Convened under the auspicious of esteemed endorsers - ISTA

3, 6, 12, 18, and 24 months post-operatively, to assess postoperative peri-prosthetic BMDchange. All the femoral components were fixed with cement by a single surgeon.Preoperatively, the difference between gender, diagnosis, age, BMD in femoral neck, wrist,lumbar spine, and knee between two groups were not significant. In fixed bearing group, BMDaround the femoral component decreased postoperatively (-1 to -15%). In mobile bearinggroup, however, BMD increased postoperatively (8 to 11%). The difference of postoperativeBMD change between two groups was significant (p