The Relationship Between Acetabular Osteolysis Volume and Cup-Lesion Interface Involvement in Cementless Total Hip Arthroplasty

Periprosthetic osteolysis is among the most common long-term complications associated with cementless total hip arthroplasty (THA). Although most investigators have focused on the size of osteolytic lesions, others have proposed that the surface area of the cup involved with the osteolytic defects may be more relevant to the assessment of impending loosening. Using computed tomographic (CT) imaging, this study investigated the 3-dimensional pattern of expansile osteolysis and determined how much of the cup’s porous-coated surface area was involved with osteolysis among one type of hemispheric cup with a single apical hole.