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

The first consecutive 250 implantations of an uncemented, proximally anchor ed straight femoral shaft prosthesis (BICONTACT) in 236 patients are includ ed in this prospective follow-up study. Average rime of follow-up evaluatio n 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 infec tion, I for recurrent dislocation, 2 for component undersizing with rapid s ubsidence, and 1 for aseptic loosening of a varus-malaligned stern; 1 radio logically well-fixed stem had been revised during acetabular revision. Over all 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 di stal zones of the femoral shaft, but no radiolucencies could be found in th e 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.