Cervical pedicle screw alignment apparatus

A pedicle screw and aimer technology, which is applied in the field of cervical spine surgery equipment, can solve the problems of high difficulty, high surgical risk, and low biomechanical fixation strength

Inactive Publication Date: 2010-10-27
徐兆万
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of lateral mass screw fixation are: the fixation force arm is short, the biomechanical fixation strength is not high, and the three-dimensional orthopedic and fixation effects are not good.
More and more clinicians use pedicle screw fixation technology. Due to the thinner cervical pedicle and its complex adjacent relationship, it is difficult to grasp the implantation angle when implanting the pedicle screw by hand, so the operation is risky and difficult. ; Currently, computer navigation technology is used to implant pedicle screws, but it is expensive, and general hospitals cannot be equipped with this equipment or patients cannot afford the high cost

Method used

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  • Cervical pedicle screw alignment apparatus
  • Cervical pedicle screw alignment apparatus
  • Cervical pedicle screw alignment apparatus

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Embodiment Construction

[0017] Cervical pedicle screw aimer as shown in the accompanying drawing, it comprises connecting rod 1, and one end of connecting rod 1 is equipped with spinous process clamp 2, and the other end is equipped with connecting plate 3, and spinous process clamp 2 can play The role of fixing and positioning the relative position between the sight and the cervical vertebrae, so it can adopt different structural forms. In the embodiment of the present invention, the spinous process clamp 2 includes a left pincer bar 21 and a right pincer bar hinged together 22. The front ends of the left and right clamp rods are equipped with jaws, and the rear ends are equipped with clamping devices. The shape of the jaws is as follows: figure 1 shown in , especially suitable for clamping vertebral bodies. Left pincer bar 21 is provided with hinge shaft 23, and right pincer bar 22 is provided with two reaming holes 24, and non-return plate 26 is installed in the reaming hole 24, and the end of hin...

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Abstract

The invention discloses a cervical pedicle screw alignment apparatus. The apparatus comprises a spinous process clamp and a connecting rod fixedly arranged on the spinous process clamp; the other end of the connecting rod is provided with a connecting plate; an angle adjusting rod is hinged on the connecting plate; a guide rod is inserted into the angle adjusting rod; the angle adjusting rod is also connected with a locking angle adjusting rod and a locking device for the guide rod; the guide rod is connected with an open-circuit conical cylinder into which an open-circuit cone is inserted; and the angle adjusting rod is also provided with an annular table and a sleeve gasket sleeved on the annular table, the sleeve gasket is axially and glidingly connected with the annular table, and the lateral surface of the sleeve gasket is provided with angle marking lines. The cervical pedicle screw alignment apparatus has the advantages of simple structure and convenient operation, can accurately position a pedicle screw implanting angle, and greatly improves the success rate of operation.

Description

technical field [0001] The invention belongs to the field of instruments for cervical spine surgery, in particular to a cervical spine pedicle screw aimer. Background technique [0002] With the development of cervical spondylosis treatment technology, more and more posterior cervical fixation techniques are used in spinal surgery. There are two commonly used techniques at present: 1. Lateral mass screw fixation technique; 2. Pedicle screw fixation technique. The disadvantages of lateral mass screw fixation are: the fixation force arm is short, the biomechanical fixation strength is not high, and the three-dimensional orthopedic and fixation effects are not good. More and more clinicians use pedicle screw fixation technology. Due to the thinner cervical pedicle and its complex adjacent relationship, it is difficult to grasp the implantation angle when implanting the pedicle screw by hand, so the operation is risky and difficult. ; Existing computer navigation technology is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/90
Inventor 徐兆万门阔业王春雷张在青张晓霞朱艳艳
Owner 徐兆万
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