Abstract: A prosthetic implant assembly including a modified liner configured for fixation to an acetabular shell. The modified liner having a sheath and a liner. The liner is configured to be inserted into and affixed to the sheath. The sheath having an annular rim, a plurality of longitudinal ribs extending from the annular rim, and a cross-rib spaced apart from the annular rim and intersecting the plurality of longitudinal ribs. Each longitudinal rib of the plurality of longitudinal ribs is curved such that the plurality of longitudinal ribs collectively define a partially spherical surface. Additionally, the annular rim, the plurality of longitudinal ribs, and the cross-rib define a plurality of openings between the annular rim and the cross rib.