CN2860380Y

CN2860380Y - Intracervicales rear fixer

Info

Publication number: CN2860380Y
Application number: CN 200520048123
Authority: CN
Inventors: 周许辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-29
Filing date: 2005-12-29
Publication date: 2007-01-24
Anticipated expiration: 2015-12-29

Abstract

The utility model relates to the field of medical device technology. The invention is a fixing screw of the posterior cervical vertebra. The utility model is characterized in that smooth screw threads 2 are arranged in the tilted surface of the head of the screw 1, the bottom of which is provided with a cylinder section (4), which has a hole (3) running through its diameter. The utility model has a novel, simple structure comparing with current technology. The thread can run through the holes after stitching and tie a knot, and the thread can run wrapping the screw threads when the screw is screwed down toward the lateral cervical mass instead of gliding along the surface of the head of the screw. So the utility model can fix the posterior structure of the vertebra to the required position by frapping the thread when screwing to keep good effect of reducing the pressure. The device makes a high success rate of the operation and reduces the relapse rate of laminoplasty narrowness so that the patients can recover earlier. The invention is worthwhile to promote its application.

Description

A kind of posterior cervical internal fixation screw

[technical field]

This utility model relates to technical field of medical instruments, is a kind of posterior cervical internal fixation screw.

[background technology]

Patient is doing cervical vertebra vertebral plate one-sided when operation of opening the door, in decompression and enlarge the volumetrical stability that has prevented the odd-shaped generation of cervical vertebra recurvation simultaneously, kept spinal column of cervical spinal canal.The method of using is the vertebral plate spinous process to be sewn to close on muscle and the articular process at present.But because sutured is insecure, vertebra often takes place after structure come back to preoperative position, form spinal canal stenosis once more, and cause operative failure, thereby bring very big misery, even can add heavy patient's the state of an illness to patient.

[summary of the invention]

The purpose of this utility model is exactly will solve above-mentioned deficiency and a kind of posterior cervical internal fixation screw is provided.After making the one-sided operation of opening the door of cervical vertebra vertebral plate, structure is securely fixed on the internal fixation screw by silk thread behind the vertebra, keeps its stability, keeps good effect of easing stress, reduces the relapse rate of spinal canal stenosis.

For achieving the above object, the utility model proposes a kind of posterior cervical internal fixation screw, it is characterized in that: the screw thread 2 that has smooth no corner angle on the oblique side surface of screw head 1, screw head 1 lower end is equipped with one section cylindrical section 4, has a circular hole (3) that runs through cylindrical section (4) diameter on the cylindrical section (4); Screw head (1) upper surface has hex slot 6; This utility model employing rustless steel or pure titanium or titanium alloy or absorbable biological material are made in addition.

This utility model is compared with prior art, novel structure, simple, and the silk thread after the stitching can pass circular hole, the knotting on the screw, walks when screw silk thread when cervical lateral mass is tightened just being twined screw thread, and can not slide on the screw head surface.Therefore when tightening screw, tighten up silk thread, sound construction ground behind the vertebra has been fixed in needed position, kept good effect of easing stress, the success rate of operation height, the relapse rate of minimizing spinal canal stenosis, patient more can early recovery, is worthy of popularization.

[description of drawings]

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is user mode figure of the present utility model.

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4,1 is head, and 2 is screw thread, and 3 is circular hole, and 4 is cylindrical section, and 5 is screw thread, and 6 is hex slot, 7 screws, and 8 is silk thread.

[specific embodiment]

Referring to Fig. 1, have smooth on the oblique side surface of screw head 1 and do not have the screw thread 2 of corner angle, screw head 1 lower end is equipped with one section cylindrical section 4, has a circular hole (3) that runs through cylindrical section (4) diameter on the cylindrical section (4), and screw head (1) upper surface has hex slot 6.This technology concerning those skilled in the art still more clearly.

Claims

1. posterior cervical internal fixation screw, it is characterized in that: have screw thread (2) on the oblique side surface of screw head (1), screw head (1) lower end is equipped with one section cylindrical section (4), has circular hole (3) on the cylindrical section (4).

2. a kind of posterior cervical internal fixation screw according to claim 1 is characterized in that screw head (1) upper surface has hex slot (6).

3. a kind of posterior cervical internal fixation screw according to claim 1 is characterized in that described screw adopts rustless steel or pure titanium or titanium alloy or absorbable biological material to make.