CN2288707Y

CN2288707Y - Artificial intervertebral disc

Info

Publication number: CN2288707Y
Application number: CN97202279U
Authority: CN
Inventors: 鲁继武
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-05
Filing date: 1997-03-05
Publication date: 1998-08-26
Anticipated expiration: 2007-03-05

Abstract

The utility model discloses an artificial intervertebral disc, which is composed of a level ring, the exterior shape of which is liberal and upper and lower joint faces which are matched with the ring, and the inner part of the level ring is filled with filler. More than two punch holes are reserved under the upper and lower joint faces, and screws are fixed in the punch holes. The artificial intervertebral disc can be uniformly used by the patients which are ill with deformed and damaged fiber ring, narrowed intervertebral space, osteophyma, degenerative change and concomitant sciatic nerve pain and Lumbago and the patients of intervertebral disc slip, and therefore, the utility model can replace original intercalated disc tissue. Accordingly, the utility model has the functions of support, distortion, protection, etc.

Description

Artificial intervertebral disc

This utility model belongs to a kind of artificial joint, relates to a kind of artificial intervertebral disc.

At present, succeeded, and the method for solution has not been arranged as yet, therefore,, be difficult to cure in case intervertebral disc is impaired or pathological changes takes place for interpyramidal joint tissue for joint materials such as making hip, knee joint.

The purpose of this utility model is a kind of artificial intervertebral disc of design, and it can keep the connection up and down of intercalated disc, do not lose original support again, protect, reverse and linkage function, thus the effect that reaches treatment and cure.

For achieving the above object, this utility model is taked following design: artificial intervertebral disc by be not limited to external shape, in the horizontal annular thing of implant is housed and the joint face up and down that matches with annulus is formed, leave the perforation more than two on the described joint face up and down, the perforation internal fixation has screw.

This artificial intervertebral disc all can use for fibrous ring distortion, destruction, narrowing of intervertebral space, hyperosteogeny, degeneration and the patient and the intervertebral disc slippage patient that are attended by sciatic nerve pain and pain in the lumbar region.Therefore its alternative former intercalated disc tissue, thus play support, reverse, function such as protection.

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

Fig. 1 looks sketch map for shape and structure master of the present utility model

Fig. 2-Fig. 6 is the shape sketch map of drift bolt screw in this utility model

Fig. 7-Figure 15 is several embodiment shape sketch map of the present utility model

Figure 16 is the be complementary shape sketch map of joint face of this utility model and human intervertebral disc

To be joint face of the present utility model be the not only sketch map of sliding surface to Figure 17

As shown in Figure 1, artificial intervertebral disc is by the Without wishing external shape, in the horizontal annular thing 2 of

implant

1 and 3,4 compositions of upper and lower joint face that match with annulus are housed.Leave the perforation 5,6 more than two on the described upper and lower joint face, the perforation internal fixation has screw.Annulus 2 be a kind of rubber-like, softish, in internal structure, can rise and isolate and a kind of material of protective effect, generally can select for use Ministry of Public Health by and the silica gel material that allows to use make.

By Fig. 2-Fig. 6 as can be known, fixing effect with the drift bolt screw is: artificial intervertebral disc and human body intercalated disc upper and lower can be connected to one.This screw can be multiple shape: bar shaped as shown in Figure 2; Screw afterbody vertebra as shown in Figure 3 is pointed; Have through hole 7 on the screw nail body as shown in Figure 4; Position, screw vertebra tip as shown in Figure 5 has cell body 8; Have the groove 9 that inwardly concaves between screw nail body as shown in Figure 6.Design these different screws, purpose is: 1, improve fixed effect.2, promote the fusion of artificial intervertebral disc and human body intercalated disc.

By Fig. 7-Figure 14 as can be known, artificial intervertebral disc has been not limited to fixed external shape characteristics, and it will vary with each individual, and to the people of different figures, all ages and classes section, adopt not similar shape specification.Should be suitable for human body, will make artificial intervertebral disc can reach the motion and the support effect of original intercalated disc.Therefore in the manufacturing, no matter any model, all should with 00 ' be the center support point and the centre of twist, thereby reach the relative proper motion of this intercalated disc.For preventing annulus 2 and the mutual slippage in above and below, on the following orientation of last joint face 3, have groove shape, dihedral, camber line shape, multi-edge column-shaped or circular caulking groove 10; And also leave down camber line shape, protruded stigma shape, dihedral, circular friction road 11 on the upper position of joint face 4.Like this, not only can make content and top and bottom secure bond in the annulus, be difficult for slippage, also can ensure the proper motion of artificial intervertebral disc.

As shown in Figure 15, for strengthening the connection between artificial intervertebral disc, also can be at 11 fixing more than one spring-like elastomers 12 of caulking groove 10 and friction road.

As shown in Figure 16, for matching with the human body intervertebral, external of

joint face

3,4 is irregular up and down, and upper surface and human body intervertebral shape match.

As shown in Figure 17, for strengthening being connected of human body intervertebral and artificial intervertebral disc, external of joint face 34 can be adopted shiny surface, not only sliding surface up and down.Not only can have protruding ball, embossing, perverse lines etc. on the sliding surface.

Claims

1, a kind of artificial intervertebral disc, it is characterized in that: it by the Without wishing external shape, in the horizontal annular thing (2) of implant is housed and the upper and lower joint face (3,4) that matches with annulus is formed, leave the perforation (5,6) more than two on the upper and lower joint face, the perforation internal fixation has screw.

2, artificial intervertebral disc according to claim 1 is characterized in that: described screw can be bar shaped; It is pointed to can be screw afterbody vertebra; Can follow closely at screw and open through hole (7) on the body; Can be at the position, vertebra tip of screw fluting body (8); Can follow closely to open between body at screw and inwardly concave groove (9).

3, artificial intervertebral disc according to claim 1 is characterized in that: have groove shape, dihedral, camber line shape, multi-edge column-shaped or circular caulking groove (10) on the following orientation of described upward joint face (3); Leave the friction passage (11) of camber line shape, protruded stigma shape, dihedral, circle on the upper position of following joint face (4).

4, artificial intervertebral disc according to claim 1 is characterized in that: be fixed with more than one spring-like elastomer (12) between described caulking groove (11) and friction road (11).

5, artificial intervertebral disc according to claim 1 is characterized in that: external of described joint face (3,4) up and down is irregular, and upper surface and human body intervertebral shape match.

6, artificial intervertebral disc according to claim 1 is characterized in that: external of described up and down joint face (3,4) can adopt shiny surface, not only sliding surface.

7, artificial intervertebral disc according to claim 6 is characterized in that: can have protruding ball, embossing, perverse lines etc. on the described not only sliding surface.