Fig. 8

A A 60-year-old female was diagnosed with right hip prosthetic aseptic loosening 1 year after right hip revision. B AM model showed the inferior, superior and anterior acetabulum and the ischial ramus was defected. The vertical and rotational stability of the cup cannot be obtained and it was difficult to reconstruct one place by augments to obtain a firmly clamped cup. C A customized cage was used. Rotational stability was obtained with cage wing fixed into the ala of ilium and the ischial ramus by screws. Vertical stability was ensured by the acetabular cup directly contacting the superior host bone