acetabular cup prosthesis的用法和样例：
- Figure 7-43 GAP (graft augmentation prosthesis) acetabular cup has titanium ring with inferior hook and two superiorly placed plates with additional dome screw holes.
- Implant malposition of acetabulum cup could he detected in 6 in X-rays, inadequate soft-tissue tension in 8 cases.
- Cementless acetabular cups were introduced to alleviate the difficulty with fixation failure of cemented polyethylene sockets.
- Conclusion: The best method is to place the acetabular cups properly, adopting modern bone cement technology and rehabilitation training by specialist doctor.