Abstract
Aims: The purpose of this study was to analyse the clinical and radiological results and revision rate of Oxford II unicompartmental arthroplasty in a community hospital setting. Methods: 46 unicompartmental arthroplasties were evaluated after mean 8.4-year follow-up. Clinical results were analysed according to Knee Society and Lysholm scores. Radiologically tibiofemoral axis and possible radiolucent lines were measured. Kaplan-Meier survivorship curves, using revision of any reason as an end point, were also analysed and compared to overall results from the Finnish Arthroplasty Register. Results: During the follow-up there were six revisions (13.0%): one of them for primary deep infection, menis-ceal bearing was repeatedly dislocated in one knee. Four conversions to TKA were made because of ongoing lateral osteoarthritis and an average time for revision surgery was 63.8 months (1,5- 120 months). The survivorship calculated at þve years was 90.5% (95%Cl 81.6–99.4; 33 cases at risk), and after eight years 87.6% (95%Cl 77.3–97,9; 19 cases at risk). Follow-up showed no clinical or radiological signs of solution of components.
The angle of tibiofemoral axis was also not altered signiþcantly during this observation period. Conclusions: We conclude that the unicompartmental Oxford arthroplasty is a potential alternative in the treatment of unicompartmental medial osteoarthritic knee. Indications and patient selection should be carefully considered. The survivorship was in accordance with most of the previous series.
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.
