Cotyloidal implant

摘要

In a cotyloid implant comprising a small hemispherical metal cup which receives an insert or nucleus cooperating with a femoral head, the outer surface of the cup can be deformed elastically and the internal surface receiving the nucleus remains rigid and non-deformable. The internal surface of the cup includes fixing devices which can be engaged (if required) with corresponding devices on a nucleus of plastics (preferably polyethylene) or ceramic.