Dislocation prevention type non-fusion artificial cervical vertebra and intervertebral disc system

Abstract

The invention discloses a dislocation prevention type non-fusion artificial cervical vertebra and intervertebral disc system comprising a vertebra body component and two end plate components, wherein the end plate components are connected to the upper end and the lower end of the vertebra body component respectively through a dome joint structure and L-type dislocation prevention structures on the front side and the rear side. End plate fixing screws are arranged on the two end plate components respectively. After corpectomy, the system can play a role in supporting at once, the motion function of the normal cervical vertebra is replaced through own interbody connecting parts, stress of the cervical vertebra can be dispersed in the motion process, internal stress of adjacent segment intervertebral discs and zygapophyseal joints can be reduced, and degeneration, which is caused by fusion, of the adjacent segments can be effectively prevented. In addition, stable bony fusion can be achieved through bone grafting and a hydroxyapatite coating on the surface of the system. The operation difficulty is small, trauma is small, and the system is convenient to popularize. Due to the fact that the dislocation prevention positions of the system are arranged, long-period stability can be achieved after the operation.

Description

technical field [0001] The invention belongs to the technical field of medical prosthesis manufacturing, and relates to an artificial cervical vertebra and intervertebral disc system, in particular to a dislocation-preventing non-fusion artificial cervical vertebra and intervertebral disc system. Background technique [0002] At present, anterior cervical corpectomy with fusion (ACCF) is a commonly used surgical method for the treatment of cervical spondylosis, cervical vertebral fracture with spinal cord compression, or old fracture and dislocation with incomplete spinal cord injury. . In this operation, the corresponding vertebral bodies and intervertebral discs are exposed through the anterior approach, and vertebral screws are respectively placed in the upper and lower adjacent vertebral bodies to be resected, and the diseased intervertebral discs at both ends are resected, and then bilateral hook vertebral joints (Luschka's joint) Most of the vertebral body and posteri...

AI Technical Summary

Problems solved by technology

Due to the limited surgical indications for artificial cervical intervertebral disc placement: single-segment or double-segment cervical disc herniation compresses the spinal cord or nerve roots, other types of cervical fusion such as subtotal cervical corpectomy, decompression and fusion still cannot be replaced by artificial cervical intervertebral disc. Disc Replacement Replacement

[0005] In summary, the current existing technology cannot avoid the disadvantages of loss of motor function after cervical subtotal corpectomy decompression and fusion and the problem of accelerated degeneration of adjacent segments caused by it

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