Porous plate type artificial cervical intervertebral disc prosthesis

Abstract

The invention discloses a porous plate type artificial cervical intervertebral disc prosthesis comprising an upper end plate and a lower end plate, wherein a spherical dome I with a porous structure and a conical bump I are arranged on the upper surface of the upper end plate, a hemispherical bump is arranged on the lower surface of the upper end plate, and a clamping boss I extending upwards is arranged on the side edge of the upper end plate; a spherical dome II with the porous structure and a conical bump II are arranged on the lower surface of the lower end plate, an ellipsoid groove is arranged on the upper surface of the lower end plate, and the hemispherical bump and the ellipsoid groove are matched with each other to form a ball groove joint, and a clamping boss II extending downwards is arranged on the side edge of the lower end plate. By using the porous plate type artificial cervical intervertebral disc prosthesis, dissection curved surfaces of an upper centrum and a lower centrum can be reserved in an operation, damage to original centrum structures is reduced, and the porous plate type structure has the latent function of prompting bones to grow in, and thus the artificial cervical intervertebral disc prosthesis has the long-term stabilizing capacity; the ball groove joint has three-dimensional multi-freedom degree activities such as rotation, flexion and extension and side bending, and meets the motion function of a normal intervertebral disc in a human body.

Description

technical field [0001] The invention relates to the technical field of structural design and application of medical supplies, and in particular provides a porous endplate type artificial cervical intervertebral disc prosthesis for completely replacing human cervical intervertebral discs. Background technique [0002] Anterior cervical discectomy, fusion and internal fixation (ACDF) has been the "gold standard" for the treatment of cervical disc degeneration for many years. However, although this operation can effectively relieve the symptoms of the diseased segment, the fusion will lead to the loss of physiological activity of the diseased segment, and the increase of motion and load of the adjacent segment, which will accelerate the degeneration of the adjacent segment to a certain extent (see reference Literature 1. Carrier CS, Bono CM, Lebl DR. Evidence-based analysis of adjacent segment degeneration and disease after ACDF: a systematic review. The spinejournal.2013; 13:1...

AI Technical Summary

Problems solved by technology

Although the coating has good biocompatibility, with the in vivo absorption of the coating, the problem of bone-prosthesis interface loosening follows, and the long-term stability of the artificial disc prosthesis is still not well maintained

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