DISC PROSTHESIS FOR CERVICAL VERTEBRAE

摘要

The invention relates to a disc prosthesis for cervical vertebrae, comprising two sets (12, 14) each made up of a prosthetic plate (16, 20) and an insert (18, 22), characterised in that: said plates and inserts are made from different biocompatible materials which are transparent to medical imaging, the plate (20) of the second set has an opening (42) in both faces thereof, the second insert (22) has a fixation piece (44) with a force fit in the opening (42) of the second plate and a piece (46) forming a convex spherical cap the external dimensions of which are greater than those of the opening to give a support shoulder (50) and further comprising anchoring wings (24) made from a biocompatible material which is non transparent to medical imaging, each wing having fixation extensions (56, 58) which forcibly penetrate into fixation holes (64, 66, 68, 70) provided in the plates.