An acetabular or cotyloid implant. The implant includes a cotyle having an internal cavity which is adapted to receive an insert. At least one groove is arranged on an outer surface of the cotyle. The at least one groove is adapted to receive an independent element....http://www.google.es/patents/US6454809?utm_source=gb-gplus-sharePatente US6454809 - Modular acetabular or cotyloid implant