CN1838920A - 阻尼件 - Google Patents

阻尼件 Download PDF

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CN1838920A
CN1838920A CNA038271338A CN03827133A CN1838920A CN 1838920 A CN1838920 A CN 1838920A CN A038271338 A CNA038271338 A CN A038271338A CN 03827133 A CN03827133 A CN 03827133A CN 1838920 A CN1838920 A CN 1838920A
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damping piece
clamping body
central axis
bearing shell
spring element
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S·哈特曼
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AO Technology AG
Synthes GmbH
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Synthes AG Chur
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    • 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
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A61B17/7023—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a pivot joint
    • 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
    • A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
    • A61B17/7013—Longitudinal element being non-straight, e.g. curved, angled or branched the shape of the element being adjustable before use
    • 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
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A61B17/7026—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form
    • A61B17/7028—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form the flexible part being a coil spring

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (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)
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Abstract

本发明涉及一种用于动态稳定两根骨、特别是两个相邻椎骨体的阻尼件(1)，该阻尼件具有一条中心轴线(11)以及具有A)一个与中心轴线(11)相交的第一端部(12)、一个与中心轴线(11)相交的第二端部(13)以及一个设置在它们之间的与中心轴线(11)同轴的弹簧元件(10)，其中B)至少在弹簧元件(10)的一个端部(12、13)上集成一个借助于夹紧装置(40)可以可拆式锁定的、与中心轴线(11)同心的球节(20)。

Description

阻尼件
技术领域
本发明涉及一种按权利要求1的前序部分所述的阻尼件。
背景技术
由EP-A 0 516 567 NAVAS已知一种同类的用于动态稳定两根相邻椎骨体的阻尼件。这种已知的阻尼件包括一个各带有一个沿轴向位于外部的球状凸形的连接部分的同轴阻尼体，阻尼件可以借助于该连接部分固定在两个椎弓根螺钉上。通过这两个连接部分与椎弓根螺钉头部之间的这种球节式连接可以使阻尼件以在椎弓根螺钉纵轴线与阻尼件中心轴线之间可变的角度与椎弓根螺钉连接。这种已知的阻尼件的缺点在于，阻尼件的几何形状预定椎弓根螺钉之间的距离。
发明内容
在此本发明消除弊病。本发明的任务在于实现一种阻尼件，该阻尼件至少在其一个端部上可多轴线摆动地并且可轴向伸缩地与一根纵梁连接。
本发明通过一种具有权利要求1的特征的阻尼件来解决所提出的任务。
通过本发明实现的优点主要在于，由于该阻尼件借助于至少一个集成在该阻尼件的一个端部上的球节连接：
-在球节脱开的状态下，阻尼件可以可多轴线摆动地与一个椎骨体稳定装置的一根杆状纵梁连接。因此在脊柱稳定装置内植入纵梁时不必弯曲纵梁；并且
-该阻尼件可以可轴向伸缩地与一个椎骨体稳定装置的一根杆状纵梁连接。
本发明的其它优选的改进方案在从属权利要求中给出。
在一种优选的实施形式中，所述球节包括一个球状凸形的、可沿径向弹性压缩的夹紧体，该夹紧体具有一个在直径上的、具有孔轴线的中心孔，使得在夹紧体压缩时一根***到中心孔内的杆状纵梁相对于夹紧体锁定在中心孔内。
所述球节优选允许夹紧体以一个在夹紧体内的中心孔的孔轴线与弹簧元件的中心轴线之间测量的在0°至±25°范围内的角度α转动。由此可以实现的优点在于，一根***到夹紧体的中心孔内的杆状纵梁可以相对于弹簧元件摆动，并且因此该杆状纵梁不必弯曲。
球节优选包括两个轴向分开的、至少部分容纳夹紧体的轴瓦，使得在轴瓦相互压紧时均匀地压缩夹紧体并且从而可以刚性地锁定球节。
在另一种实施形式中，所述轴瓦可以借助于夹紧装置沿轴向压向夹紧体，其中所述弹簧元件优选在其第一端部上具有一个同轴的、具有螺纹的轴颈，并且所述第一轴瓦在轴向末端集成到轴颈内，使得该轴瓦向着弹簧元件的第二端部逐渐变细。所述夹紧装置优选构成为螺母，该螺母可以拧到轴颈的螺纹上。第二轴瓦优选同心地集成在螺母的孔内。
在另一种实施形式中，所述螺母包括一个同轴的孔，该孔具有至少两个轴向相邻的纵向段，其中指向弹簧元件的位于外部的纵向段具有一个与轴颈的螺纹互补的内螺纹，并且在设置于其旁边的纵向段中集成第二轴瓦，使得该轴瓦向着位于外部的纵向段扩宽。
为了将一根杆状纵梁穿过夹紧装置，该夹紧装置是同轴穿孔的。
在另一种实施形式中，所述夹紧体具有一个与中心孔的孔轴线平行的切口，该切口从夹紧体的外壁穿透夹紧体的壁一直到中心孔。
在另一种实施形式中，该阻尼件包括一个在其一个端部上同轴的杆状连接部分，该连接部分可以与一个接骨稳定装置内的另一部件连接。
在另一种实施形式中，阻尼件还包括一个可***到夹紧体中心孔内的并且可以可拆式固定在夹紧体内的杆状纵梁。
附图说明
下面根据部分示意示出的多个实施例的视图详细说明本发明和本发明的改进方案。附图示出：
图1按本发明的阻尼件的一种实施形式的纵剖面图；
图2在图1中用圆A标记的局部的放大视图。
具体实施方式
在图1和2中示出了一种实施形式，它包括一个空心圆柱形的阻尼件1，该阻尼件具有一条中心轴线11和一个可以可拆式锁定的球节20，该球节用于将阻尼件1与一根具有纵轴线4的杆状纵梁3可多轴线摆动地连接。该阻尼件1除了球节20之外还包括一个弹簧元件10，该弹簧元件在此所示的实施例中包括一个金属的螺旋弹簧和一个压入到弹簧圈之间的间隙30内的并且使空腔15在直径上变窄的塑料件31。球节20设置在弹簧元件10的第一端部12上，而在弹簧元件10的轴向相反的第二端部13上设置一个同轴的杆状连接部分16，它适用于与脊柱稳定装置的另一部件(未示出)连接。这里球节20包括一个球状凸形的夹紧体21和两个与夹紧体21互补地凹形的轴瓦23、24，所述夹紧体带有一个具有孔轴线27的中心孔22。第一轴瓦23与中心轴线11同心地集成到弹簧元件10的第一端部12上的螺纹轴颈39内，使得该第一轴瓦向着阻尼件1中的空腔15逐渐变细。螺纹轴颈39被一个与中心轴线11同轴的、通入到空腔15内的孔14穿透，使得该孔14适用于安装一根穿过夹紧体21内的中心孔22导引的杆状纵梁3。第二轴瓦24集成到一个螺母25内，该螺母可以拧到螺纹轴颈39的螺纹26上。在弹簧元件10的第二端部13上封闭空腔15。为了将弹簧元件10的第二端部13与另一部件、例如椎弓根螺钉或者椎弓根钩的头部(未示出)连接，在弹簧元件10的第二端部13上设置一个与中心轴线11同轴的杆状连接部分16。
如图2所示，夹紧体21设有一个与孔轴线27平行的切口28，所述切口从夹紧体21的外壁29穿透夹紧体21一直到中心孔22。由此在拧上螺母25时，设置在轴瓦23、24之间的夹紧体21夹紧固定在轴瓦23、24之间，并同时沿径向向中心孔22的孔轴线27压缩，这样就锁定了***到中心孔22内的纵梁3。
螺母25被一个与中心轴线11同轴的孔32穿透，该孔具有多个不同几何形状的轴向相邻的纵向段34、35、36。与阻尼件1的第一端部12相邻的纵向段34设有一个与在弹簧元件10第一端部12上的螺纹26互补的内螺纹33，而中间纵向段35包括同样穿孔的第二轴瓦24，并且位于外部的纵向段36构成为锥形的。在此第二轴瓦24设置成使其向着位于外部的纵向段36逐渐变细。在位于外部的纵向段36上的锥面38向着螺母25的位于外部的端面37扩宽，这样可以将一根杆状纵梁3可摆动地安装在球节20内。

Claims (12)

1.一种用于动态稳定两根骨特别是两个相邻椎骨体的阻尼件(1)，该阻尼件具有一条中心轴线(11)以及具有
A)一个与中心轴线(11)相交的第一端部(12)、一个与中心轴线(11)相交的第二端部(13)以及一个设置在它们之间的、与中心轴线(11)同轴的弹簧元件(10)，其特征在于：
B)至少在弹簧元件(10)的一个端部(12、13)上集成一个借助于夹紧装置(40)可以可拆式锁定的、与中心轴线(11)同心的球节(20)。
2.按权利要求1所述的阻尼件(1)，其特征在于：所述球节(20)包括一个球状凸形的夹紧体(21)，该夹紧体具有一个在直径上的、具有一条孔轴线(27)的中心孔(22)。
3.按权利要求1或2所述的阻尼件(1)，其特征在于：所述球节(20)允许夹紧体(21)以一个在孔轴线(27)与中心轴线(11)之间测量的在0°至±25°范围内的角度α转动。
4.按权利要求2或3所述的阻尼件(1)，其特征在于：所述球节(20)包括两个轴向分开的、至少部分容纳夹紧体(21)的轴瓦(23、24)。
5.按权利要求4所述的阻尼件(1)，其特征在于：所述轴瓦(23、24)可以借助于夹紧装置(40)沿轴向压向夹紧体(21)。
6.按权利要求4或5所述的阻尼件(1)，其特征在于：所述弹簧元件(10)在其第一端部(12)上具有一个同轴的具有螺纹(26)的轴颈(39)，并且所述第一轴瓦(23)在轴向末端集成到轴颈(39)内，使得该轴瓦(23)向着弹簧元件(10)的第二端部(13)逐渐变细。
7.按权利要求6所述的阻尼件(1)，其特征在于：所述夹紧装置(40)是一个螺母(25)，该螺母可以拧到轴颈(39)的螺纹(26)上，并且所述第二轴瓦(24)与螺母(25)同心地连接。
8.按权利要求7所述的阻尼件(1)，其特征在于：所述螺母(25)包括一个同轴的孔(32)，该孔具有至少两个轴向相邻的纵向段(34、35)，其中指向弹簧元件(10)的、位于外部的纵向段(34)具有一个与螺纹(26)互补的内螺纹(33)，并且在设置于其旁边的纵向段(35)内集成第二轴瓦(24)，使得该轴瓦向着该位于外部的纵向段(34)扩宽。
9.按权利要求1至8所述的阻尼件(1)，其特征在于：所述夹紧装置(40)是同轴穿孔的。
10.按权利要求2至9任一项所述的阻尼件(1)，其特征在于：所述夹紧体(21)具有一个外壁(29)，并且与孔轴线(27)平行的切口(28)从该外壁(29)穿透夹紧体(21)的壁。
11.按权利要求1至10任一项所述的阻尼件(1)，其特征在于：该阻尼件在其第二端部(13)上包括一个同轴地在末端相邻的杆状连接部分(16)，该连接部分可与在一个接骨稳定装置内部的另一部件连接。
12.按权利要求2至11任一项所述的阻尼件(1)，其特征在于：该阻尼件还包括一根可***到中心孔(22)内的并且可以可拆式固定在夹紧体(21)内的杆状纵梁(3)。
CNA038271338A 2003-09-29 2003-09-29 阻尼件 Pending CN1838920A (zh)

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US (1) US20060293657A1 (zh)
EP (1) EP1667592A1 (zh)
JP (1) JP2007506459A (zh)
CN (1) CN1838920A (zh)
AR (1) AR045675A1 (zh)
AU (1) AU2003264225A1 (zh)
BR (1) BR0318519A (zh)
CA (1) CA2540593A1 (zh)
WO (1) WO2005030067A1 (zh)

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US20060293657A1 (en) 2006-12-28
CA2540593A1 (en) 2005-04-07
JP2007506459A (ja) 2007-03-22
AR045675A1 (es) 2005-11-02
EP1667592A1 (de) 2006-06-14
AU2003264225A1 (en) 2005-04-14
WO2005030067A1 (de) 2005-04-07

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