CN209884432U - Silicon nitride ceramic interbody fusion cage - Google Patents

Abstract

The utility model discloses a silicon nitride pottery interbody fusion cage, including rectangular shape body, the corresponding face of two parallels of body is equipped with the pawl structure, and the one end of pawl structure place face is equipped with the instrument draw-in groove, and the connection terminal surface of instrument draw-in groove is equipped with the propulsion hole, is equipped with the through hole on the body face of perpendicular to pawl structure place face, pawl structure tip is a plurality of R angles, the propulsion hole is 8 font structures. The utility model discloses the installation is rapid, convenient, safe in utilization, and the service life limit is long, and is also more convenient when damaging to change.

Description

Silicon nitride ceramic interbody fusion cage

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to silicon nitride ceramic interbody fusion cage.

Background

With the increase of age and the rise of the incidence rate of the intervertebral, the best method is the operation treatment at present, and the operation method is mainly to insert the intervertebral fusion device between the lumbar vertebrae, thereby greatly improving the life quality of the patient. For years, metal is adopted as the interbody fusion cage, and the success rate is very high. But the compatibility of human body and metal is poor, after abrasion, sequela is brought, the metal has plasticity, the stress absorption capacity is strong, the acute angle of the pawl is more, and after installation, certain oppressibility exists on the surrounding tissues. Aiming at the problems of the metallic interbody fusion cage, Chinese patent application 201310589557.9 discloses the interbody fusion cage, which adopts polyether-ether-ketone resin as raw material, thereby avoiding the problem of poor compatibility between human body and metal, but bringing new problems, the design adopts polyether-ether-ketone resin as raw material, the hardness of the polyether-ether-ketone resin is weaker than that of the metal, but the pushing hole is not improved, the traditional pushing hole is of a single-hole thread structure, if the material with low hardness is adopted, the possibility of thread fracture exists, and the possibility of loosening exists between the pushing hole and the pushing rod after long-time use; in addition, one end of the tool clamping groove in the patent is in a sharp right-angle structure, and the inverted teeth are also in a sharp acute-angle structure, so that the possibility that the interbody fusion cage presses the surrounding human tissues still exists in the long-term use.

Disclosure of Invention

The purpose of the invention is as follows: an object of the utility model is to provide a silicon nitride pottery interbody fusion cage to prior art not enough.

The technical scheme is as follows: in order to achieve the above object, the present invention is specifically completed as follows: the utility model provides a silicon nitride pottery interbody fusion cage, includes rectangular shape body, the corresponding face of two parallels of body is equipped with the pawl structure, and the one end of pawl structure place face is equipped with the instrument draw-in groove, and the connection terminal surface of instrument draw-in groove is equipped with the propulsion hole, is equipped with the through hole on the body face of perpendicular to pawl structure place face, pawl structure tip is a plurality of R angles, the propulsion hole is 8 font structures.

And the four corners of the tool clamping groove are all R corners.

The pushing hole is of an 8-shaped structure, and the joint of the two circular rings is a section of circular arc.

Wherein, pawl structure all is equipped with pawl structure on pawl structure place face both sides.

Wherein, the body material is a silicon nitride material.

Wherein, the junction of the inverted tooth structure and the surface thereof is an R angle.

Has the advantages that: compared with the prior art, the utility model, have following advantage:

(1) the utility model adopts the R-horn-shaped inverted tooth structure, thereby avoiding the possibility that the inverted tooth structure is too sharp and oppresses the surrounding human tissues after long-time use;

(2) the utility model adopts the double-hole splayed design, can move and control in the six directions during installation, has no acute angle, is safe and reliable, and only needs to be plugged into a splayed rod during installation and is fixed by expansion in the belt;

(3) the connection part of the inverted tooth structure and the plane where the inverted tooth structure is located adopts an R-angle design, so that the inverted tooth structure and the plane where the inverted tooth structure is located are prevented from having pressure difference after being stressed when in use, and the structure is prevented from being broken or abraded;

(4) the utility model designs the dead angle of the tool clamping groove into an R angle, which prevents the possibility of oppressing the surrounding human tissues after long-time use;

(5) the utility model has good compatibility with human body, higher hardness and difficult fracture due to the traditional metal material and resin material;

(6) the utility model discloses the installation is rapid, convenient, safe in utilization, and the service life limit is long, and is also more convenient when damaging to change.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of a conventional intervertebral cage.

Detailed Description

Example 1:

the silicon nitride ceramic interbody fusion cage shown in fig. 1 comprises a strip-shaped body 1, two parallel corresponding surfaces of the body 1 are provided with inverted tooth structures 11, one end of the surface where the inverted tooth structures 11 are located is provided with a tool clamping groove 12, the connecting end surface of the tool clamping groove 12 is provided with a pushing hole 13, and a through hole 14 is arranged on the body surface of the surface where the inverted tooth structures 11 are located, wherein the end part of the inverted tooth structures 11 is provided with a plurality of R corners, the pushing hole 13 is of a 8-shaped structure, and the body is made of silicon nitride.

Example 2:

referring to example 1, the four corners of the tool pocket 12 are all at the R-corner.

Example 3:

referring to example 1, the propulsion hole has a figure 8 structure, and the joint of two circular rings is a section of circular arc.

Example 4:

referring to embodiment 1, the two sides of the surface where the inverted tooth structures are located are provided with inverted tooth structures.

Example 5:

referring to example 1, the junction of the inverted tooth structure and the surface where the inverted tooth structure is located is an angle R.

Claims (6)

1. The utility model provides a silicon nitride pottery interbody fusion cage, includes rectangular shape body (1), the corresponding face of two parallels of body (1) is equipped with pawl structure (11), and the one end of pawl structure (11) place face is equipped with instrument draw-in groove (12), and the connection terminal surface of instrument draw-in groove (12) is equipped with propulsion hole (13), is equipped with through hole (14) on the body face of perpendicular to pawl structure (11) place face, its characterized in that, pawl structure (11) tip is a plurality of R angles, propulsion hole (13) are 8 font structures.

2. The silicon nitride ceramic interbody fusion cage of claim 1, wherein the tool slot (12) has an R-angle at each of its four corners.

3. The silicon nitride ceramic interbody fusion cage of claim 1, wherein the pushing hole has a figure-8 configuration, and a connecting portion of two circular rings is a circular arc.

4. The silicon nitride ceramic interbody fusion cage of claim 1, wherein the pawl structures are disposed on both sides of the surface thereof.

5. The silicon nitride ceramic interbody fusion cage of claim 1, wherein the body material is a silicon nitride material.

6. The silicon nitride ceramic interbody fusion cage of claim 1, wherein the junction of the inverted tooth structure and the surface thereof is an R-angle.

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