Fusion cage

Abstract

The invention discloses a fusion cage. The fusion cage comprises a frame and a porous structure, an inner space is formed in the frame in a defined mode, and through holes are formed in the side wall, the front wall and the rear wall of the frame; the porous structure is arranged in the inner space and provided with multiple micropore units communicated with the through holes, and the micropore units are combined together in a three-dimensional network shape. The strength and rigidity of the fusion cage can be improved by adopting the frame structure; the through holes are formed in the frame, the porous structure is arranged in the frame and comprises multiple micropore units combined in the three-dimensional network shape, the bone induction capacity can be improved substantially, and synosteosis is facilitated.

Description

technical field [0001] The present invention relates generally to fusion devices, and in particular, to a fusion device for intervertebral fixation of the spine. Background technique [0002] At present, fusion cages for spinal intervertebral fixation are widely used, and their structures usually include the following types. [0003] The first one uses peek material. Although this method has better biocompatibility, its osteoinductive ability is poor; and the bone graft space of the fusion cage is limited, making it difficult for the bony endplate to form bone ingrowth with the surface of the PEEK fusion cage. . Patients experience poor immediate cage stability, loss of position, and eventual nonfusion after surgery, leading to surgical failure. [0004] The second type uses a titanium alloy metal fusion cage. This method is very different from the elastic modulus of the human body, and has high rigidity, which is not conducive to osseointegration. [0005] The third meth...

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Problems solved by technology

[0003] The first one uses peek material. Although this method has better biocompatibility, its osteoinductive ability is poor; and the bone graft space of the fusion cage is limited, making it difficult for the bony endplate to form bone ingrowth with the surface of the PEEK fusion cage.

Patients experience poor immediate fusion stability, loss of position, and eventual nonfusion of the fusion cage after surgery, leading to surgical failure

[0004] The second type uses a titanium alloy metal fusion cage, which is very different from the elastic modulus of the human body, and has high rigidity, which is not conducive to osseointegration

[0005] The third method uses Tan metal deposition. This method adopts a fully porous design. The disadvantage is that the rigidity is not enough and there is no osteoinductive ability.

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