Total hip arthroplasty using two different cementless tapered stems

The authors report their 15-year experience with primary total hip arthropl asty using collarless, tapered, porous-coated femoral stems (Trilock and Ta perloc) in patients with osteoarthritis, rheumatoid arthritis, and in octog enarians. Excellent clinical results were achieved in all groups at latest followup. For the patients with Trilock steins, Taperloc stems, and patient s who were octogenarians and patients with rheumatoid arthritis, Charnley p ain scores were 5.6, 5.5, 5.7, and 5.7; Charnley function scores were 5.2, 5.1, 4.2, and 5.3; Harris hip scores were 92, 92, 82, and 93 points, respec tively. There was a 2% rate of thigh pain with the Trilock, 4% with Taperlo c, 4% in octogenarians, and 2% in patients with rheumatoid arthritis. In 96 % of the patients in the Trilock group, in 100% of the patients in the Tape rloc group, in 100% of the patients who were octogenarians, and in 100% of the patients with rheumatoid arthritis, femoral components showed radiograp hic evidence of bone ingrowth. There were six (12%) femoral component revis ions in the Trilock group (all secondary to nonmodularity of the component at the time of acetabular revision), one femoral component revision in the Taperloc group and no femoral component revisions in the patients who were octogenarians or who had rheumatoid arthritis. Design features (collarless tapered wedge fit, circumferentially porous-coated) virtually ensure bone i ngrowth and are thought to be responsible for the excellent clinical result s and longevity.