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.