CN2524700Y

CN2524700Y - Spine dilation reset inner fixer

Info

Publication number: CN2524700Y
Application number: CN 00261422
Authority: CN
Inventors: 王坤正; 魏美钢
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-21
Filing date: 2000-12-21
Publication date: 2002-12-11
Anticipated expiration: 2010-12-21

Abstract

The utility model relates to a back passage spine dilation replacement inner fixing device used in the unstable treatment of spine caused by the fracture, dislocation and degeneration of spine and tumor excision; if vertebral arch root screw composite is adopted, lengthwise connecting rod structure which is dilated with a positive thread and a negative thread can be depended; the angle between the ends of rotary sleeves on the two ends of the utility model and the lengthwise axle of the lengthwise connecting rod is 6 DEG-12DEG; a bolt hole through which a replacement pushing rod or the vertebral arch root screw passes is provided on the center of a connecting bar in the center of the utility model. The utility model can be lengthwise dilated, resume the physiologic curvature and also implement the translation replacement of sagittal surface.

Description

Spinal column distraction reduction inner fixer

The present invention relates to a kind of internal fixation device that is applied to the spine disorders treatment, be applicable to the fixed treatments of unstable spine such as spinal fracture, dislocation.

At present in the way of escape of treatment lumbar-thoracic spine spinal cord injury etc. in the solid apparatus, Steffee, Roy-camille steel plate etc. only has fixation, vertically distraction reduction; Though apparatuses such as Dick, CD, RF, AF can vertically strut, but complicated operation, operating time is long, can not damage forward and backward translation of sections or pushing tow reset response, breast waist section spinal fracture not only needs vertically to strut when resetting, also need a sagittal translation strength forward or backward, the effect of power was reverse when the result of two power compound actions just was similar to the human vertebra damage, and reset response is good.

The purpose of this utility model is at above-mentioned situation, a kind of internal fixation of spine apparatus that develops, it can accurately recover the anteflexion radian of spinal column physiology, can conveniently carry out vertical distraction reduction, the strength that resets of the front and back translation on the vertebral body sagittal plane that can also be reset.

The purpose of this utility model is achieved in that upper and lower rotation set two ends and longitudinal central axis line have 6 °-12 ° to become the angle, can produce 12 ° of-24 ° of different vertical open-angles after the apparatus assembling, be suitable for the planar anteflexion radian of the different vertebral bodys of T12-S1, meet the anatomical parameters of human body; Utilize rotatable intermediate connecting rod simple rotation operation to reach the effect that vertically struts then, the interstitial hole that utilizes intermediate connecting rod at last gives front and back translation on the sagittal plane strength that resets by reset push rod or pedicle screw, so just can produce 3 strength that reset.

Owing to adopt above-mentioned design, make the recovery physiologic radian, vertically resetting resets to engage with sagittal translation is one, and reset response is certain, simple to operate, operating time short, and the unstable spine or the deformity that cause for spinal fracture, slippage, tumor etc. provide a good medical treatment to select.

Below in conjunction with accompanying drawing this utility model is further specified:

Among the figure 1, go up rotation set, 2, intermediate connecting rod, 3, rotation set down, 4, pedicle screw, 5, the reset push rod or the pedicle screw that resets, 6, the push rod stop nut that resets, 7, pedicle screw.

As shown in drawings, sizeable medical metal material such as rustless steel, titanium alloy etc. have been processed into right-and-left threaded two rotation sets on lathe, processing simultaneously and the corresponding to connecting rod of outstanding cover internal diameter, connecting rod also is positive left-hand thread.The connecting rod mid portion is square and processes a hole.With with the pedicle screw of materials processing suitable diameter and the push rod that resets.Positive left-hand thread rotation set and connection rod set are dressed up expansible vertical pitman, pedicle screw is implanted in the last hypocentrum pedicle of vertebral arch of damage vertebral body, connect with vertical pitman, can strut operation then, reset push rod or pedicle screw of assembling at last carries out sagittal reset operation.

Claims

1, a kind of way of escape spinal column distraction reduction device decided at the higher level but not officially announced, adopt the compound expansible vertical pitman of pedicle screw to constitute, it is characterized in that: vertically pitman is made up of upper and lower rotation set and intermediate connecting rod, and respectively there is a tabular fixing hole that becomes 6 ° of-12 ° of angles with the pitman longitudinal axis at upper and lower rotation set two ends.

2, spinal column distraction reduction inner fixer according to claim 1 is characterized in that the connecting rod central part of vertical pitman has a screw hole, can be by the vertebra bar or the pedicle screw that resets of resetting.