Abstract: An acetabular shell is implanted at an acetabulum in a deficient pelvis to establish an effective acetabular site with increased support in posterior and superior directions for an acetabular bearing insert to be affixed in place in the acetabular shell for the reception of a femoral head of a femoral component of a prosthetic hip implant, the acetabular shell including a domed portion having a convex outer surface for engaging the acetabulum, a concave inner surface for reception of the bearing insert, the inner surface extending along a spherical contour up to a generally hemispherical extent, and a rim between the outer and inner surfaces, the rim being placed adjacent an equatorial location along the domed portion and including a superior segment, an inferior segment longitudinally opposite the superior segment, a posterior segment and an anterior segment laterally opposite the posterior segment, an anchoring plate integral with the domed portion adjacent the superior segment of the rim, and a supplementa