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Lumbar spondyloschisis forcing screw

A lumbar vertebral arch and screw technology, which is used in the field of lumbar vertebral arch rupture compression screws

Inactive Publication Date: 2011-05-18
王德春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned inventions have their own characteristics, they all have some defects, such as relatively complicated accessories, high production costs, poor operation safety, and the effect of the products after application. Not good and the operation steps are relatively cumbersome, the process of implanting the screws is subject to X-ray radiation, etc.

Method used

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  • Lumbar spondyloschisis forcing screw
  • Lumbar spondyloschisis forcing screw
  • Lumbar spondyloschisis forcing screw

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Embodiment Construction

[0023] The present invention will be further disclosed below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 , 2 As shown in , 3, the lumbar vertebral arch rupture compression screw 3 is composed of a fastening cap 1 and a self-tapping screw 2, wherein the nail head part of the self-tapping screw 2 is limited in the fastening cap 1, and the two can rotate freely to form a Flexible connection, which can adapt to bone fixation on different surfaces and ensure sufficient contact area and fixation strength. The screw rod is hollow inside, and the lower bottom surface of the fastening cap 1 is also equipped with ratchet teeth, which is helpful for strengthening and stabilizing the vertebrae when fixing The effect is to prevent loosening. The tightening cap 1 added to the compression screw 3 of the lumbar vertebral arch rupture, the lower end of the tightening cap 1 is set in an umbrella shape that expands outwards, which expands t...

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Abstract

The invention discloses a lumbar spondyloschisis forcing screw, comprising a fastening cap and a screw. The head of the screw is defined within a fastening structure part to form movable connection. The screw is a self-tapping screw, wherein the inner part of the self-tapping screw is hollow; and the bottom surface of the fastening cap is provided with ratchets. The ratchets of the fastening cap are arranged in a ring shape, namely arranged in two rows of an inner ring and an outer ring. In the inner ring or the outer ring, two ratchets in one row is a group, the outer ring and the inner ring ratchets are mutually aligned, which is characterized in that the outer ring ratchet is arranged in a trapezoidal shape, and the inner ring ratchet is arranged in a trigonal taper shape. The invention also discloses application of the lumbar spondyloschisis forcing screw. The lumbar spondyloschisis forcing screw has simple integral structure and low manufacture cost.

Description

technical field [0001] The invention relates to a lumbar spondylolisthesis compression screw for hospital orthopedic surgery and the application of the screw, which belongs to the field of medical instruments. Background technique [0002] The increasingly developed medical technology in today's world has successfully solved a large number of difficult and miscellaneous diseases that were difficult to cure in the past, but at the same time, changing diseases are also emerging with the upgrading of technology, so how to improve the treatment effect is placed on the majority of scientific researchers. before. [0003] Chinese invention patent 02157300.X discloses a pier bridge type pedicle system, which is composed of several orthopedic rods, cross bridges and multiple pedicle screws. The orthopedic rods are cylindrical rods, and the cross bridges are flat square cylinders. The pedicle screw includes a screw rod, the lower body of the screw rod is provided with external threa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/86
Inventor 王德春吕成昱马进峰李桂芝王亭郑修军西永明陈晓亮邹云雯陈伯华胡有谷
Owner 王德春