We evaluated the use of bilobed acetabular components in the treatment of acetabular deficiency during revision and complex primary total hip replacements. 79 patients (83 hips) were operated upon between august 1990 and December 2005 64 patients were reviewed clinically and radiologically.7 patients had died from unrelated causes. 3 patients were followed up clinically and radiologically for one year and were doing well at their last appointments. 5 were lost in follow up. The mean follow up of patients was 5.5 year (range, 2–15 years). One patient was revised for aseptic loosening.

The average post operative Harris hip score was 94.9 (range 74–100) at the last follow up appointments of 68 patients. Two patients developed deep wound infection and one patient dislocated three months post operatively, treated with a constrained liner. At the latest follow up the cumulative survival rate for aseptic loosening with revision being the end point is 97% at 15 years.

These results support the use of bilobed of-the-shelf cups in the reconstruction of acetabular defects with intact anterior and posterior columns.