Minimally invasive composite self-tapping pedicle screw

A pedicle screw and self-tapping technology, which is applied in the fields of internal bone synthesis, medical science, fastening devices, etc., can solve problems such as poor stability and inconvenient application of pedicle screws, and reduce the risk of pull-out and fracture risk, reduce the risk of screw breakage, increase the effect of pull-out resistance

Inactive Publication Date: 2014-05-14
王国喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a minimally invasive Composite self-tapping pedicle screw not only has a simple structure and is easy to position, but also has self-tapping puncture and good stability

Method used

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  • Minimally invasive composite self-tapping pedicle screw

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Embodiment Construction

[0011] The principles and advantages of the present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

[0012] like figure 1 As shown, it includes a hollow ball head threaded screw shaft and a U-shaped nail arm that are integrally arranged. The hollow ball head screw is provided with a negative vertebral double-line wide thread, and the thread near the spherical surface of the head is a dense thread. The part close to the screw tip is a sparse thread, and the screw tip is also provided with a self-tapping cutting edge. Wherein, a blind hole is provided on the outer surface of the staple arm. The purpose of setting the blind hole is to assist the rod presser to play the role of positioning support when pressing the rod, and at the same time

[0013] It can enhance the stability of the pedicle screw during implantation.

[0014] It should be noted that the preferred embodiments of the invention include the best mode know...

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Abstract

The invention provides a minimally invasive composite self-tapping pedicle screw which aims at overcoming the shortcoming that the existing pedicle screw is inconvenient to apply and poor in stability in the actual operation. The screw comprises a hollow ball threaded nail rod and a U-shaped nail arm which are arranged integrally. Negative taper double-line wide-tooth threads are arranged on the hollow ball screw, the threads close to the spherical portion of the head portion are compact threads, the threads close to the screw tip portion are sparse threads, and a self-tapping edge is further arranged on the screw tip portion. By means of the improvement, the pedicle screw is easy to locate and good in stability by means of self-tapping puncture and enables a minimally invasive spine fusion operation to be conducted smoothly.

Description

technical field [0001] The invention relates to a surgical medical instrument, in particular to a minimally invasive pedicle screw of a spinal internal fixation instrument. Background technique [0002] Existing pedicle screws include a threaded screw rod and a U-shaped nail arm. The threaded screw rod is solid. The junction of the facets spirals into the pedicle. The process of installing the pedicle screw is as follows: First, open a 5-7 cm opening in the body at the pedicle, find the junction of the midline of the transverse process on the vertebral body and the superior articular process, and use this as the entry point , the pedicle screw is screwed into the pedicle to play the role of installing the pedicle screw. This operation has the following disadvantages: because the operator may deflect during the operation when the pedicle screw is screwed in, the pedicle screw will pass through the upper, lower, inner or outer sides of the pedicle. The deviation of the pedi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/86A61B17/70
CPCA61B17/86A61B17/00234A61B17/70A61B2017/8655
Inventor 王国喜
Owner 王国喜
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