Anterior lumbar vertebra interbody fusion cage for interbody fusion

An intervertebral cage and intervertebral technology, which is used in medical science, prosthesis, joint implants, etc., can solve the problem of low hardness of the upper endplate of the lower vertebral body, difference in hardness of the vertebral body endplate, and poor fixation effect. good question

Inactive Publication Date: 2018-05-22
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it was found anatomically that there is a significant difference in the hardness of the vertebral endplates adjacent to the upper and lower end surfaces of the fusion cage, and the hardness of the upper endplate of the lower vertebral body is low
If a cage with a symmetrical design of meshing teeth is implanted in the intervertebral space, the meshing teeth on the lower end of the body will first bite the upper endplate of the lower vertebral body, while the meshing teeth on the upper end of the body will not bite the upper endplate of the upper vertebral body. The lower endplate, the fixation of the cage in the intervertebral space only depends on the upper endplate of the lower vertebral body, and the fixation effect is not good

Method used

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  • Anterior lumbar vertebra interbody fusion cage for interbody fusion
  • Anterior lumbar vertebra interbody fusion cage for interbody fusion
  • Anterior lumbar vertebra interbody fusion cage for interbody fusion

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with accompanying drawing:

[0026] see figure 1 As shown, the anterior lumbar intervertebral fusion device provided by the present invention has a horseshoe shape as a whole, including straight upper end faces 1 and lower end faces 2 that are in contact with the upper and lower adjacent vertebral body endplates, and the straight left end face 2 in the long side direction. The side wall 3, the right side wall 4, and the front end surface 5 and the rear end surface 6 in the direction of the short side; the front end surface 5 is concave, which can reserve sufficient space for the nerve root, and the rear end surface 6 is convex, with two threads The holes 61 and 62 can be used for implanting directly in front of the intervertebral disc or in front of the side.

[0027] see figure 1 , figure 2 As shown, a central vertical opening 7 runs through between the upper end surface 1 and the lower ...

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Abstract

The invention relates to an anterior lumbar vertebra interbody fusion cage for interbody fusion. The fusion cage comprises an upper end face, a lower end face, side walls and a through hole running through the upper and lower end faces so that bone graft or substitution growth, the side walls include the left side wall, the right side wall, the front wall and the rear wall, the fusion cage is characterized in that the front wall reserves sufficient inward concave space for the nerve root, and the rear wall protrudes outwards and is provided with at least two holes for implantation of dead front or side front of the intervertebral disc. The anterior lumbar vertebra interbody fusion cage for interbody fusion is better in fixing effect, and it is protected that the nerve root and the centrumend plate are attached better.

Description

technical field [0001] The invention relates to an anterior lumbar intervertebral fusion device for intervertebral fusion. Background technique [0002] At present, the meshing teeth on the upper and lower end surfaces of the spinal intervertebral fusion device adopt a symmetrical design, such as CN102781373 (A) and EP3011933 (A1), which are simple and beautiful, and can play a role in preventing loss. However, it was found anatomically that there was a significant difference in the stiffness of the vertebral endplates adjacent to the upper and lower end surfaces of the fusion cage, and the hardness of the upper endplate of the lower vertebral body was low. If a cage with a symmetrical design of meshing teeth is implanted in the intervertebral space, the meshing teeth on the lower end of the body will first bite the upper endplate of the lower vertebral body, while the meshing teeth on the upper end of the body will not bite the upper endplate of the upper vertebral body. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44A61F2/30
CPCA61F2/30771A61F2/4455A61F2002/30772
Inventor 刘伟强李朝春张振军祝佳廖振华卢俊哲
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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