Abstract
We reviewed 96 consecutive cementless total hip replacements with four different designs; 21 PCA, 25 Harris Galante Porous/Harris Galante I (stem/cup), 25 Profile Porocoat/Tri-Lock Plus (stem/cup) and 25 Profile HA-coated/Tri-Lock Plus (stem/cup). The operations were performed in the period 1984 to 1991. Median follow-up ranged from 12 to 16 years in the four groups. Mean linear wear rates ranged from 0,17 to 0,21 mm/year in the four groups, and there were no statistically significant differences between the groups (p=0,9). Moderate or extensive osteolysis was found in 46 of the 96 included hips. The association between wear and extent of osteolysis was statistically significant (p=0,006). We found poor twelve-year survival of the primary prostheses in all four groups (50–70%), mainly due to revisions because of wear of the polyethylene liner and/or osteolysis. The sparsely documented Profile/Tri-Lock Plus systems did not perform statistically significantly better than the PCA and the HG. The poor long term results with these uncemented total hip arthroplasties illustrate the necessity of regular radiographic evaluation in order to detect osteolysis and liner-failure which both generally are asymptomatic until catastrophic failure appears.
Theses abstracts were prepared by Professor Roger Lemaire. Correspondence should be addressed to EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
