The Use of a Dual Bearing Prosthesis in Revision Surgery

Fifteen patients had revision of a failed hip arthroplasty using a dual bearing prosthesis. Bone grafting for acetabular bone loss was necessary in seven patients. Two of these seven patients required allografting.These patients were retrospectively reviewed. JOA hip score was used for clinical assessment. The preoperative JOA hip scores averaged 61.6 points and postoperative scores averaged 80.7.Migration of the prosthesis and graft incorporation were monitored roentgenogr aphically. Proximal migration ranging from 1mm to 4mm occurred in four patients. Two patients had 4mm of distal migration. Noprogress ion of migration was seen radiographically at the last follow-up.