Acetabular cup assembly for multiple bearing materials

An acetabular cup assembly comprising:

• a. a shell, the shell having an inner surface and an outer surface, said inner surface further comprising a first groove, a second groove, and a tapered inner wall;
• b. a liner adapted to fit within said inner surface of said shell;
• c. wherein the liner is selected from the group consisting of a polymer liner, a ceramic liner, and a metal liner;
• and
• d. wherein the polyethylene liner comprises an inner portion and an outer portion, said outer portion including a first bump and a second bump, the ceramic liner further comprises a band, and the metal liner further comprising a tapered outer portion.