An acetabular hip implant includes an acetabular shell component having a first feature and a first insert having a second feature that cooperates with the first featureof the acetabular shell component and further includes a third feature. The implant further includes a second insert having a fourth feature that cooperates with the third feature of the first insert and further includes a fifth feature. A femoral head component includes a sixth feature that cooperates with the fifth feature. Interaction between the first and . . .. second features, between the third and fourth features, and between the fifth and" sixth features mechanically constrains the acetabular hip implant to prevent dislocation of the femoral head during rotation.
