Abstract
Aims: Clinical and radiographical evaluation of cement-less and screwed acetabular cups in rheumatoid hip arthritis. Methods. There were 88 THA using a Zweymuller screwed cup in 72 rheumatoid patients that were implanted from 1985 to 1994 at the above center. Mean age was 54 years with 17 male and 55 females. Nine cases underwent autologous bone grafting of type III acetabular defects. Complete follow-up data were available in 63 cases with follow-up from 2 to 15 years (mean 5.6 years). All cases were evaluated utilizing IDES questionnaires and Merle dñAubigne scores both pre- and postoperatively. Results: 5.2 (max 6), Scores for range of motion and mobility were 10.9 (of 12). There were no radiolucent lines in 56 of 63 (89%) cups with four (6%) cups showing radiolucencies of less than 3 mm and three (5%) cups demonstrating radiolucencies in combination with cup migration. The later were considered loose and are carefully monitored. Two cups were loose and underwent revision. Conclusions: Uncemented screwed cups in rheumatoid hip arthritis have shown satisfactory outcome at the mid-term and are, therefore, recommended in this difþcult subset of rheumatoid arthritic hip patients.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
