At the Knee Society meeting on March 13, 2010, in New Orleans, Louisiana, several papers reviewed the outcomes of partial knee replacement, also known as unicompartmental knee replacement. There were excellent outcomes reported both for fixed bearing as well as mobile bearing unicompartmental replacements, as well as good results for patellofemoral replacement. All authors concurred that patient selection and surgical technique are very important in the outcome of unicompartmental replacement. The results are very similar to total knee replacement for the first 10 years, but in some series, unicompartmental replacements have failed at a higher rate after 10 years. Most people have come to the conclusion that partial knee replacements are a suitable option for the younger patient with one-compartment disease as the first of potentially several knee replacement type operations, and in the elderly individual as perhaps the only replacement that will be necessary. Ten percent of patients undergoing knee replacement are candidates for a unicompartmental or partial knee replacement. You can discuss these options with your surgeon.