Errors in visual estimation of flexion contractures during total knee arthroplasty.

Aim: To quantify and reduce the errors in visual estimation of knee flexion contractures during total knee arthroplasty (TKA).

Methods: This study was divided into two parts: Quantification of error and reduction of error. To quantify error, 3 orthopedic surgeons visually estimated preoperative knee flexion contractures from lateral digital images of 23 patients prior to and after surgical draping.