CN2165814Y

CN2165814Y - Fixing device for spine

Info

Publication number: CN2165814Y
Application number: CN 93236902
Authority: CN
Inventors: 刘兴东
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-21
Filing date: 1993-05-21
Publication date: 1994-05-25
Anticipated expiration: 2003-05-21

Abstract

The utility model relates to a spine fixing device which comprises a fixing column of a neural arch pedicle and screw nails of the neural arch pedicle. The utility model is used for resetting and fixing the fracture and the slip of spine, and is characterized in that the fixing column of the neural arch pedicle is a semicylinder. A row of continuous arc-shaped through holes with equal diameter and distance are arranged along the middle part of a longitudinal shaft of the semicylinder. Each screw nail of the neural arch pedicle can enter each arc-shaped through hole, and the screw nail does not slide towards adjacent arc-shaped through holes. Each screw nail of the neural arch pedicle has a large diameter and thick threads, and the tail part of each screw nail of the neural arch pedicle, which is positioned in each arc-shaped through hole of the fixing column of the neural arch pedicle forms a cylinder. The length of each cylinder is the same with the depth of each arc-shaped through hole, and the diameter is a little smaller than the diameter of each arc-shaped through hole. The screw nails of the neural arch pedicle are fixedly connected with the spine through the arc-shaped through holes of the fixing column and the neural arch pedicle.

Description

Fixing device for spine

The utility model relates to the medical apparatus and instruments of spinal fixation, specifically: be used for spinal fracture, reduction of spondylolisthesis is fixed.

Existing spinal fixation apparatus is more, mainly contain apparatuses such as Ha Shi rod, Shandong Ge Shi rod, but these apparatuses shows its shortcoming and defect day by day, and operation wound is big, fixedly owes firmly, and complication is more, uses problems such as inconvenience.

The purpose of this utility model provides little, the fixation of a kind of operation wound, spinal fixation apparatus easy to use.

For realizing the purpose of this utility model, technical solution is: this utility model provides spinal fixation system to be made up of fixation of pedicle post and pedicle screw, it is characterized in that: the fixation of pedicle post is half Cylinder, along half garden post center longitudinal axis, one row's equal diameters is set, equidistant continuous arc-shaped through-hole, all can enter pedicle screw and screw in each arc-shaped through-hole and not slide to contiguous arc-shaped through-hole, pedicle screw is thick diameter, coarse thread screw, the part of pedicle screw in vertebral arch fixed leg arc-shaped through-hole is Cylinder, Cylinder length is identical with the arc-shaped through-hole degree of depth, and the Cylinder diameter is more smaller than arc-shaped through-hole diameter.

A kind of spinal fixation system that this utility model provides compares with existing technology, and the advantage that has has:

［ 1 ］ novel structure: the fixation of pedicle post both had been different from the garden cylindricality of Ha Shi rod, Shandong Ge Shi rod, the platy structure that also is different from the steef steel plate, half garden cylindricality for uniqueness, such shape just in time conforms to the formed half garden connected in star of transverse process with the superior articular process of pedicle of vertebral arch place, the fixation of pedicle post is by in groove, coincide with the spinal column physiology and appearance, contact widely, support firmly.

(2) compare with Ha Shi rod, Shandong Ge Shi rod: the Harrington rod operation wound is big, and only also there is more complication such as breaking off relations, fracture in the rear pillar of spinal fixation; Shandong Ge Shi rod operation wound is big, the also rear pillar of spinal fixation only, and enter canalis spinalis, have the danger of Spinal Cord nerve, use this utility model device, operation wound is little, and pedicle fixed vertebral body before, during and after three posts, thereby firmly and complication few.

(3) compare with the DiCK holder: the DiCK holder is short and small, and is not too suitable to multiple spinal fracture or slippage.This utility model device length thickness can be selected, and also is suitable for applied range for multiple spine folding or slippage.

(4) compare with the steef steel plate: the steef steel plate hole is apart from big, often to prepare many tools steel plate to select for use according to the state of an illness, so it is very inconvenient, the steef steel plate central authorities of improvement are groove, screw can slide in groove, solved the pitch-row problem, but antitorque commentaries on classics anti-fractures, antiskid is moving, loosing prevention power reduces, and is also undesirable, the fixation of pedicle post that this device provides is half garden column structure, antitorque commentaries on classics, the performance that fractures are stronger than platy structure, and the continuous arc hole at fixed leg center makes the screw distance very little, regulates meticulous, easy to use, adapt to the requirement of pedicle of vertebral arch apart from different patients.Fixation of pedicle post arcuate socket has certain depth, and the screw afterbody is tightly inserted wherein, make screw can not slide, be difficult for loosening, can also be in the arc hole bone grafting, therefore more meet the form and the mechanics requirement of spinal column, the bright benefit of medical value and economic benefit than steef steel plate.

The utility model is described in further detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is the structural representation of the vertebral arch fixed leg of spinal fixation system

Accompanying drawing 2 is the pedicle screw sketch map of spinal fixation system

In accompanying drawing 1 and accompanying drawing 2: ［ 1 ］ be fixation of pedicle post of the present utility model, be half Cylinder ［ 2 ］ for the continuous arc-shaped through-hole ［ 3 ］ at fixation of pedicle post center be Cylinder for the part that screw thread ［ 5 ］ the pedicle screw afterbody of pedicle screw of the present utility model ［ 4 ］ pedicle screw is positioned at fixation of pedicle post arc-shaped through-hole.

The spinal fixation system that this utility model provides, its using method is: select the fixation of pedicle post of suitable length, thickness a pair of on demand (two), and it is crooked a little to press the spinal column physiology and appearance, at pedicle of vertebral arch center, the fixed vertebral body of needs both sides, downward with the 4mm drill bit, about 10 ° direction that tilts to the inside about 4～5cm that holes is dark, puts both sides fixation of pedicle post, by boring direction the arc-shaped through-hole of pedicle screw by the fixation of pedicle post is screwed in spinal column and screw to get final product.

Claims

1, a kind of spinal fixation system: form by fixation of pedicle post and pedicle screw, it is characterized in that: the fixation of pedicle post is half Cylinder, one row's equal diameters is set in the middle of the longitudinal axis of half Cylinder, equidistant continuous arc-shaped through-hole, all can enter pedicle screw and screw in each arc-shaped through-hole and not slide to contiguous arc-shaped through-hole, pedicle screw pedicle fixed leg arc-shaped through-hole is connected with spinal fixation.

2, according to claims 1 described spinal fixation system: it is characterized in that: pedicle screw is thick diameter, coarse-pitch thread, the part that the afterbody of pedicle screw is positioned at arc-shaped through-hole is a Cylinder, Cylinder length is identical with the fixation of pedicle post arc-shaped through-hole degree of depth, and the Cylinder diameter is more smaller than arc-shaped through-hole diameter.