JPS62277954A - 茎ねじ - Google Patents

茎ねじ

Info

Publication number
JPS62277954A
JPS62277954A JP62101107A JP10110787A JPS62277954A JP S62277954 A JPS62277954 A JP S62277954A JP 62101107 A JP62101107 A JP 62101107A JP 10110787 A JP10110787 A JP 10110787A JP S62277954 A JPS62277954 A JP S62277954A
Authority
JP
Japan
Prior art keywords
pedicle screw
head
threaded shank
receiving
threaded
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
JP62101107A
Other languages
English (en)
Other versions
JPH058011B2 (ja
Inventor
ユルゲン・ハルムス
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of JPS62277954A publication Critical patent/JPS62277954A/ja
Publication of JPH058011B2 publication Critical patent/JPH058011B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • A61B17/7001—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
    • A61B17/7002—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
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7008—Longitudinal elements, e.g. rods with a cross-section which varies along its length with parts of, or attached to, the longitudinal elements, bearing against an outside of the screw or hook heads, e.g. nuts on threaded 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
    • A61B17/7001—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
    • A61B17/7038—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

Landscapes

  • 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)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 ３、発明の詳細な説明 ［発明の背景〕 この発明はねじを切られた軸部分とねじを切られた軸部
分のヘッド側に設けられかつバーを受取るように適合さ
れている受部を有する茎（ｐｅｄｉａｌｅ）ねじに関す
るものである。
そのようなねじはを柱の単一セグメントまたは複数セグ
メントを固定するために用いられる。この種の茎ねじは
ドイツ特許明細書第２６４９０４２号から公知である。
ねじはねじを切られた部分とヘッドの端部でそれにしっ
かりと接続される受部を含む。いくつかの組のそのよう
なねじは互いにそれぞれの距離をもってを柱の両側の背
骨にねじ込まれる。それぞれの受部は受はスリットを含
む。それぞれのねじを切られたバーはねじの右と左のグ
ループのこれらの受はスリットを通過する。その後バー
は締付ねじによってそれぞれの受部に固定される。この
解決の欠点は垂直な柱の受部の受はスリットの軸がねじ
を切られたロンドがねじを歪まずことなしに受はスリッ
トを通過するように整列されるといった正にその態様で
これらのねじを背骨にしっかりとねじ込みかつ同時に２
つの面にねじを位置決めすることは困難であるというこ
とである。これを試しに行なっても非常に多くの時間が
必要であり、これはを柱での手術には非常に不利である
。さらにそのような正確な心合わせはなかなか達成でき
ない。その結果関連したぜん断力がｈじを切られたロッ
ドに作用し、これは手術後の使用に際してのロッドの起
こり得る破壊または固定の不足さといったものを引き起
こす。
［発明の目的］ この発明の目的は、上述の欠点を避ける改良された茎ね
じを提供することである。さらに沖Ｉの目的は、取付動
作を′８易にし、かつ同時に後の使用にお（プる危険を
減じるかまたは避ける上述の茎ねじを捉（バすることで
ある。
［発明の要約］ この発明に従えば、を髄のセグメントを安定させるため
の茎ねじはねじを切られた軸部とヘッドの側に設けられ
かつバーを受取るように適合された受部とを含み、ねじ
を切られた軸部と受部は互いに関節でつながれる態様で
接続されている。
まず初めにそれはねじが受部の位置に関係なくねじ込ま
れ、その後で受部が簡単にねじを切られたバーを受取る
ために必要とされる位置にもたらされる態様で達成され
る。これは結果として手術時間およびねじを切られたバ
ーに作用する力を本質的に減じる。
第１図ないし第３図で示される第１の実施例において茅
ねじ１はねじを切られた軸部２および受部３を含む。
ねじを切られた軸部は背骨にねじ込まれるように適合さ
れた従来通りに設計されたねじを切られた部分４を含む
。六角ヘッド５はねじを切られた部分のｔ＼ラッド部で
設けられる。外部のねじ７を有する突起６は杓じを切ら
れた部分と反対の側に続く。突起６はねじを切られた部
分と反対の側で設けられる球面セグメントの形の凹所８
を有する。
ねじを切られた部分４、六角ヘッド５、突起６および凹
所８は第１図に示される態様で互いに同軸に心合わせさ
れる。
ロックナツト９はねじを切られた軸部に関連して設けら
れる。ロックナツトは内部のねじ１０を有しねじを切ら
れた軸部２に向かう側に設けられている凹所１１を含む
。内部のねじの寸法は内部のねじが外部のねじ７と嵌合
するように選択される。球状セグメントとして型取られ
た部分１２は凹所１１の底に続く。球状セグメントの半
径は凹所８の半径に実質的に対応する。凹所に型取られ
た球状セグメントの開放側部は凹所８と反対にある。穴
１３は突起６の反対側で凹所１２に続く。
内部のねじ１ｏを有する凹所１１と、球状のじグメン１
−の型の凹所１２と、穴１３は互いに同軸に心合わせさ
れる。
接続部材１４が提供され、これは球状セグメントの型か
または球状部分１５と球状部分に続きかつそれと１つの
単体部分を形成する円筒形部分１６を含む。ロッキング
ビン１８を受取るように適合された穴１７は円筒部分の
軸に垂直方向に円筒部分に設けられる。部分１５の半径
は２つの凹所８および１２の半径と非常に近くわずかに
それより小さいだけである。円筒形部分１６の直径は穴
１３の直径より小さく、そのため前方側部で円筒形部分
を有する接続部材は凹所１１および穴１３を突扱は穴１
３から外側に突出するかもしれない。
ねじ７と１０は、凹所８および１２と球状セグメントの
型の部分１５の直径の関数で選択され、そのため接続部
材が装設されかつロックナツト９がねじ込まれるとき、
球状セグメントの型の部分１５の中心のまわりの円錐内
で円筒形部分が一方向に動くことを可能にする。動きの
程１’２は穴１３の大きざおよび円筒形部分１６の外部
直径との差によって予め定められる。
ロックナツト９は実質的に堅い接続が結果として接続部
材１４とねじを切られた部分４の間に生じるように締付
けられてもよい。
受部３はその対称軸がねじを切られた軸部２の対称軸と
心合わせをされ、円筒形の態様で設計される。同軸に延
在している内部穴１９はねじを切られた軸部と向かい合
う面に設けられる。内部穴１つの直径は円筒形部分１６
がらようどそこに嵌合されるように選択される。交差穴
２０は内部穴１つの方向に垂直に設けられかつロッキン
グビンがきらんとそこに嵌合するように選択された寸法
を有する。内部穴１つの深さと穴２０の位置はそこにし
っかりと￥Ｒ設されたロックナツトを何する円筒形部分
１６が第２図で示されるＣ、様で内部穴１９に挿入され
かつロッキングビン１８によってロックされるように選
択される。受部は穴１９の反対の端部にＭＱ＋ノられる
受はスリット２１を有する。受はスリット２１は受部の
対称軸に垂直に延在しかつその両方の外側に凹所２２お
よび２３が設けられる。受はスリット２１の幅は（こに
嵌合されるべきねじを切られたロッドがゆったりとそこ
を通過するように選択される。シリコンのような緩衝特
性を有する材料からなる暖街ワツシセ２４はロツクノッ
１〜つと２部３の間に設けられる。
一実施例に従えば凹所８および１２および／または球状
セグメントの型の部分１５の表面はテフロンのような摩
擦防止手段で磨かれるかまたはコーチｒングされ、その
ため円筒形部材のわずかな緩衝された動きもロックナツ
ト９が締付けられている場合でも可能である。ざらに別
の実施例に従えば、表面は平らでないのでボールは締付
けられたロックナツトって装着された位置で実際に動か
なくなりかつ接続部材１４とねじを切られた部分４の間
の実質的に堅い接続が４ｑられる。
ロックナツト９は茎ねじをそれぞれの背骨に挿入するた
めにそれぞれ取除かれたりまた緩められたりする。挿入
後受部３の方向はねじを切られたロンドがぜん断力のい
かなる作用もなしに心合わせされ１ｑるように心合わせ
される。それと同時にねじを切られたロンドはそれぞれ
の凹所２２および２３に位置決めされた締付ねじて固定
される。
その後所望されるようにそれぞれのロックナツト９は接
続部材１４がほとんどまたは全然それ以上動かないよう
に締付けられ、こうして受部３とねじを切られた軸部２
の間の実質的に堅い接続が（りられるか、またはそれは
それが２つの部分の間の所望された！！された動きを可
能にする程度にだけ締付レプられる。
第４図ないし第１１図に示される実施例において横方向
の茎ねじ２５はねじを切られた軸部２６と受取部２７を
念む。
ねじを切られた軸部２６は背骨にねじ込まれるように適
合されたねじを切られた部分２８を含む。
球状セグメントの型のヘッド２つはねじを切られた部分
のヘッド端部に設けられる。ヘッド２つはねじを切られ
た部分２８の軸に垂直に延在しかつねじを切られた部分
と反対のヘッドの側に設けられている平坦な表面３ｏ＠
−有する。表面３０は球状の部分を切取ることによって
形成される。切取られた部分は球状本体の半径の約半分
に対応する。
六角穴３１は第６図かられかるようにねじを切られた部
分２８と同軸に設けられる。六角穴３１はねじを切られ
た軸部２６を背骨にねじ込むために六角ソケットねじキ
ーによって係合されてもよい。もちろん六角穴以外の他
の型がねじドライバによって係合するために設けられて
もよい。
受部２７は双ヘッドハーフ３２および３３とまたヘッド
ハーフを一緒に保持する保持リング３４を含む。
各ヘッドハーフは他方のヘッドハーフに向かい合うその
内部の側面に球状セグメントの型の部分３５を有する。
ボールの内部半径はヘッド２９の半径に対応する。切頭
円錐のセグメントの形状を有し球状セグメントの型の部
分から外方向に逸れるように設計されるカラ一部分３６
が球状セグメントの型の部分に続く。カラ一部分の軸は
球状セグメントの型の部分３５の中心を通過する。受は
スリット３７はカラ一部分の反対にある球状セグメント
の型の部分３５の側にカラ一部分と球状セグメントの型
の部分の対称軸に垂直に延在する。
受はスリット３７は他方のヘッドハーフの反対にあるそ
の外側に設けられる凹所３８を有する。受はスリットの
幅はそこに嵌合されるねじを切られたロッド３９が第４
図に示されるようにゆったりとそこを通過するように選
択される。
ヘッドハーフはカラ一部分３６の領域に設けられかつカ
ラ一部分および球状セグメントの型の部分の対称軸に垂
直に延在している溝の型の凹所４０を有する。
２つのヘッドハーフ３２および３３は同一の態様で形成
される。それらの寸法は球状セグメントの型の部分３５
の中心４１がそれぞれの第２のヘッドハーフに反対のそ
れぞれの分難している平面４２の１ミリメートルの何分
の１かだけ外にあり、そのためギャップ４３が２つのヘ
ッドハーフ３２および３３が互いにヘッドのまわりに平
行に組立てられるとき両方のハーフの間で得られるよう
に選択される。
保持リング３４はカラ一部分３６の外部表面の角のまた
は逆モールドを実際に示す内部表面４４を０する。特に
内部表面４４は突出している切り広げ４５を含み、これ
は溝型の凹所／ＩＯとそれぞれの隣接した横の端縁部分
４６および４７と嵌合する。特に切り広げ４５Ｊ３よび
端縁部分４Ｇおよび４７の保持リング３４の内部直径は
リング３４によって両方のヘッドハーフが第４図に示さ
れるように挿入されるねじを切られたロッド３９なしに
ヘッド２つ上に装設される状態で両方のヘッドハーフ３
２および３３上にリング３４によって及ぼされた張力が
それらが自由にカラ一部分３６のテーパの帛によって決
定される角度内でねじを切られた軸部３６の縦の軸のま
わりを回動するように、そしてそれらが両方のヘッドハ
ーフが受はスリットを含む反対の領域においてよりもリ
ングによって取り巻かれる領域でともに近くにあるよう
にねじを切られたバー３９の挿入に十分な剛い態様でヘ
ッドおよびねじを切られた軸部２６と接続するように選
択される。
第４図および第９図で特に見られるように、受はスリッ
ト３７の深さはねじを切られた軸部３６の縦軸のまわり
に受部２７の自由な可動性を抑制することを避けるため
に、表面３０上で距離をおいて第４図に示される組立て
られた状態でスリットが終わるように選択される。
第４図ないし第１１図に示される実施例に従って茎ねじ
を装設するために、横の茎ねじがまず受はスリットを通
る六角穴への六角ソケットねじキーとの係合によってそ
れぞれの背骨にねじ込まれる。ねじ込んだ後保持リング
３４によって一緒に保持される両方のヘッドハーフ３２
および３３を有する受部２７はねじを切られたロッド３
９がせん断力のいかなる作用もなしに受はスリット３７
に挿入されるように方向が整列される。その後ねじを切
られたロッドは凹所３８にあるそれぞれの締付ねじ４８
および４９によって固定される。締付ねじは、所望され
るように受部３７がヘッド２９のまわりを回動すること
ができず、モして受部２アとねじを切られた軸部２６の
間の実質的に堅い接続が１ｑられるように締付けられる
か、または２つの部分の間の所望の緩衝された動きが依
然として可能であるようにのみ締付けられるかのどらら
かである。
茎ねじの−Ｅ述の実施例の両方を用いることによって、
対称軸のまわりの制限されない自由な動きおよび水平お
よび垂直方向に１００から３０’まで角度領域で好まし
い前もって調整することができる動きが得られる。最後
の示された実施例では茎ねじの全体の長さが特に短いこ
とが付加的に達成されている。
第４図に示される実施例では保持リン′グ３４がねじを
切られた部分２８と反対側に中心を有する半径でねじを
切られた部分２８と向かい合ってその側面でまかれる。
ねじを切られた部分４に向かう六角ヘッド５の下部側は
対応する態様で回されてもよい。この半径の結果、それ
ぞれの背骨に向かう表面はその部分でいかなる損悶も引
き起こし得ない。
発明は特定の具体例の実施例を参照して記載されてきた
が、それは前掲の特許請求の範囲の範囲内にすべての修
正および同等物を含むことが意図されているのが理解さ
れるべきである。
【図面の簡単な説明】
第１図は分解されて一部、喘面で拡大された表示の茎ね
じの第１の実施例を示す。 第２図は第１図で示される位置に関して９０’だけ回転
させた受部を示す。 第３図は第１図で示されるねじの組合わされた表示であ
る。 第４図は第２の実施例の側面および部分断面図である。 第５図は拡大された第４図の一部である。 第６図は第５図で示される部分の平面図である。 第７図は縮尺を変化させた第４図の一部を示す。 第８図は９００だけ回転させた第７図に示される部分の
部分断面表示である。 第９図は第７図で示される部分の後ろの部分である。 第１０図は第８図で示される部分の平面図である。 第１１図は拡大された縮尺の第４図で示される実施例の
リング部材を示す。 図において、１はねじ、２はねじを切られた軸部、３（
は受部、４はねじを切られた部分、５は六角ヘッド、６
は突起、７は外部ねじ、８は凹所、９はロックナツト、
１０は内部ねじ、１１は凹所、１２は凹所、１３は穴、
１４は接続部材、１５は球状部分、１６は円筒形部分、
１７は穴、１８はロッキングビン、１つは内部穴、２０
は交差穴、２１は受はスリット、２２およ２３は凹所、
２５は横茎ねじ、２６はねじを切られた軸部、２７は受
部、２８はねじを切られた部分、２つは球状セグメンの
型のヘッド、３０は表面、３１は六角穴、３２および３
３は双ヘッドハーフ、３４は保持リング、３５は球状セ
グメントの型の部分、３６はカラ一部分、３アは受はス
リブ１〜．３８は凹所、３つはねじを切られたロッド、
４０は溝の型の凹所、４１は中心、４２は平面、４３は
ギτＩツブ、４４（ユ内部表面、４５は切り広げ、４６
および４７は横の端縁部分である。

Claims (15)

    【特許請求の範囲】
  1. （１）ねじを切られた軸部とロッドを受取るための受取
    部とを含み前記受取部は前記ねじを切られた軸部のヘッ
    ドの側に設けられかつ関節でつながれる態様で前記ねじ
    を切られた軸部に結合される、脊椎セグメントを安定さ
    せるための茎ねじ。
  2. （２）前記ねじを切られた軸部と前記受取部が第１の軸
    のまわりの相対的な動きを可能にする関節によって結合
    される、特許請求の範囲第１項に記載の茎ねじ。
  3. （３）関節が第１の軸に横に延在している第２の軸のま
    わりの相対的な動きを可能にする、特許請求の範囲第２
    項に記載の茎ねじ。
  4. （４）関節でつながれた接合がロックされるように適合
    される、特許請求の範囲第１項に記載の茎ねじ。
  5. （５）前記ねじを切られた軸部と前記受部が接続部材を
    通して互いに接続される、特許請求の範囲第１項に記載
    の茎ねじ。
  6. （６）前記接続部材が球状の形のまたは球状セグメント
    の形の部分を含み、かつ前記ねじを切られた軸部は前記
    部分を受取るボールカップを含む、特許請求の範囲第５
    項に記載の茎ねじ。
  7. （７）前記接続部材が円筒形の部分を含み、かつ前記受
    部が前記円筒形部分を受取る中空の円筒形凹所を含む、
    特許請求の範囲第６項に記載の茎ねじ。
  8. （８）前記円筒形部分および前記受部は互いに回転して
    固定されるよう適合される、特許請求の範囲第７項に記
    載の茎ねじ。
  9. （９）前記ねじを切られた軸部と前記受部の間の接合が
    それがほぼ堅いかまたはしっかりとするように調整され
    て適合される、特許請求の範囲第１項に記載の茎ねじ。
  10. （１０）前記ボールカップに前記球状の形の部分を固定
    するロックナットを含む、特許請求の範囲第９項に記載
    の茎ねじ。
  11. （１１）前記受部がリングによって一緒に保持される２
    つのヘッドハーフを含む、特許請求の範囲第１項に記載
    の茎ねじ。
  12. （１２）前記ねじを切られた軸部がそれぞれの内部の球
    状セグメントの形の部分でその上に休止する前記ヘッド
    ハーフを有する球状セグメントの形のヘッドを含む、特
    許請求の範囲第１１項に記載の茎ねじ。
  13. （１３）前記球状セグメントの形の部分の中心がもしこ
    れらが前記リングによって前記ヘッドのまわりに保持さ
    れるなら両方のヘッドハーフの間のギャップがあるよう
    に位置決めされる、特許請求の範囲第１２項に記載の茎
    ねじ。
  14. （１４）前記ヘッドがねじ駆動装置と係合するための手
    段を含み、前記手段は前記受部を通ってアクセス可能で
    ある、特許請求の範囲第１２項に記載の茎ねじ。
  15. （１５）前記ヘッドハーフがねじを切られた軸部に向か
    うその端縁で溝形の窪みを有し、かつ前記リングはその
    内部の側面に突起を含み、前記突起は前記窪みと係合す
    る、特許請求の範囲第１１項に記載の茎ねじ。
JP62101107A 1986-04-25 1987-04-23 茎ねじ Granted JPS62277954A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3614101A DE3614101C1 (de) 1986-04-25 1986-04-25 Pedikelschraube
DE3614101.1 1986-04-25

Publications (2)

Publication Number Publication Date
JPS62277954A true JPS62277954A (ja) 1987-12-02
JPH058011B2 JPH058011B2 (ja) 1993-02-01

Family

ID=6299563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62101107A Granted JPS62277954A (ja) 1986-04-25 1987-04-23 茎ねじ

Country Status (8)

Country Link
US (1) US4946458A (ja)
EP (1) EP0242708B1 (ja)
JP (1) JPS62277954A (ja)
KR (1) KR950006929B1 (ja)
AT (1) ATE82484T1 (ja)
CA (1) CA1328591C (ja)
DE (2) DE3614101C1 (ja)
ES (1) ES2035826T3 (ja)

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US4946458A (en) 1990-08-07
EP0242708A2 (de) 1987-10-28
ES2035826T3 (es) 1993-05-01
JPH058011B2 (ja) 1993-02-01
EP0242708A3 (en) 1988-03-23
KR950006929B1 (ko) 1995-06-26
KR870010327A (ko) 1987-11-30
EP0242708B1 (de) 1992-11-19
ATE82484T1 (de) 1992-12-15
DE3782678D1 (de) 1992-12-24
DE3614101C1 (de) 1987-10-22
CA1328591C (en) 1994-04-19

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