CEMENTLESS PRIMARY TOTAL HIP-REPLACEMENT - 4 TO 8 YEAR RESULTS WITH THE ZWEYMULLER-ALLOCLASSIC(R) PROSTHESIS

One hundred and twenty-nine consecutive cementless primary total hip a rthroplasties with Zweymuller-Alloclassic(R) grit-blasted titanium com ponents were evaluated prospectively at an average follow-up of 5.9 ye ars. The clinical results were graded as excellent or good in 116 hips (90%), fair in 12, and poor in one due to a fracture of the femoral s haft at operation beading to early stem loosening and delayed ring loo sening. Failure was defined as definite aseptic loosening, and the fin al survivorship at 8 years was 99.3% for the SL-stem, and 99.1% for th e CSF-threaded cup. These early results compare favourably with those of total hip arthroplasties using new cementing techniques.