Lifting locking type polyaxial pedicle screw

A pedicle screw and locking technology, applied in the field of medical devices, can solve the problems of insufficient stability and difficult adjustment of titanium rods, and achieve the effects of simple and convenient repeated adjustment, stable locking process and large contact area

Inactive Publication Date: 2017-09-15
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a lifting and locking universal pedicle screw, which overcomes the lack of stability of the existing universal pedicle screw when fixing titanium rods. problem, and at the same time solve the technical problem that the current titanium rod is difficult to adjust

Method used

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  • Lifting locking type polyaxial pedicle screw
  • Lifting locking type polyaxial pedicle screw
  • Lifting locking type polyaxial pedicle screw

Examples

Experimental program
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Effect test

Embodiment

[0041] Follow the above technical solutions, such as Figure 1 to Figure 7 As shown, this embodiment provides a lifting and locking type universal pedicle screw, which includes a universal pedicle screw body 1, and the universal pedicle screw body 1 includes a screw seat 2 The screw head 3 of the screw seat 2 is a tubular structure, the inner wall of the opening at one end of the screw seat 2 is provided with a convex rib 2-1, and the side wall of the other end of the screw seat 2 is provided with two symmetrical The arc-shaped opening 2-2, the arc of the arc-shaped opening 2-2 is greater than 180°, and the bottom of the arc-shaped opening 2-2 is provided with a deformation shrinkage joint 2-3;

[0042] The outer contour of the screw seat 2 is tapered and the top outer diameter of the screw seat 2 is larger than the bottom outer diameter. The outer wall of the screw seat 2 is provided with parallel initial fastening grooves in the circumferential direction from bottom to top. 4....

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Abstract

The invention provides a lifting and locking universal pedicle screw, which includes a screw head installed in a screw seat, a rib is provided on the inner wall of the opening at one end of the screw seat, and a rib at the other end of the screw seat There are two symmetrical arc-shaped openings on the side wall, and the bottom of the arc-shaped opening is provided with a deformation contraction joint; the outer wall of the screw seat is provided with a three-stage fastening groove, and the outer part of the screw seat is covered with a fastening seat, which is tight. The inner edge of the open top of the fixed seat is provided with a fastening clip that can cooperate with the three-stage fastening groove. When the fastening seat moves to the top of the screw seat, the fastening clip contacts the outer wall of the screw seat to make the screw seat squeeze and deform to lock Titanium rods mounted in screw sockets. The invention makes it simple and convenient to repeatedly adjust the titanium rod in the process of fixing the titanium rod, and the final locking and fastening state of the titanium rod is also more stable after repeated adjustments. The arc-shaped opening makes the contact area between the screw seat and the titanium rod larger, and the locking is tighter.

Description

Technical field [0001] The invention belongs to the field of medical equipment, and relates to a screw used in orthopedics, in particular to a universal pedicle screw that does not require a tail cap and can stably fix a titanium rod through a lifting locking mechanism. Background technique [0002] Spinal internal fixation surgery is currently one of the most commonly used methods for clinical treatment of spinal diseases. Pedicle screws are an important part of the spine internal fixation system. Three-column fixation by implanting the vertebral body is a prerequisite for achieving the stability of the entire spine internal fixation system to achieve clinical treatment effects. At present, common pedicle screws can be divided into two categories according to whether the screw head can rotate: directional pedicle screws and universal pedicle screws. Compared with directional pedicle screws, universal pedicle screws have the advantages of simple clinical operation and strong app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61B17/86
CPCA61B17/7002A61B17/7005A61B17/7064A61B17/7074A61B17/8615A61B17/862A61B2017/564
Inventor 吴子祥雷伟冯亚非刘趁心
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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