Lim JBT, et al. - This study compared complications, re-revision and patient-reported outcome measures (PROMs) at a minimum of two years following revision of unicompartmental knee arthroplasty (UKA) and high tibial osteotomy (HTO) to total knee arthroplasty (TKA). Findings showed that similar post-operative PROMs and satisfaction were achieved with the revision of HTO and UKA, however, compared with revision of HTO, revision of UKA more frequently needed revision components with increased operation duration but fewer complications requiring re-operation.