Bilobed oblong porous coated acetabular components in revision total hip arthroplasty

Thirty-eight oblong bilobed noncustom uncemented, porous-coated titanium ac etabular components were used to reconstruct failed hip arthroplasties with large superior segmental acetabular bone deficiencies. No structural bone grafts were used. till patients were followed up for 2 to 5 years (mean, 3 years) after the operation. One patient (whose socket rested primarily on a structural hone graft from a previous procedure) had revision surgery for acetabular loosening, No other patients have had revision surgery or had an other ipsilateral hip operation. At latest followup, 35 patients had no or mild pain and two patients had moderate pain. Two implants migrated more th an 2 mm in the first year, then stabilized. On the latest radiographs, two implants had bead shedding, but there was no measurable migration or change in position. For selected patients with large superolateral acetabular bon e deficiencies, this implant facilitated a complex reconstruction, provided good clinical results, and showed satisfactory stability at early to midte rm followup in most patients.