CN112402068A

CN112402068A - an intervertebral fusion device

Info

Publication number: CN112402068A
Application number: CN201910782960.0A
Authority: CN
Inventors: 文晓宇; 徐凯; 张靖; 孙陆; 刘也
Original assignee: Beijing Zhisu Health Technology Co ltd
Current assignee: Beijing Zhisu Health Technology Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2021-02-26

Abstract

The invention discloses an intervertebral cage, comprising a cage body, wherein: the cage body is an annular structure with an upper surface and a lower surface passing through; the rear end of the cage supporting body has an instrument hole; The front end of the cage body is an arc-shaped arc head, and the head of the arc head and the two opposite sides of the cage body both have a plurality of through holes communicating with the outside world. In the present application, the cage body is set to a pore structure, and the head of the front end of the cage body is also set to a pore structure to increase the porosity, promote the growth of bone into the cage and reduce the elastic modulus.

Description

Intervertebral fusion cage

Technical Field

The invention relates to the technical field of medical instruments, in particular to an interbody fusion cage.

Background

The interbody fusion cage is composed of an interbody fusion cage and accessory screws of the interbody fusion cage. The product is suitable for spinal interbody fusion. The interbody fusion cage is one of main implants for realizing the fusion of adjacent intervertebral spaces of the vertebral column as an orthopedic implantable medical instrument, has the functions of supporting, equally dividing load and the like, can better recover the height of the intervertebral spaces and the physiological curvature of the vertebral column, and directly influences the effect of the adjacent vertebral body osseous fusion by the safety and the effectiveness of the interbody fusion cage.

The existing intervertebral fusion device is mostly composed of a solid frame structure and a through hole structure. The entity supports and adopts entity axial bearing surface or side support column more, can occupy the fusion cage volume greatly like this, leads to the fusion cage porosity undersize, influences the bone fusion effect.

Therefore, the technical problem to be solved by those skilled in the art is how to provide an intervertebral fusion cage to improve the void ratio and the bone fusion effect.

Disclosure of Invention

In view of the above, the present invention is directed to an intervertebral fusion cage with improved porosity to improve bone fusion effect.

In order to achieve the purpose, the invention provides the following technical scheme:

an intervertebral cage comprising a cage body, wherein:

the fusion cage is characterized in that the fusion cage body is of an annular structure with a through upper surface and a through lower surface, an instrument hole is formed in the rear end of the fusion cage supporting body, the front end of the fusion cage body is an arc-shaped head, and the head of the arc-shaped head and two opposite side surfaces of the fusion cage body are provided with a plurality of through holes communicated with the outside.

Preferably, in the above intervertebral fusion cage, the upper surface and the lower surface of the cage body are parallel and planar, and both the upper surface and the lower surface are provided with protrusions, and the protrusions incline from the front end to the rear end.

Preferably, in the above intervertebral fusion cage, the cage body has a rectangular parallelepiped structure, and the projections of the upper surface and the projections of the lower surface are arranged axisymmetrically.

Preferably, in the above-mentioned intervertebral fusion cage, the porosity of the fusion cage body is 5% to 90%, the aperture of the through-hole of the side of the fusion cage body and the aperture of the through-hole of the end face of the arc-shaped head are both 100um-1500 um.

Preferably, in the intervertebral fusion cage, the through holes on the side surface of the cage body and the through holes on the end surface of the arc-shaped head are gaps between lattice fillers.

Preferably, in the intervertebral fusion device, the instrument hole is a rectangular instrument hole.

Preferably, in the above intervertebral cage, the cage body is a titanium alloy cage.

According to the technical scheme, the cage body is set to be in the pore structure, and the front end head of the cage body is also set to be in the pore structure, so that the porosity is increased, the bone growth into the cage is promoted, and the elastic modulus is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a front view of a cage body of the intervertebral cage disclosed in an embodiment of the present invention;

FIG. 2 is a top view of a cage body of the intervertebral cage disclosed in an embodiment of the present disclosure;

FIG. 3 is a right side view of the cage body of the intervertebral cage disclosed in an embodiment of the present invention;

fig. 4 is a left side view of the cage body of the intervertebral cage disclosed in an embodiment of the present invention.

Detailed Description

In view of the above, the core of the present invention is to provide an intervertebral fusion cage to improve the void ratio and the bone fusion effect.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in figures 1-4, the invention discloses an intervertebral cage, which comprises a cage body, wherein the upper surface and the lower surface are communicated with each other to form a ring structure, and the upper surface and the lower surface are communicated with each other, namely the cage body is communicated with the lower surface from the upper surface to form a ring structure. The rear end 11 of the fusion cage body is provided with an instrument hole 14, the front end 12 of the fusion cage body is an arc-shaped head, and the head part of the arc-shaped head and two opposite side surfaces of the fusion cage body are respectively provided with a plurality of through holes communicated with the outside. The cage body is arranged to be of a pore structure in the application, and the head part 12 at the front end of the cage body is also arranged to be of a pore structure so as to increase the porosity, promote bone growth into the interbody cage and reduce the elastic modulus.

The upper surface and the lower surface of the cage body in this application are both planar and parallel, the upper surface and the lower surface are both provided with the projection 13, and the projection 13 is inclined to the rear end 11 by the front end 12 of the cage body. The upper surface and the lower surface of the interbody fusion cage body are both set to be flat, so that the interbody fusion cage can be prevented from generating bone subsidence when being placed into a body, the stress of the most fragile position of the vertebra is avoided, the interbody fusion cage is suitable for all types of vertebrae, meanwhile, the stability of the interbody fusion cage can be increased, and the lateral sliding is avoided. In addition, the protrusion 13 provided in the present application is inclined from the front end 12 of the fusion cage body to the rear end 11 of the fusion cage body to ensure that the fusion cage body is placed into the body without hindrance and to prevent horizontal slippage. The size and the spacing of the protrusions 13 can be set according to different requirements and are all within the protection range.

In a specific embodiment, the fusion cage body is a rectangular parallelepiped structure, and the protrusions 13 on the upper surface and the protrusions 13 on the lower surface are arranged axisymmetrically. The shape of the fusion cage body can be set according to needs by those skilled in the art, and the fusion cage body is set to be of a cuboid structure in the application, so that the intervertebral fusion cage can be prevented from generating bone subsidence when being placed into a human body. The arranged bulges are arranged in an axisymmetric manner, so that the balance of the fusion cage body can be ensured.

In a preferred embodiment, the porosity of the fusion cage body is 5% to 90%, and the hole diameters of the through hole on the side surface of the fusion cage body and the through hole on the end surface of the arc-shaped head are both 100um to 1500 um. In practice, the porosity and the pore diameter can be set according to different requirements and are all in a protection range.

In a further embodiment, the through holes of the side face of the fusion cage body and the through holes of the end face of the arc-shaped head are gaps between the lattice fillers. The crystal lattice replaces human bones, so that the cost is reduced, the wound can be reduced, and the method is more humanized.

In particular, the instrument hole 14 in the present application is a rectangular instrument hole, and a specific shape of the instrument hole 14 is disclosed herein, but it will be understood by those skilled in the art that the instrument hole 14 may be correspondingly sized and shaped according to the tool used in the actual operation, and all within the protection scope.

The shape and size of the through hole can be customized, and is not limited in detail. The arc head in this application is arc, can coincide with cervical vertebra articular upper and lower surface shape.

In a further embodiment, the intervertebral cage body is a titanium alloy cage. The titanium alloy fusion cage has better biocompatibility and supporting strength.

In connection with the above description, reference may be made to the following for specific parameters of the intervertebral cage:

structural pore diameter of the porous interbody fusion cage: 300-800 μm;

structural rod diameter of the porous interbody fusion cage: 100-800 μm;

porosity of porous interbody fusion cage structure: 5 to 90 percent.

Compression performance: the compression rigidity of the porous interbody fusion cage is close to the rigidity of human skeleton, so that the stress shielding effect is reduced, and the rigidity is 10000-100000N/mm.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. an intervertebral cage, comprising a cage body, characterized in that:

The cage body is an annular structure with an upper surface and a lower surface passing through, the rear end (11) of the cage supporting body has an instrument hole (14), and the front end (12) of the cage body is an arc-shaped arc The head of the arc-shaped head and the two opposite sides of the cage body both have a plurality of through holes communicating with the outside world.

2. The intervertebral cage according to claim 1, wherein the upper surface and the lower surface of the cage body are parallel and both are planes, and the upper surface and the lower surface are provided with protrusions ( 13), the protrusion (13) is inclined from the front end (12) to the rear end (11).

3. The intervertebral cage according to claim 2, characterized in that the cage body is a cuboid structure, and the protrusions (13) on the upper surface and the protrusions (13) on the lower surface are axes Symmetrical arrangement.

4 . The interbody cage according to claim 1 , wherein the porosity of the cage body is 5% to 90%, and the through holes on the side of the cage body and the The diameters of the through holes on the end face are all 100um-1500um.

5 . The interbody cage according to claim 4 , wherein the through holes on the side surface of the cage body and the through holes on the end surface of the arc head are gaps between lattice fillers. 6 .

6. The interbody cage according to claim 1, wherein the instrument hole (14) is a rectangular instrument hole.

7 . The interbody cage according to claim 1 , wherein the cage body is a titanium alloy cage. 8 .