A hip replacement implant is a ball-in-socket mechanism, designed to simulate a human hip joint. Typical components include a stem that inserts into the femur (thighbone), a ball that replaces the round head of the thigh bone, and a shell that lines the hip socket. Compared to a traditional prosthesis for a hip replacement, a dual mobility implant provides an additional bearing surface. With the dual mobility hip, a large polyethylene plastic head fits inside a polished metal hip socket component, and an additional smaller metal or ceramic head is snap-fit within the polyethylene head.