Fig. 7
A A 68-year-old male was diagnosed with right hip prosthetic aseptic loosening 20 years after THA. B AM model showed that the entire superior acetabulum was defective while the ischial ramus and the pubic ramus was intact. The remaining bone was difficult to support the rotational and vertical stability of the cup. An augment was designed to rebuild the superior acetabulum. The vertical stability could be achieved and the rotational stability could be ensured by clamping the cup with the superior augment, the ischial ramus and the pubic ramus. C Acetabulum reconstruction was made by three customized augments reinforcing the right acetabulum and a commercial cup