CN1158049C

CN1158049C - Intervertebral repositor

Info

Publication number: CN1158049C
Application number: CNB001002988A
Authority: CN
Inventors: 林智一
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-14
Filing date: 2000-01-14
Publication date: 2004-07-21
Anticipated expiration: 2020-01-14
Also published as: CN1305784A

Abstract

The present invention belongs to a medical appliance, particularly to an intervertebral resetting device. The present invention comprises a block body and a bone nail, wherein the block body has an upper contact surface and a lower contact surface which are both provided with a plurality of projections, and at least one of the two contact surfaces is provided with an inclined hole; the bone nail is driven into a vertebral condyle which is arranged above or below a displaced intervertebral disk and penetrates through the vertebral condyle, a displaced body or a similar device in an inclined mode, and finally the bone nail penetrates into the inclined hole of the block body. Even though the bone nails are fixed by an auxiliary fixer, the relative motion of the upper vertebral condyle and the lower vertebral condyle of the intervertebral resetting device can not be limited. The present invention can make the block body, the bone nail and the vertebral condyles combined into integration.

Description

Intervertebral reductor

Technical field

The present invention belongs to medical apparatus and instruments, particularly relates to a kind of intervertebral reductor.

Background technology

Tradition intervertebral supporter (disc spacer) the RAMPS series of products of U.S. AcroMed company for example, all therefore the soleplate of destroyed vertebral segments (endplate) not can not merge with vertebral segments.For making it can reach the fixed reset function, and prevent that the intervertebral supporter from deviating from, general all with nail, fixed bar etc. as auxiliary fixing device.Therefore use these auxiliary fixing devices, with make the intervertebral supporter up and down the relative motion of vertebral segments be restricted, and can't guarantee that the intervertebral supporter is unlikely by deviating between two vertebral segments.

Case discloses before the patent of WO9508306A1 again, be to be a simple vertebra vertebral filling block, it is fixing to rely on the pressure of vertebral segments up and down be implanted in behind the intervertebral to be suppressed fully, like this then have danger and the doubt that this filling block is deviate from former implantation intervertebral after the operation.

Summary of the invention

One of purpose of the present invention is to provide a kind of intervertebral reductor.

Another object of the present invention is to provide a kind of by the intervertebral reductor that block and nail constituted with oblique hole.

A further object of the present invention is to provide the combination that resets of a kind of intervertebral that is made of plural groups block and nail, cooperates the vertebra fixing reductor of auxiliary fixer.

Intervertebral reductor of the present invention, it comprises:

One block, its upper and lower two all is the contact surfaces with plural projection; And

One nail;

It is characterized in that: this of this block two contact surfaces one side at least have an oblique hole, and this nail is squeezed in order to vertebral segments above or below the displacement intervertebral disc, in oblique pass this vertebral segments or its and replace body after, penetrate the oblique hole of this block.

A plurality of blocks, upper and lower two of these blocks all is the contact surfaces with plural projection, at least one has an oblique hole this two contact surface;

A plural number nail; Squeeze in order to the vertebral segments above or below the displacement intervertebral disc, in the oblique oblique hole that penetrates this block after passing this vertebral segments respectively;

One auxiliary fixing device; With so that a plural number nail be combined into one.

Above-mentioned block, its shape there is no particular restriction, especially goes up contact surface and following contact surface (refer to contact with vertebral segments face), is the contact surface with projection.Said upper and lower, the front, rear, left and right of this paper are meant behind this block implant into body, are upper and lower, front, rear, left and right side according to people's upper and lower, front, rear, left and right side.Above-mentioned projection, it can be any known projection, and for example the twisted shape projection is arranged the shape projection, is preferable with row's shape projection, to constitute a plurality of horizontally-arranged shape projections parallel to each other for better.Above-mentioned contact surface is preferable with convex globoidal.So-called convex globoidal is to instigate to form small at both ends and big in the middle convex arc shaped up and down between two.Above-mentioned oblique hole, be meant back to front tiltedly go up or tiltedly under the hole.

Above-mentioned nail can be any known nail.

Above-mentioned described what is called vertebral segments above or below the displacement intervertebral disc is squeezed into, be to describe it to squeeze into direction, but not must squeeze into by vertebral segments, for example can squeeze into by other spinal fixing device or auxiliary device, behind vertebral segments or its replacement body or similar device, enter the oblique hole of this block again.

The oblique hole of above-mentioned this nail and this block, its combination can be fixed combination (for example screwing togather), also can be the combination of free-standing, example is gone into the simple oblique hole that allows nail insert block, the inner edge in the outside line of nail and the oblique hole of block and unsubstantial marriage relation.

The combination in above-mentioned this nail and this oblique hole of block is combined into preferablely with free-standing, have fine motion (micromotion) relation because of it can make block with respect to nail and vertebral segments, to promote its bone tissue growth (bone ingrowth).And because in the oblique hole of the oblique insertion block of nail, make nail and/or block can only deviate from according to the oblique hole of block oblique (but this direction be subject to its up and down vertebral segments and can not), can not laterally deviate from, therefore, even the oblique hole of nail and block there is no the essence marriage relation, still have the block of preventing and deviate from.

Above-mentioned intervertebral reductor, it also can be aided with any known auxiliary fixing device, for example by the auxiliary fixing device (referring to Fig. 4) that auxiliary fixing plate/auxiliary fixed screw is constituted, or the auxiliary fixing device (referring to Fig. 2,3) that auxiliary static line/auxilliary stator/auxiliary fixed screw is constituted.

Above-mentioned block, nail and auxiliary fixing device can use any suitable bio-compatibility material in bone surgery, for example rustless steel 316LVM, Ti-6-4, cobalt-molybdenum-nickel alloy etc.

Above-mentioned this block contains an oblique hole at least, is preferable to contain two symmetrical mutually oblique holes in opposite directions.This oblique hole can be by the inside oblique extension of any place opening of this block contact surface, but with by the nearly centre opening of this block contact surface inwardly oblique extend to preferable.

The suitable instrument of nail of the present invention makes it can pass vertebral segments, behind its substituent or the similar device, be able to penetrate the oblique hole of this block.

Intervertebral reductor of the present invention, wherein the combination in nail and the oblique hole of block is not to combine closely, and therefore, even fixed with auxiliary fixing device between nail, the intervertebral reductor relative motion between two vertebral segments up and down still can not be restricted again.In addition, because nail passes vertebral segments, therefore, can make block, nail and vertebral segments be fused into one and strengthen firm safety.

Below in conjunction with accompanying drawing and preferred embodiment technical scheme of the present invention is further described.

Description of drawings

Fig. 1 is an intervertebral reductor sketch map of the present invention.

Fig. 2 is by two blocks, the intervertebral reductor that three nail and auxiliary fixing devices are constituted.

Fig. 3 is the spinal fixation sketch map that intervertebral reductor is used for adjacent two intervertebral disc disorders shown in two picture groups 2.

Fig. 4 is the spinal fixation sketch map that intervertebral reductor of the present invention is used for single intervertebral disc disorder.

The number in the figure explanation

100. block 110,160. parallel projections 120 (170). go up (descending) contact surface

130,180. oblique hole 140. tooling holes, 200. nails

210,220,230. nail portions, 300. auxiliary fixing devices, 310. static lines

320. stator 330. hold-doun nuts

100 is block among Fig. 1,110,120 and 130 are respectively planar projection on the block, contact surface and oblique hole, 160,170 is the projection and the contact surface of block lower plane, 140 is tooling hole, and wherein projection 110 and 160 is parallel horizontally-arranged shape projection, and oblique hole 130 is not for having the oblique hole of thread.

Among Fig. 2, the same Fig. 1 of 100,110,120,130,140,160,170 definition, 180 is the oblique hole of block 100 lower planes.210,220,230 are nail, and wherein B vertebral segments 10 and 220 tail ends are all squeezed into the oblique hole of block.300 is auxiliary fixing device, and wherein 310 is static line, and 320 is stator, and 330 is fixed screw, and it is according to direction shown in graphic, makes two blocks constitute one by nail and auxiliary fixing device indirectly.

Fig. 3 fixes two groups of intervertebral disc disorder schematic perspective views for utilizing intervertebral reductor shown in two picture groups 2, number in the figure 100,300, and 310,320 and 330 all same Fig. 2, and 400 be vertebral segments.

Fig. 4 is for cooperating fixing head 340 and fixed screw 330 intervertebral reductor as auxiliary fixing device 300, the wherein same Fig. 3 of 100,200 and 400 definition.

Claims

1. intervertebral reductor, it comprises:

One nail;

2. intervertebral reductor as claimed in claim 1, wherein the contact surface of this block is a convex globoidal.

3. intervertebral reductor as claimed in claim 2, wherein the projection of this block is parallel horizontally-arranged shape projection.

4. as claim 1,2 or 3 described intervertebral reductors, wherein the upper and lower plane of this block has an oblique hole respectively.

5. intervertebral reductor as claimed in claim 1, it further comprises:

One second block, upper and lower two of this second block all is the contact surfaces with plural projection;

One second nail; And

One auxiliary fixing device;

This auxiliary fixing device wherein, with so that these nails be combined into one.

6. intervertebral reductor as claimed in claim 5, wherein the contact surface of this second block is a convex globoidal.

7. intervertebral reductor as claimed in claim 6, wherein the projection of this second block is parallel horizontally-arranged shape projection.

8. as claim 5,6 or 7 described intervertebral reductors, wherein the upper and lower plane of this second block has an oblique hole respectively.