Abstract
In 80 patients with a mean age of 50 years, 97 uncemented primary THAs were performed using a titanium stem with a proximal circumferential plasma spray coating. Three different acetabular components were used, in 70% of cases a threaded and partly porous-coated design.
At a mean follow-up of 8 years, two femoral components had been revised. One stem was revised 103 months after insertion owing to a comminuted fracture of the proximal femur, and one 104 months after insertion owing to deep infection. There were no stem revisions for aseptic loosening. We calculate the probability of survival of the femoral component at 0.98%. Sixteen acetabular components (14 threaded cups) had been revised in 13 patients. One femur had areas of distal osteolysis, associated with verified deep infection, but no signs of proximal loosening. Three femora had areas of minor proximal osteolysis. The mean Harris hip score at the latest follow-up was 91 points.
We conclude that an uncemented titanium femoral component with a proximal circumferential plasma spray coating is an excellent option in THA in the young patient. As reported previously, aseptic loosening of threaded acetabular components was common.
Secretary: Dr H.J.S. Colyn, Editor: Professor M.B.E. Sweet. Correspondence should be addressed to SAOA, Box 47363, Parklands, Johannesburg, 2121, South Africa.
