Bone removed in two different concepts of Hip bone conservative arthroplasty

Bone saving remains a priority in hip arthroplasty. Birmingham hip resurfacing [BHR] and thrust plate arthroplasty [TPA] are two different designs aiming at bone conservation. By measuring bone removed intraoperatively during 11 BHR, eight TPA and a control group of 15 hybrid hip arthroplasty it was found that BHR and TPA saved significant amount of bone if compared to hybrid hip arthroplasty [ANOVA p < 0.001]. Comparing BHR with TPA; BHR saved a significant amount of bone on the femoral side [ANOVA p < 0.001] while TPA saved a significant amount of bone on the acetabular side [ANOVA p = 0.03]. Preference between the two designs will depend on the long-term results and the degree of bone loss resulted from loosening and osteolysis at revision operation