90 patients undergoing total knee arthroplasty (TKA) with patellar resurfacing were randomized to undergo the procedure with either the conventional technique using intramedullary guides, the conventional technique with extramedullary guides, or using the computer assisted method. The purpose of the RCT was to determine whether there was any difference in functional outcome that resulted from the methodology used to carry out the TKA. The results demonstrated that no significant difference was detectable between the two conventional techniques and computer-assisted TKA over a period of 2 years.