The survivorship of unicompartmental knee replacements revised to a further unicompartmental replacement

AimTo assess the survivorship of unicompartmental replacements (UKR) revised to UKR. Background: Partial revision of UKR, or revision to a further UKR is a rarely performed procedure with some data from the Australian registry suggesting that results are not good, with early revision being required.MethodAll revision procedures from initial UKR are prospectively followed and scored as part of our department's knee database. We analysed the 37 cases in our database that showed revision of UKR to UKR. These included cases in the following categories: a) Mobile bearing revised to mobile bearing (n=8) b) Mobile bearing revised to fixed bearing (n=20) c) Fixed bearing revised to fixed bearing (n=9)ResultsThe survivorship of revisions of mobile UKR to mobile UKR was 87.5% at a mean of 5 yrs. The survivorship of revisions from mobile UKR to fixed bearing UKR was 95% at a mean of 8 yrs. The survivorship of revisions from fixed bearing UKR to fixed bearing UKR was 78% at 15 yr (1 revised at 9yrs, 1 at 12 yrs).Conc...