TWI235794B - Bone anchoring device - Google Patents

Bone anchoring device Download PDF

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Publication number
TWI235794B
TWI235794B TW091104881A TW91104881A TWI235794B TW I235794 B TWI235794 B TW I235794B TW 091104881 A TW091104881 A TW 091104881A TW 91104881 A TW91104881 A TW 91104881A TW I235794 B TWI235794 B TW I235794B
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Taiwan
Prior art keywords
screw
thread
rod
exposed
female thread
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TW091104881A
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English (en)
Inventor
Lutz Biedermann
Dezso Jeszensky
Jurgen Harms
Helmar Rapp
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Biedermann Motech Gmbh
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037Screws 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

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  • 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

1235794 五、發明說明(1) 本發明係關於一種元件,可用於脊柱或事故手術,以 供連接於桿。 由US5, 1 2 9, 3 88號已知申請專利範圍第1項前序句之有 腳螺釘,包括釘頭,有U形凹部,界定二自由腳,以容納 桿,其中腳設有陰螺紋,以接受固定螺釘,把桿固定。為 防止腳張開,設有螺蓋,抱住腳部。 由US5,005,562號已知申請專利範圍第1項前序句之有 腳螺釘,構成陰螺紋,而螺釘的螺紋與之合作成為鋸齒螺 紋,如此一來,在螺合時完全消除徑向力成份,而避免二 螺腹張開。 此種鋸或鋸齒螺紋,已 Mannhein, 1974 ,第 302頁。 關植入的—專利說明書,可 是臀部植入,也要構成鋸齒 腹,不但構成對螵紋軸線呈 可以達成與螺紋所得連接, 動’因而保證植入更加固定 有腳螺釘,其中容納桿的釘 合作的螺紋即相對應構成。 本發明之目的,在於提 述特點,特別是應避免此種 螺釘和桿間之連接。 見於Meyer氏編Lexikon百科, 由 US5, 6 0 5, 458 和 5, 60 7, 304 有 知此類植入要進入體内,尤其 螺紋,其方式是承載負荷的螺 9 0° ,甚至呈負角度。這假設 抵抗所連接組件的徑向相對運 。由 EP-A- 1 1 2 8 773 已知一種 頭陰螺紋具有負螺紋,而與之 供先前所述元件,適於避免上 安裝件開口端的彎曲,而鬆脫 此目的是利用申請專利範圍第1項的特徵元件達成。 此項構造之優點是,露出腳與陰螺紋間的力量作用
1235794 五、發明說明(2) 使得保持元件的開口端不會被屋朝外,而是向内拉,故合 作元件之間發生強力結合。 本發明其他特點和優點由具體例參照附圖說明即可明 白。附圖中: 第1圖表示單軸有腳螺釘平分分解之側視圖; 第2圖表示第1圖所示有腳螺釘的釘頭,以及插入的桿 和插入的螺帽; 第3圖表示第2圖所示細部ΠΙ之放大圖; 第4圖表示第2圖選用表示多軸螺釘之斷面圖; 第5圖表示保持元件之簡圖,有插入桿並鬆旋内螺釘; 第6圖表示第5圖内細部VI之放大圖; 第7圖表示相當於第5圖所示,惟内螺釘已旋緊; 第8圖表示第7圖所示細部VI之放大圖。 按照第1圖之有腳螺釘,當然一般亦可作為骨骼螺釘, 或構成钩件’有釘呈1和釘頭2。釘頭2有U形凹部4 ’按螺 釘的縱軸3方向延伸,有預定深度。由此構成的二腳5, 6上 設有陰螺紋8,從腳的開口端7下來。配合陰螺紋8,設有 螺釘9,其陽螺紋構成與陰螺紋8合作。 操作時,要連接於螺釘的桿1 0,置於U形凹部4内, 使桿定置在U形凹部底。螺釘9再螺入遠達對位在U形凹 部内的桿1 0施以充分停止壓力。 詳見第2和3圖,釘頭2内的陰螺紋和螺釘9的陽螺紋, 構成鋸齒螺紋。背離要固定桿1 0的表面1 1上,螺釘9有縫 隙或六角形凹部,以供螺絲起子插入。
1235794 五、發明說明(3) 在各情況下,螺紋内二相鄰部份螺腹1 2,1 3形成螺距 。二部份螺腹1 2,1 3包圍成螺腹角度万。朝向開口端7的螺 腹側13,與平面40包圍成正角/Si,垂直於縱軸3延伸,並 與螺紋底2 3的螺腹側1 3交叉(見第3圖)。背離開口端的部 份螺腹1 2,傾斜如第3圖所示方式,與相對於平面4 0包圍 成負角/9 2。由圖可見,螺釘9的螺紋相對應,故螺釘9的 螺距適度結合於陰螺紋8。所以在螺釘9内,朝向開口端7 或表面1 1的各螺腹形成負角/S 2,與相對應螺腹1 2合作。 第4圖所示具體例一致相當於陰螺紋8和合作螺釘9, 以及桿1 0之構造。相對應特點以同樣參玫符號標示。 與第一具體例相對地,有所謂多軸螺釘,其中釘莖1 經由球形釘頭1 4連接到接受件1 5。接受件一端為軸向對稱 的對準第一腔孔1 6,其直徑比螺紋段1為大,比釘頭1 4為 小.。接受件又有共軸第二腔孔1 7,在第一腔孔的相反端開 啟,其直徑大到足夠螺釘元件被引導通過開口端,其螺紋 段通過第一腔孔,而釘頭1 4至第二腔孔底。在第一腔孔和 第二腔孔之間設有小小共軸段,直接鄰接第一腔孔,並構 成朝開口端的球形,其中半徑與釘頭1 4的球-扇形段半徑 實質上一致。又設有陰螺紋8,鄰接腳5,6的開口端7。接 受件1 5又有U形凹部1 8,以組件中心對稱配置,其底指向 第一腔孔,其二側腳5朝開口端7延伸。此外,在第二腔孔 1 7内置放加壓元件,位於球形釘頭1 4上。操作時,桿1 0插 入U形凹部内。再旋轉螺釘9,按第2圖所示同樣方式,旋 轉到對壓力元件1 9和釘頭1 4施以所需壓力,加以停止。
1235794 五、發明說明(4) 釘頭或接受組件均連接於骨骼螺釘的上述具體例,亦 可改為釘頭或接受組件連接於鈎件,鈎件正如脊柱手術所 用,鈎住脊柱的骨骼突部後面。 以上述鋸齒螺紋而言,只假設以部份螺腹方向為特徵 。圓尖和圓底螺紋、銳螺紋和銳螺紋底,平螺紋邊和平螺 紋底,均應包含在内,三角形螺紋、圓滑螺紋和梯形螺紋 亦然。 具有公制螺紋的已知螺釘中,螺釘施壓於桿的方式如 第2圖所示,一分力作用於螺釘的開口側1 1,第二分力貝ij 向外作用,以上述本發明螺紋而言,一分力也是作用於開 口 7,但第二分力則在縱軸3方向作用。結果,露出的腳5, 6不會被逼向外,而是朝對稱軸線拉。 第5圖一如第2圖,所示第1圖之有腳螺釘釘頭,有桿 插入,起初只插到陰螺紋9。第6圖詳示第5圖細部VI之斷 面。由此放大圖可知,内螺釘和腳5的陽螺紋彼此相關尺 寸如下:從與縱軸3 —致的螺釘中心到螺釘9的螺紋底2 1之 半徑T 1,比與對稱軸3 —致的保持元件中心軸到其螺線2 0 尖端之半徑T 2為小。與縱軸3 —致的螺釘中心到螺釘9螺 線尖端之半徑T 3,比與縱軸3 —致的保持元件中心軸到其 陰螺紋的螺紋底2 3之半徑7 4為小。 詳見第6圖,螺釘9和保持元件的露出腳5,6無負載結 合時,當螺釘的陰螺紋2 4具有正螺腹角的合作螺腹彼此相 鄰,則具有負螺腹角的彼此相向螺腹1 2,2 6間即有間隙 25 °
第7頁 1235794 五、發明說明(5) 第7圖顯示第5和6圖之同樣目的,其中螺釘9已向内旋 入遠到夠壓到桿1 0,而對螺釘9施以箭頭2 7所示抗衡力。 結果,由第8圖可見在各情況下彼此相向的螺腹1 2,2 6,以 負螺腹角/5 2到彼此頂部為止,於此陰螺紋的螺線2 8,2 9朝 螺釘9的螺距各底部21向内拉,如第8圖所示方式,結果露 出的腳不是向外而是向内偏壓。 在較佳具體例中,半徑T :和7 2相差約為螺紋外徑的1 -5%,或以螺釘直徑5-12111111而言,相差0.1-0.5111111。
第8頁 1235794 案號 91104881 年 月 曰 修正 圖式簡單說明 第1圖表示單軸有腳螺釘平分分解之側視圖; 第2圖表示第1圖所示有腳螺釘的釘頭,以及插入的桿 和插入的螺帽; 第3圖表示第2圖所示細部ΙΠ之放大圖; 第4圖表示第2圖選用表示多軸螺釘之斷面圖; 第5圖表示保持元件之簡圖,有插入桿並鬆旋内螺釘; 第6圖表示第5圖内細部VI之放大圖; 第7圖表示相當於第5圖所示,惟内螺釘已旋緊; 第8圖表示第7圖所示細部Μ之放大圖。 元件符號說明
1 釘莖 40 平面 2 釘頭 21,23 螺紋底 3 縱軸 14 球形釘頭 4, 18 U形凹部 15 接受件 5, 6 腳 16 第一腔孔 7 開口端 17 第二腔孔 8, 24 陰螺紋 19 壓力元件 9 螺釘 2 0, 2 8, 2 9 螺線 10 桿 25 間隙 11 表面 27 箭頭 12, 13, 26 螺腹 第9頁

Claims (1)

1235794 年
案號 91104881 申請專利範圍 六 1· 一種骨骼固定裝置,具有釘莖(1) 件(2),以供連接於桿(10),其中保^持元妾之保持元 =父斷面,可容納桿⑽,一端⑺露出二:有『部⑷ 出=(5,6)有陰螺紋(8),螺釘(9)與陰螺紋(作㈧,露 釘直接或間接作用於桿(10),其中在陰螺紋乍,該螺 份螺腹(12, 13),彼此鄰接,背離暴露端(7)的 有麻二部 (12, 26),與通過螺紋底(23)的平面包圍成負 刀螺腹 於螺釘軸(3)延伸,而與陰螺紋(8)合作的螺釘 2,垂直 此嚙合之陽螺紋,而其中從螺釘(3)中心到螺釘(9 ’有與 (21) 之半徑Ul) ’比從保持元件的中心軸(3)到(其線纹底 (22) 尖端之半徑(r D為小,而從螺釘(3)中心到螺釘= 的螺線(22 )尖端之半徑(τ D ’比從保持元件的中心軸(3 到其陰螺紋的螺紋底(23)之半徑(r4)為小,當螺釘(9)和 保持元件露出腳(5, 6)在無負載下結合,具有正螺腹角石^ 的合作螺腹(13, 24)彼此相鄰時’具有負螺腹角冷2的螺腹 (1 2,2 6 )間即具有彼此相向之間隙(2 5 )者。 2·如申請專利範圍第1項之骨骼固定裝置,其中露出 腳(5, 6)的螺紋底(23)係構成圓滑者。 ~
TW091104881A 2000-12-27 2002-03-15 Bone anchoring device TWI235794B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10065396 2000-12-27
EP01106711A EP1219255B1 (de) 2000-12-27 2001-03-16 Schraube zum Verbinden mit einem Stab

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TWI235794B true TWI235794B (en) 2005-07-11

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US (2) US7018378B2 (zh)
EP (1) EP1219255B1 (zh)
JP (1) JP4395284B2 (zh)
KR (1) KR100687089B1 (zh)
DE (1) DE50100793D1 (zh)
TW (1) TWI235794B (zh)

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TWI426884B (zh) * 2005-08-24 2014-02-21 Biedermann Technologies Gmbh 連接至少二骨骼固定元件用之桿狀植入元件及骨骼穩定裝置

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US7018378B2 (en) 2006-03-28
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EP1219255B1 (de) 2003-10-15
JP4395284B2 (ja) 2010-01-06
JP2002330976A (ja) 2002-11-19
DE50100793D1 (de) 2003-11-20
EP1219255A1 (de) 2002-07-03
KR20020073427A (ko) 2002-09-26
US20070055238A1 (en) 2007-03-08

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