Cervical vertebrae inter-vertebral disc prosthesis

Abstract

The invention discloses a cervical vertebrae inter-vertebral disc prosthesis fixed between vertebral bodies. The prosthesis comprises an upper end plate (1), a lower end plate (3), and a sliding kernel (2) arranged between the upper end plate (1) and the lower end plate (3). The sliding kernel (2) is fixedly connected with the lower end plate (3) and provided with an upper protruding contact surface (21). The upper end plate (1) is provided with a lower sinking contact surface (11). The sliding kernel (2) can rotate in the lower contact surface (11) of the upper end plate (1) so that the cervical vertebrae inter-vertebral disc prosthesis can move freely between the vertebral bodies. According to the cervical vertebrae inter-vertebral disc prosthesis, after the artificial cervical vertebrae inter-vertebral disc is transplanted into the human body after an operation, a user can bend, stretch and laterally bend the cervical vertebra freely like a normal person, pressure on lesion sections can be reduced thoroughly, the vertebral column sequence is reconstructed, the biomechanics environment of a replacement stage is retained, and meanwhile regression of adjacent joints can be effectively prevented; the prosthesis has good biocompatibility with the human body.

Description

technical field [0001] The invention relates to a medical prosthesis, in particular to a cervical intervertebral disc prosthesis for replacing a herniated intervertebral disc. Background technique [0002] With the rapid development of my country's economy, industrial transformation, and changes in the nature of people's work and living habits, the incidence of cervical spondylosis has also become more common, and younger ages. Mild cervical spondylosis can cause neck and shoulder pain, dizziness, and limb weakness. If it is not corrected and treated in time, it is likely to cause cervical intervertebral disc lesions, and the rupture of the intervertebral disc will protrude to the surrounding area, which will stimulate the surrounding nerve tissue and cause severe bone hyperplasia, which will eventually lead to compression of the nerve, causing cervical joint dislocation and causing the patient to lose mobility. [0003] At present, the domestic treatment methods for such dis...

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic treatment methods for such diseases are mainly anterior cervical decompression fusion and vertebral body replacement. However, problems such as loss of mobility of the fusion segment and degeneration of adjacent segments after fusion have plagued spine surgeons.

Existing surgical products have disadvantages such as complicated surgical process, long time, not easy to fix, easy wear of metal contact surface, poor postoperative mobility, etc.

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