A calcar collar is protective against early periprosthetic femoral fracture around cementless femoral components in primary total hip arthroplasty

Abstract

Analysis of features of stem design in registry data is a useful method of identifying implant characteristics that affect the risk of early periprosthetic fracture around a cementless femoral stem. A collar on the calcar reduced the risk of an early periprosthetic fracture and this was confirmed by biomechanical testing. This approach may be useful in the analysis of other uncommon modes of failure after THA. Cite this article: <i>Bone Joint J</i> 2019;101-B:779-786.