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Intervertebral fusion device

An intervertebral cage and intervertebral technology, which is used in medical science, prosthesis, surgery, etc., can solve the problem of large hollow volume of the intervertebral cage, increase the hollow volume or the thickness of the surrounding wall, and reduce the intervertebral cage and the vertebral body. Plate contact pressure, etc.

Inactive Publication Date: 2005-09-21
王岩 +1
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Problems solved by technology

[0005] Since the support performance of the intervertebral fusion cage is mutually restricted by the area of ​​bone graft and the amount of bone graft, effective and durable support performance requires the surrounding wall of the fusion cage to have a certain thickness to reduce the contact pressure between the fusion cage and the endplate of the vertebral body; However, a better bone graft fusion rate requires a large hollow volume in the intervertebral fusion cage, so simply increasing the hollow volume or surrounding wall thickness cannot completely solve the above problems

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Embodiment Construction

[0024] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] image 3 It is a structural schematic diagram of the intervertebral fusion device of the present invention. Such as image 3 As shown, the intervertebral fusion device 1 of the present invention is an annular hollow rectangular cylinder, and one side of the rectangular cylinder is set as an opening. Specifically, the cross-section is Shaped rectangular cylinder is made up of front plate 11, side plate 13 and rear plate 12 with left or right opening cylindrical structure.

[0026] The upper and lower surfaces of the intervertebral cage 1 are set as anti-skid surface structures, which increase the frictional resistance when contacting the upper and lower lamina and prevent it from moving between the vertebrae. The anti-slip surface structure of the upper and lower surfaces refers to a regular or irregular rough surface, further, it...

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Abstract

The invention is a facet fusion with annular hollow cylinder figuration. Wherein, the side wall of the cylinder has an opening, the upside surface and the down-side surface have antiskid superficial structure, and the shape is near to the upside and down-side end-plate. The optimization plan is the annular hollow rectangular cylinder, and the transverse section exposes mouth shape. The invention has the effect of stability and lasting support, meanwhile the bone transplantation area and the bone transplantation quantity is twice than the normal structure, to increase the fusion ratio of the bone transplantation substantially, and to eliminate the problems to some essence such as depression after implantation as well as the intervertebral high lost. In addition, the invention provides a propulsion to push the facet fusion into the intervertebral space.

Description

technical field [0001] The invention relates to a spinal internal fixation device, in particular to an intervertebral fixation device, in particular to an intervertebral fusion device. Background technique [0002] The application of intervertebral fusion cages to treat spinal diseases has a history of nearly 20 years. Many years of research and experiments by domestic and foreign scholars have shown that an ideal intervertebral fusion cage should have an appropriate volume (contact area) and surrounding wall thickness, which can provide sufficient It has a stable, long-lasting support function, and can provide enough space to fill the grafted bone. [0003] Conventional intervertebral fusions such as figure 1 As shown, intervertebral fusion devices are respectively arranged on the left and right sides of the intervertebral space. The intervertebral cage is a hollow cube (box-shaped) structure, and its upper and lower surfaces are respectively in contact with the upper and...

Claims

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Application Information

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IPC IPC(8): A61B17/56
CPCA61F2/44A61F2002/30001
Inventor 王岩张雪松
Owner 王岩
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