CN216318230U - Metal rubber lateral lumbar interbody fusion cage - Google Patents

Abstract

The utility model belongs to the technical field of medical instruments and discloses a metal rubber lateral lumbar interbody fusion cage, which comprises a fusion cage body, wherein the fusion cage body is made of metal rubber materials and is in an oval shape, the fusion cage body is provided with various inclination angles and length models, the fusion cage body comprises a front side and a rear side, the height of the front side is higher than that of the rear side, the fusion cage body is provided with a propelling groove and a bone grafting cavity, a reinforcing grid is fixedly bonded in the bone grafting cavity, and the upper surface and the lower surface of the fusion cage body are both in a zigzag shape, and the front side wall and the rear side wall of the fusion cage body are communicated and provided with side holes; the utility model solves the problems that the lateral interbody fusion cage in the prior art can not simultaneously meet the requirements of similar elasticity modulus with cortical bone, larger end plate contact surface, capability of early bone ingrowth, short manufacturing period, suitability for clinical popularization and the like, and is suitable for spinal structure reconstruction.

Description

Metal rubber lateral lumbar interbody fusion cage

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a metal rubber lateral lumbar interbody fusion cage.

Background

The spine is the main bearing structure of the human body, has a complex structure, has the functions of loading, keeping the balance of the human body, moving and protecting the spinal cord and internal organs, and plays an extremely important role in the normal physiological activities of the human body. When the spine is unstable due to serious fracture, degenerative spine disease, infection, spine tumor and other diseases, the spine structure is usually reconstructed mainly by intervertebral fusion, and two or more adjacent vertebral bodies are connected or fused together by the operation, so that the aim of reconstructing the stability of the spine is fulfilled.

With the development of minimally invasive technology in recent years, the lateral lumbar interbody fusion technology is rapidly developed in China. The lateral lumbar interbody fusion restores the height of the intervertebral space by implanting a wide interbody fusion cage in the intervertebral space, so that the fibrous ring and the ligamentum flavum are tense, and part of the extruded nucleus pulposus is accommodated, thereby widening the intervertebral foramen and increasing the volume of the vertebral canal. Compared with posterior intervertebral fusion, the lateral intervertebral fusion does not need to enter the vertebral canal, reduces the disturbance of nerves and the formation of epidural scar tissues, does not damage the muscles at the rear, keeps a complete posterior column, and has small damage to the stability of the spinal column.

The existing fusion cage comprises a titanium alloy fusion cage, a polyether-ether-ketone fusion cage and a 3D printing fusion cage. The titanium alloy interbody fusion cage has high stability and good effects of maintaining the interbody height and physiological sequence, but the titanium alloy metal elastic coefficient is too large to exceed the elastic coefficient of cortical bone, so that stress shielding is generated, and the fusion cage is easy to sink (the sink of the fusion cage means that the fusion cage sinks into end plates or spongy bone of a vertebral body after the spinal interbody fusion cage, so that the interbody height is lost); the PEEK fusion cage has excellent mechanical property, fatigue resistance, chemical corrosion resistance, creep resistance, radiation resistance, thermal stability and water resistance, the elastic coefficient of the PEEK fusion cage is close to that of cortical bone, but the PEEK material is biologically inert and does not have osteogenic activity, and smooth bone trabeculae on the surface can not grow into the fusion cage, so that a large gap is designed in the middle of all the PEEK fusion cages for filling autologous bone or bone substitute materials, a bone bridge can be formed only by filling the autologous bone or bone substitute materials into the gap after the fusion cage is stabilized, the process needs 1 to 2 years, the waiting time is long, the contact area of end plates is reduced due to the existence of the large gap, the axial load distribution becomes uneven, the fusion cage is often caused to sink, the intervertebral fusion cage is often trapped between the vertebrae to form a false joint without real bone fusion, and local aseptic inflammation and osteolysis can be generated after the degradation of the fusion cage, clinical applications are limited; the 3D prints the micropore structure that the integration ware can control the product in the printing process, can make the interior plant that is applicable to different diseases fast, with the micropore structure reduction exist in the metal interior plant solid part, can reduce the elastic modulus of the interior plant of metal, make it as far as possible to be close to the elastic modulus of human sclerotin, the stress that has reduced because of elastic modulus mismatch leads to shelters from, and promote metal implant and sclerotin to fuse, improve the clinical curative effect after the operation, but 3D prints the cost than higher, it is long consuming time to print, the prosthesis can not be changed at will in the art, there is certain restriction in the flexibility of use, and still there is not unified at present, the standard, the prosthesis intensity through 3D printing technology preparation is difficult to obtain guaranteeing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a metal rubber lateral lumbar interbody fusion cage, and aims to solve the problems that the lateral interbody fusion cage in the prior art cannot simultaneously meet the requirements of similar elasticity modulus of cortical bone, larger end plate contact surface, capability of early bone ingrowth, short manufacturing period, suitability for clinical popularization and the like.

In order to achieve the above purpose, the utility model provides the following technical scheme:

the basic technical scheme provided by the utility model is as follows: metal rubber side way lumbar vertebrae interbody fusion cage, including the fusion cage body, the fusion cage body is made by metal rubber material, the fusion cage body includes front side and rear side, the height of front side is higher than the height of rear side, the propulsion groove has been seted up to the lateral wall of fusion cage body, the fusion cage body is oval, the bone grafting chamber has been seted up at the middle part of fusion cage body.

The principle of the basic technical scheme is as follows: the metal rubber is a homogeneous elastic porous substance, and is formed by utilizing a corresponding technological means to orderly arrange a certain mass of stretched and spiral metal wires in a stamping (or rolling) die and using a cold stamping method, so that the metal rubber not only has good fatigue resistance and corrosion resistance of the metal, but also has elasticity and damping performance similar to rubber materials, and is a novel homogeneous elastic porous material.

The beneficial effects of the basic technical scheme are as follows: the interbody fusion cage made of metal rubber is formed by adopting a cold stamping method, the manufacturing period is short, the efficiency is high, the economy is good, the adjustment is convenient, the interbody fusion cage has good fatigue resistance and corrosion resistance, and enough elasticity and damping performance, the requirements of the elastic modulus of the interbody fusion cage and the contact surface of an end plate with a large area can be met, the interbody fusion cage is filled with self-transplanted bones or transplanted bone substitutes to implant early-rise bones, the practicability is strong, and the clinical popularization is easy to realize.

Preferably, both the upper and lower surfaces of the cage body are serrated.

Through the arrangement, the friction coefficient between the fusion cage and the intervertebral space is increased, and the sliding of the fusion cage is avoided.

Preferably, the fusion cage body is further connected with a reinforcing grid, and the reinforcing grid is arranged on the inner side of the bone grafting cavity.

Through the arrangement, the reinforcing grids are connected in the bone grafting cavity, so that the connection strength between the self-grafting bone filling or the bone grafting substitutes in the bone grafting cavity is improved, and the use performance of the interbody fusion cage is further improved.

Preferably, the side wall of the fusion cage body is provided with a side hole.

Through the arrangement, the elasticity of the fusion cage body is improved.

Preferably, the fusion cage body is provided with a plurality of inclination angle models, and the fusion cage body is provided with a plurality of length models.

Through the arrangement, different fusion device body models are selected according to different crowd requirements and patient conditions, and the application range is expanded.

Preferably, the length of the cage body is 50mm, the width of the cage body is 22mm, the height of the front side is 12mm, and the height of the rear side is 6 mm.

Through the arrangement, the height of the front side is higher than that of the rear side, so that a certain included angle is formed between the front side and the rear side, and the operation can be corrected conveniently.

Drawings

FIG. 1 is a front view of the metal rubber lateral lumbar interbody cage of the present invention;

FIG. 2 is a top view of the metal rubber lateral lumbar interbody cage of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

the names of corresponding labels in the drawings are:

the fusion cage comprises a fusion cage body 1, a front side 2, a back side 3, a pushing groove 4, a bone grafting cavity 5, a reinforcing grid 6 and a side hole 7.

Detailed Description

The utility model is described in further detail below with reference to the following figures and embodiments:

as shown in fig. 1 to 3, metal rubber side way lumbar vertebrae interbody fusion cage, including fusion cage body 1, fusion cage body 1 is made by metal rubber material, fusion cage body 1 is oval, fusion cage body 1 is equipped with multiple inclination and length model, the length of fusion cage body 1 is 50mm, the width of fusion cage body 1 is 22mm, fusion cage body 1 includes front side 2 and rear side 3, the height of front side 2 is 12mm, the height of rear side 3 is 6mm, propulsion groove 4 has been seted up on fusion cage body 1's right side, bone grafting chamber 5 has been seted up at fusion cage body 1's middle part, bone grafting chamber 5 internal fixation bonds and has strengthened net 6, fusion cage body 1's upper and lower surface all is the cockscomb structure, side opening 7 has been seted up to fusion cage body 1's front and back lateral wall intercommunication.

The specific implementation process is as follows:

before the interbody fusion cage is used, firstly, the inclination angle and the length model of the fusion cage body 1 are selected according to the spinal condition of a patient, then, the fusion cage body 1 is selected and determined, then, autograft bone or graft bone substitutes are filled in the bone grafting cavity 5 and are tightly filled, and then, an inserter is inserted into the pushing groove 4 to complete the implantation of the fusion cage body 1; wherein the reinforcing mesh 6 in the bone grafting cavity 5 is beneficial to improving the fastening strength of filling the autograft bone or the graft bone substitute, and the height difference of the front side 2 and the back side 3 is beneficial to reconstructing the convex angle of the lumbar.

The above description is only an example of the present invention, and the common general knowledge of the technical solutions or characteristics known in the solutions is not described herein too much. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (6)

1. Metal rubber lateral lumbar interbody fusion cage, its characterized in that: including fusing ware body (1), fuse ware body (1) and make by metal rubber material, fuse ware body (1) including front side (2) and rear side (3), the height that highly is higher than of front side (2) rear side (3), impel groove (4) have been seted up to the lateral wall that fuses ware body (1), fuse ware body (1) is the ellipse, bone grafting chamber (5) have been seted up at the middle part that fuses ware body (1).

2. The metal rubber lateral lumbar interbody fusion cage of claim 1, wherein: the upper surface and the lower surface of the fusion device body (1) are both in a sawtooth shape.

3. The metal rubber lateral lumbar interbody fusion cage of claim 1, wherein: the fusion cage body (1) is further connected with a reinforcing grid (6), and the reinforcing grid (6) is arranged on the inner side of the bone grafting cavity (5).

4. The metal rubber lateral lumbar interbody fusion cage of claim 1, wherein: the side wall of the fusion cage body (1) is provided with a side hole (7).

5. The metal rubber lateral lumbar interbody fusion cage of claim 1, wherein: fuse ware body (1) and be equipped with multiple inclination model, fuse ware body (1) is equipped with multiple length model.

6. The metal-rubber lateral lumbar interbody fusion cage of claim 5, wherein: the length of fuse ware body (1) is 50mm, the width of fuse ware body (1) is 22mm, front side (2) height is 12mm, the height of rear side (3) is 6 mm.

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