Published online Jul 18, 2013. doi: 10.5312/wjo.v4.i3.120
Revised: April 23, 2013
Accepted: May 9, 2013
Published online: July 18, 2013
Core tip: Fixed flexion contractures of even 1° have been reported to result in inferior outcomes after total knee arthroplasty. Despite the importance of correcting flexion deformities during surgery, the knee angle is often estimated visually. We developed an intraoperative measurement device that was highly reliable (intraclass correlation coefficient = 0.98) and was able to detect a loss of knee extension with the placement of a 2 mm thicker trial polyethylene liner in 93.8% of cases.