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.