Results of an uncemented straight femoral shaft prosthesis after 9 years of follow-up

The first consecutive 250 implantations of an uncemented, proximally anchored straight femoral shaft prosthesis (BiCONTACT) in 236 patients are included in this prospective follow-up study. Average time of follow-up evaluation was 8.9 years (range, 7.4-10.7 years). At follow-up, 27 patients had died, and 2 could not be located. Seven patients underwent revision-2 for infection, 1 for recurrent dislocation, 2 for component undersizing with rapid subsidence, and 1 for aseptic loosening of a varus-malaligned stem; 1 radiologically well-fixed stem had been revised during acetabular revision. Overall survival was 97.1% after 11 years (confidence limits, 98.7% [upper] and 93.6% [lower]). The average Harris Hip score at time of follow-up was 84.3 points. Radiologically, tiny reactive lines (<2 mm) were present in the distal zones of the femoral shaft, but no radiolucencies could be found in the proximal anchoring zone. The midterm to long-term follow-up results with the evaluated femoral component are encouraging and are comparable to those of modern techniques of cementing in primary total hip arthroplasty.