Beard DJ, et al. - The comparative efficacy of Total Knee Replacement (TKR) versus Partial (or Unicompartmental) Replacement (PKR) for medial osteoarthritis was assessed. Findings reported both operations afforded good early outcome and no evidence demonstrated the superiority of TKR over PKR. Data showed that there were differences from several separate outcomes in favour of PKR and, the expertise component was a useful design and emphasised differences. Overall, early results were indicative of superiority of PKR over TKR for medial compartment knee OA at one year.