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Perfusion type pedicle screw

A pedicle screw and perfusion technology, which is applied in the direction of internal fixator, internal bone synthesis, fixer, etc., can solve the problems of insufficient fixation strength and stability, facilitate revision and re-implantation of screws, and improve fixation Strength and stability, the effect of enhancing fixation strength and stability

Inactive Publication Date: 2011-02-09
陆宁 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of insufficient fixation strength and stability of existing pedicle screws after implantation, the present invention provides a perfusion pedicle screw, which solves this problem in a targeted manner and improves the Fixation strength and stability after screw placement

Method used

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  • Perfusion type pedicle screw
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Experimental program
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Embodiment Construction

[0024] The technical solution of the present invention will be described in detail below.

[0025] figure 1 and figure 2 The structure of the perfusion pedicle screw of the present invention is shown. figure 1 and figure 2 The left end of the center is the screw head of the pedicle screw, the thread on the right side of the screw head to the right end of the pedicle screw is the screw body 1, and the screw body 1 is the main body where the pedicle screw is implanted into the bone. The nail body 1 is a hollow structure, and there is a cavity 4 in the nail body 1, the cavity 4 communicates with the injection port 3 provided on the nail head, and the cavity 4 also communicates with the seepage port 2 provided on the nail body 1. The position of the exudation port on the nail body 1 is within the following range: the nail body 1 contacts the pedicle after being implanted into the vertebra and positioned. This range can also be described in the following manner: after the nai...

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Abstract

The invention belongs to a medical appliance. The invention provides a perfusion type pedicle screw for solving the problems that the existing pedicle screw has insufficient fixation strength and insufficient stability after implantation, which comprises a hollow screw body, that is a cavity is arranged in the screw body, the cavity is communicated with an injection port arranged on a screw head, an exsudation port communicated with the cavity is further arranged on the screw body, and the exsudation port is completely positioned in the range of being contact with pedicle of vertebral arch after the perfusion type pedicle screw is implanted into spine for positioning of the screw body. The perfusion type pedicle screw can be applied in the transpedicular internal fixation method.

Description

technical field [0001] The invention relates to a screw for fixation used in orthopedic surgery, especially a screw for fixation on the spine. Background technique [0002] In spinal surgery, pedicle screw internal fixation technology has been used for many years. The main function of spinal internal fixation is to stabilize the dynamic segment of the spine to promote its fusion. The transpedicular internal fixation method makes the spine have the best mechanical stability, so this technique is widely used, especially in the fixation of the thoracolumbar spine. [0003] Through pedicle fixation, screws are implanted into the spine, and the screws are in contact with the pedicle and vertebral body in turn. The key to pedicle screw fixation is to stabilize the implanted screw. Clinical practice shows that even if the screw is implanted in the correct position and direction, there may still be phenomena such as screw loosening, pulling out or breaking, which is mainly caused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61B17/86
Inventor 陆宁肖嵩华
Owner 陆宁
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