An acetabular cup includes a plurality of bone receiving depressions on its convex exterior surface. Bone, obtained from the femoral head of the hip to be replaced, is morselized and then compressed in the bone receiving depressions. The dense bone on the exterior surface of the acetabular cup serves...http://www.google.co.uk/patents/US5549699?utm_source=gb-gplus-sharePatent US5549699 - Bony fixation and support of a prosthesis
