Uncemented Hemispherical Acetabular Components in Revision THA

Hemispherical uncemented components have become the most frequently inserted components for acetabular revision. Reliable osseous fixation following press fit insertion with supplemental screw fixation has been achieved even in cases with significant acetabular deformities. Modular polyethylene liners have increased intraoperative flexibility with options for modifying head size, offset, and inclination. Cementable polyethylene liners allow independent positioning of the shell and articular surface and may reduce backside wear and facilitate improved liner positioning. Dislocation and infection remain leading complications after acetabular revision surgery.