Due to long-term injuries, cervical intervertebral disc or bone hyperplasia, emergence, ligament, causing cervical spinal cord thickening, nerve root or vertebral artery pressure, appear a series of clinical syndrome -- the dysfunction, this is a kind of cervical spondylosis tendinosis Daniel to change on the basis of disease. It is common and frequently-occurring diseases among elderly people, even some young people also suffer from the disease.
According to the disease, this paper designs a cervical vertebra, the fusion between vertebral implantation after implantation in the human body vertebra, stabilizing rachis, osteoarthritis, prevent disc fusion of degenerative deformation to a certain extent, restore intervertebral space height.
Based on software mimics, then through rebuilding cervical model establishment, Solidworks software ANSYS software reuse and Solidworks interface import by finite element analysis.
This paper designs the cervical vertebra implantation after spinal reconstruction after the total deformation occurs at the side of the load, and the smallest serrated total deformation occurs in the side constraints, serrated, the maximum equivalent elastic strain and the maximum equivalent stress occurred in the middle surface after partial position, minimum equivalent elastic strain and minimum equivalent stress of serrated next surface.
The cervical vertebral strength between the cervical fusion meets the biomechanical characteristics, but failed to consider when designing bone graft versus discectomy contact window and the ratio of the area, the correct design should guarantee is the window of bone graft can fill the bone, but also to maintain proper contact area, if the contact area small will cause the subsidence effect. And when the design also didn't consider the height, serrated, serrated if too may also occur, causing cervical settlement effect of degenerative deformation, but if the zigzag too low, causes of fusion device, thus not slippage of the height of recovery.
Choose the material of fusion of PEEK also exists many limitations, PEEK materials of fusion is not absorbed into the body, also exist for reoperation placeholder effect, or adjacent segmental surgery, as a foreign body in the cage, still is the potential for the rejection reflects the source, the design, the cage appearance with normal cervical vertebra forms are not detrimental to promote bone fusion.
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