って導かれ、この
内腔を通り、その頭部が第１のボアの底にまで到達する
ような大きさである。第１のボアの底は、開口端部に向
けて球形状の領域として構成され、その半径は、頭部３
の球セグメント形状のセクションの半径と実質的に同じ
である。さらに、受け部５は、その底が第２のボア７の
方にあり、その２つの側脚１３および１４が、第１のボ
ア６の方にある開口端部へと延びる部分の中心に関して
対称に配置されるＵ字型の窪み８を有する。脚１３およ
び１４の自由端には、ナットまたはスクリューとして構
成されているスクリュー部材と係合するねじ山が設けら
れる。ナットまたはスクリューは、Ｕ字型の窪み８に挿
入されるべきロッドを固定する働きをし、ナットまたは
スクリューは、ロッドに直接または圧力部材を介して働
くことができる。
【０００８】図１および図２で示される実施例では、第
１のボアの対称軸を通る面にあり、かつ予め定められた
角度で対称軸に傾斜される矢印９の方向に、第２のボア
の開口面１１と第１のボアの縁１２との間の縁に円形の
皿穴１０が設けられている。
【０００９】図で見ることができるように、このように
して、スクリュー部材１の軸と第１のボアの対称軸との
間の角度が、他の場合で得ることのできる角度と比較し
て、実質的に拡大される。同時に、スクリュー部材１の
受け部内の座が保持される。
【００１０】図３で示される第２の実施例では、受け部
５の内部は、第１の実施例と同じように構成される。第
２のボア７と境を接する開口面１１は、この実施例で
は、予め定められた角度αで、第２のボア７と境を接す
る面に傾斜され、この面１１に対する垂線(normal)と第
１のボアの対称軸１５とが傾斜角度を囲む。図示される
場合でのこの角度αは、例示される実施例のように１５
°である。このバージョンではまた、スクリュー部材１
は、通常の構造様式で達成可能な角度よりも実質的に大
きい角度で、第１のボアの対称軸の方向に回動可能であ
る。
【００１１】図１で示される実施例および図３で示され
る実施例のどちらの場合においても、小さな周辺セクシ
ョンが残るように、皿穴または面取部が選択され、これ
は球状の座に属する。
【００１２】図示されない第４の実施例では、第２のボ
アの中心点は、第１のボアの対称軸に対して横に少しず
れて、たとえば０．５ｍｍずれて、構成される。この横
方向のずれによって、頭部は球状に構成された底部によ
って形成される取付物で保持されるがより大きな回動幅
が側部方向に実現されるという結果が生じる。
【００１３】前述の例示された実施例では、解決策への
４つの異なるアプローチが示される。個別のアプローチ
を互いに組み合わせることも可能である、つまり、たと
えば、第１の例示された実施例および第２の例示された
実施例の両方、またはそのうちの１つによる解決策を、
第３および／または第４の例示された実施例と組み合わ
せること、または４つのすべての例示された実施例を組
み合わせることができ、この態様で、少なくとも1つの
方向に回動するための可能性を高める。
【００１４】前述の例示された実施例では、各場合にお
いて、第１のボア６の球状の底部は、受け部５の一体構
成部品として構成されている。しかし、変形された実施
例では、球状の底は、第１のボア６を通って導入される
取付部品としてまたは第２のボア７を通って導入される
取付部品として設けることもまた可能である。これによ
り発明では、受け部が挿入部分と共に１つの部材として
見なされ、このようにして組立てられた一体部分におい
ても前述の示された値が用いられる。
【００１５】骨ねじを形成する部材は好ましくはチタン
からなる。図４で示される実施例では、第１のボアの軸
を中心に見た、第２のボアの自由端と境を接する縁は、
対称構造である。スクリュー１はその首部に窪みまたは
傾斜着座部を有し、球体または球セグメントと係合する
ことにより、非対称性が実現され、上述の実施例のよう
に図４に示されるように、拡大された回動角度を実現す
ることができる。
【図面の簡単な説明】
【図１】 第１の実施例の部分的な断面を示す側面図で
ある。
【図２】 図１の拡大詳細図である。
【図３】 第２の実施例の部分的な断面を示す側面図で
ある。
【図４】 さらなる実施例に対応する図である。
【符号の説明】
１ スクリュー部材、２ ねじ切り部、３ 頭部、５
受け部、６ 第１のボア、７ 第２のボア。
フロントページの続き (72)発明者 ルッツ・ビーダーマン ドイツ連邦共和国、78048 ファウ・エス −フィリンゲン、アム・シェーファーシュ タイク、８

Claims (5)

    【特許請求の範囲】
  1. 【請求項１】 ねじ切り部（２）と頭部（３）とを有す
    るスクリュー部材（１）と、骨ねじに接続されるべきロ
    ッドを受け入れるための、頭部端部における受け部
    （５）とを有する骨ねじであって、受け部（５）は、第
    １の開口ボア（６）と、ねじ切りされた２つの自由脚を
    有する実質的にＵ字型の断面と、第１のボア（６）に対
    向する端部に第２のボア（７）とを有し、その直径は、
    ねじ切り部（２）の直径よりも大きく、頭部（３）の直
    径よりは小さく、受け部（５）はさらに、頭部（３）の
    ための座と、ねじ山とともに働くナットまたはスクリュ
    ーとを有し、第１のボア（６）の軸を中心に見ると、第
    ２のボア（７）の自由端と境を接する縁が非対称構造で
    あることを特徴とする、骨ねじ。
  2. 【請求項２】 境界縁は角度領域で皿穴（１０）を有す
    ることを特徴とする、請求項１に記載の骨ねじ。
  3. 【請求項３】 境界縁を通る面に対する垂線が、第１の
    ボア（６）の軸に対して傾斜することを特徴とする、請
    求項１または２に記載の骨ねじ。
  4. 【請求項４】 境界縁によって囲まれる面の中心点が、
    第１のボア（６）の軸に対してずれることを特徴とす
    る、請求項１から３のいずれかに記載の骨ねじ。
  5. 【請求項５】 ねじ切り部（２）と頭部（３）とを有す
    るスクリュー部材（１）と、骨ねじに接続されるべきロ
    ッドを受け入れるための、頭部端部における受け部
    （５）とを有する骨ねじであって、受け部（５）は、第
    １の開口ボア（６）と、ねじ切りされた２つの自由脚を
    有する実質的にＵ字型の断面と、第１のボア（６）に対
    向する端部に第２のボア（７）とを有し、その直径は、
    ねじ切り部（２）の直径よりも大きく、頭部（３）の直
    径よりは小さく、受け部（５）はさらに、頭部（３）の
    ための座と、ねじ山とともに働くナットまたはスクリュ
    ーとを有し、球セグメントに隣接するその首部に、スク
    リュー部材（１）が窪みまたは傾斜着座部を有すること
    を特徴とする、骨ねじ。
JP2001343431A 2000-11-10 2001-11-08 骨ねじ Expired - Lifetime JP4384827B2 (ja)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10055888A DE10055888C1 (de) 2000-11-10 2000-11-10 Knochenschraube
DE10065397:9 2000-12-27
DE10055888:7 2000-12-27
DE10065397 2000-12-27

Publications (2)

Publication Number Publication Date
JP2002168220A true JP2002168220A (ja) 2002-06-14
JP4384827B2 JP4384827B2 (ja) 2009-12-16

Family

ID=26007628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001343431A Expired - Lifetime JP4384827B2 (ja) 2000-11-10 2001-11-08 骨ねじ

Country Status (7)

Country Link
US (10) US6736820B2 (ja)
EP (1) EP1205153B1 (ja)
JP (1) JP4384827B2 (ja)
KR (1) KR100776776B1 (ja)
AT (1) ATE270074T1 (ja)
DE (2) DE10055888C1 (ja)
TW (1) TW546128B (ja)

Cited By (5)

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US20110066189A2 (en) 2011-03-17
US20170164981A1 (en) 2017-06-15
US10058353B2 (en) 2018-08-28
TW546128B (en) 2003-08-11
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US8864803B2 (en) 2014-10-21
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US20040153077A1 (en) 2004-08-05
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US20060084995A1 (en) 2006-04-20
US20190038320A1 (en) 2019-02-07
US20120101532A1 (en) 2012-04-26
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US6736820B2 (en) 2004-05-18

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