2013 8th International Congress of the Chinese Orthopaedic Association : A randomized controlled trial comparing patient specific instrument with conventional instrument and computer navigation in total knee arthroplasty

78 osteoarthritic and rheumatoid arthritis patients undergoing total knee arthroplasty were randomized to comparatively evaluate the efficacy of conventional instruments (CON), computer navigation (NAV), and patient specific instrument (PSI). The evidence presented in this study indicated that PSI resulted in comparable tourniquet and operation times to those associated with CON. Lower limb alignment achieved in PSI was similar to that of NAV. Further high quality randomized controlled trials, with larger sample sizes are needed to validate the findings of this study.