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Hinged polyaxial screw and methods of use

A hinged and spherical technology, applied in the direction of fixators, internal fixators, fastening devices, etc., can solve the problems of changing the range of motion of the spine and irreversibility

Inactive Publication Date: 2008-12-03
PARADIGM SPINE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This fusion process is irreversible / irreducible and may significantly alter the range of motion of the spine
In addition, existing surgical approaches are often only available for patients in a significantly worsened state

Method used

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  • Hinged polyaxial screw and methods of use
  • Hinged polyaxial screw and methods of use

Examples

Experimental program
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Embodiment Construction

[0020] FIG. 1A illustrates the components of a bone anchor device 100 and a rod connection system 120 according to an exemplary embodiment. Bone anchor device 100 can include a threaded shaft 160, which can be configured to securely engage one or more bone structures. The bone anchoring device 100 may also include a head 180 securely attached to the shaft 160 , and a cover 200 . Cover 200 may form a hinged connection 220 with head 180 , and head 180 and cover 200 may together form part of a generally spherical cavity 240 . A generally spherical connector 260 may be provided as part of the rod connection system 120 to facilitate secure connection of the bone anchor device 100 to an implant, such as a stabilizer rod 140, as shown in Figures 2A and 2B. Connector 260 may be configured to be seated within cavity 240 in use.

[0021] As shown, the stabilizer bar 140 comprises a cylindrical rod. However, it should be understood that the rod 140 may comprise any type or variety of ...

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PUM

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Abstract

A bone-anchoring device (100) is provided. The device may include a substantially rigid shaft (160) having a threaded portion configured to engag bone. The bone-anchoring device may further include a head portion (180) securely attached to the shaft and a cap portion (200) having a hinged connection (220) with the head portion. A substantially spherical cavity(240) may be formed between the head portion and the cap portion.

Description

[0001] This application claims the benefit of U.S. Provisional Application No. 60 / 722,337, filed September 30, 2005, the contents of which are incorporated herein by reference. technical field [0002] The present invention relates to devices and methods for anchoring surgical implants to bone tissue. In particular, the present invention relates to polyaxial screws that may be configured for use in bone stabilization devices such as implantable rod stabilization systems. Background technique [0003] Spinal disorders lead to serious conditions. These disorders include abnormalities in the spine, intervertebral discs, facet joints, and connecting tissues that surround the spine. These abnormalities may arise from a variety of factors, including mechanical injury or degenerative disc disease. These abnormalities can lead to instability of the spine, making the spine misaligned and producing abnormal movements between adjacent vertebrae. More severe disease can wear down the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61B17/86
CPCA61B17/704A61B17/8605A61B17/7032A61B17/70A61B17/86
Inventor G·L·洛韦里F·T·特劳特魏因
Owner PARADIGM SPINE LLC