Early results of revision dual mobility uncemented cups with impaction autologous and synthetic bone graft composite in revision hip arthroplasty for cavitary acetabular defects: A retrospective case series

Abstract

Background: The presence of cavitary acetabular defects can present a major challenge during revision hip arthroplasty. The purpose of this study was to retrospectively review the early clinical and radiographic outcomes of a dual-mobility, cementless acetabular shell system when combined with autologous or synthetic bone graft substitute composite in revision hip arthroplasty for cavitary acetabular defects. Methods: Fourteen revision hip arthroplasties for acetabular protrusion and cavitary acetabular defects were performed at our institutions between May, 2015 to June, 2016. A direct lateral approach was used for all patients. All patients were assessed with the Oxford Hip Score. Serial postoperative radiographs were assessed for signs of osseointegration and acetabular component migration. Failures were defined as gross acetabular component migration and deterioration of patient self-reported outcome score postoperatively. Results: After a mean follow-up of 28.9 mo, the Oxford Hip Score and hip pain scores were significantly improved (P≤0.01). Radiographically sufficient bone graft osseointegration was obtained in all patients with no detected acetabular component migration. Conclusions: This study showed good overall short-term functional and radiographic outcomes of the dual-mobility, uncemented acetabular shell system in combination with autologous or synthetic bone graft composite in revision hip arthroplasty for cavitary acetabular defects. Level of Evidence: Level IV.