Revision of Dual Mobility Implants Due to Impingement and Femoral Neck Notching: A Case Series

Impingement of femoral stems against metal dual mobility (DM) acetabular components after total hip arthroplasty (THA) can lead to notching of the femoral neck. The consequences may include debilitating pain, mechanical symptoms, release of metal debris, aseptic cup loosening, joint instability, dislocations, and the theoretical risk of femoral implant fracture. We report a primary case of a 35-year-old female who experienced impingement and femoral notching following DM THA and subsequently underwent revision due to these complications. This case is part of a series of 4 patients with similar complications. Following revision, all patients experienced symptom relief. Further studies are needed to determine the incidence of this issue, identify risk factors, and evaluate the outcomes of revision versus nonsurgical management for both symptomatic and asymptomatic cases.