| abstract |
A disc prosthesis, suitable for replacing an intervertebral disc, includes a first (1; 1') and a second (2; 2') articulation component. The components comprise respective endplates (11, 21; 11', 21') suitable for being anchored to respective vertebrae. . The first articulation component further comprises a spacer member (13; 13') suitable for being interposed between the endplates, and which is disposed on the endplate (11; 11') of the first component (1; 1') and has a convex articulation surface (19; 19') suitable for being placed in contact with a corresponding concave articulation surface (29; 29') disposed on the endplate of- the second component. The articulation -components are made at least partially of polyethylene reinforced with calcium phosphate, one of same further having a part (17; 27'), facing towards the other articulation component, which is made of ultra-high molecular weight polyethylene, and on which one of the articulation surfaces is provided. |