CN201365968Y

CN201365968Y - Internal screw rod fixation device for pedicles of cervical and thoracic vertebral arches

Info

Publication number: CN201365968Y
Application number: CNU2009200636651U
Authority: CN
Inventors: 雷村
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-18
Filing date: 2009-03-18
Publication date: 2009-12-23
Anticipated expiration: 2019-03-18

Abstract

The utility model discloses an internal screw rod fixation device for pedicles of cervical and thoracic vertebral arches, which comprises a fixing rod, a retaining screw for the pedicle of a thoracic vertebral arch, and a retaining screw for the pedicle of a cervical vertebral arch, wherein the screw end bayonets of the two retaining screws are matched with the fixing rod. The internal screw rod fixation device is suitable for the anatomical characteristics of the cervical and thoracic vertebras, and can eliminate the phenomenon of stress concentration. Besides, the utility model has simple processing and manufacture, low cost as well as easy popularization and application.

Description

Neck breast section pedicle screw rod inner fixing device

Technical field

This utility model relates to a kind of pedicle screw rod inner fixing device, particularly neck breast section pedicle screw rod inner fixing device.

Background technology

The general thoracic pedicle screw rod inner fixing device that uses behind neck breast section posterior approach clinically at present, perhaps pedicle for cervical vertebra arch screw rod inner fixing device also not have to use the excellent inner fixing device of pedicle screw of the anatomical features that is fit to neck breast section vertebra.Adopt thoracic pedicle screw rod inner fixing device, the bigger thoracic pedicle screw that can use anatomical features with it not to be inconsistent at less pedicle for cervical vertebra arch place; Adopt pedicle for cervical vertebra arch screw rod inner fixing device, can use less hold-down bars at bigger thoracic vertebral pedicle place; More than two kinds of situations cause internal fixation loosening easily, even cause fracture.Chinese patent 20072006203.6 discloses a kind of neck breast section pedicle screw rod and has mixed internal fixation system, has adopted neck end and the waney hold-down bars of breast end to solve the problems referred to above.Do not concentrate but form hold-down bars stress easily, cause fracture.Although can increase its difficulty of processing setting between waney hold-down bars between mild transition region, can improve manufacturing cost and patient's financial burden simultaneously, apply thereby limit it.

Summary of the invention

The purpose of this utility model provides a kind of neck breast section pedicle screw rod inner fixing device, can be fit to the anatomical features of neck breast section vertebra, can not produce not concentration phenomenon of stress again, and can not improve manufacturing cost.

In order to achieve the above object, the technical solution of the utility model is, comprise hold-down bars, thoracic vertebral pedicle hold-down screw, pedicle for cervical vertebra arch hold-down screw, described thoracic vertebral pedicle hold-down screw nail tail bayonet socket and pedicle for cervical vertebra arch hold-down screw nail tail bayonet socket all are complementary with hold-down bars.

Adopt technique scheme, thoracic vertebral pedicle hold-down screw and pedicle for cervical vertebra arch hold-down screw are fixed on the same hold-down bars.So not only can make neck breast section pedicle screw rod inner fixing device can be fit to the anatomical features of neck breast section vertebra, can not produce the stress concentration phenomenon because the hold-down bars external diameter is consistent again.This utility model processing and manufacturing is very simple, thoracic vertebral pedicle hold-down screw nail tail bayonet socket and pedicle for cervical vertebra arch hold-down screw nail tail bayonet socket and hold-down bars are complementary to get final product, accessories such as hold-down bars also can be general with existing product, so with low cost, easy to utilize.

Description of drawings

Fig. 1 is the sketch map of front of the present utility model (band nut).

Fig. 2 is the sketch map of of the present utility model overlooking (not with nut).

The specific embodiment

Below in conjunction with accompanying drawing, further specify this utility model.

As depicted in figs. 1 and 2, neck breast section pedicle screw rod inner fixing device of the present utility model comprises hold-down bars 1, thoracic vertebral pedicle hold-down screw 2, pedicle for cervical vertebra arch hold-down screw 3, and described thoracic vertebra hold-down screw nail tail bayonet socket 4 and cervical vertebra hold-down screw nail tail bayonet socket 5 all are complementary with hold-down bars 1.

During use, thoracic vertebral pedicle hold-down screw 2 is implanted thoracic vertebra, pedicle for cervical vertebra arch hold-down screw 3 is implanted cervical vertebra, hold-down bars 1 is installed to thoracic vertebra hold-down screw nail tail bayonet socket 4 and cervical vertebra hold-down screw nail tail bayonet socket 5 again, nut is screwed into locking separately then.This utility model is fit to the anatomical features of neck breast section vertebra, and concentration phenomenon can eliminate stress simultaneously.In addition, processing and manufacturing is very simple, and is with low cost, easy to utilize.

Claims

1, a kind of neck breast section pedicle screw rod inner fixing device, it is characterized in that, comprise hold-down bars, thoracic vertebral pedicle hold-down screw, pedicle for cervical vertebra arch hold-down screw, described thoracic vertebral pedicle hold-down screw nail tail bayonet socket and pedicle for cervical vertebra arch hold-down screw nail tail bayonet socket all are complementary with hold-down bars.