Long-stem cemented calcar replacement arthroplasty for proximal femoral bone loss

Revision total hip arthroplasty with accompanying bone defects may require calcar replacement prostheses to restore hip stability and function. Twenty-nine hips in 27 patients were followed for a mean of 41 months (range, 24-101 months). The average Harris Hip Score increased from 34 to 82 points. Acceptable cement mantles (A, B, C1) were present in all cases. Three femoral components (10.3%) were re-revised as a result of aseptic loosening. Two others (6.9%) were loose by radiographic criteria. Thus, 24 (82.8%) of the 29 index femoral components were rigidly fixed according to radiographic criteria, whereas 26 (89.7%) still were in place at the time of review. The results of this study suggest that long-stem cemented calcar-replacement prostheses with modern cementing technique are a reasonable option in femoral revision arthroplasties involving proximal bone loss.