Fig. 4From: Large flexion contracture angle predicts tight extension gap during navigational posterior stabilized-type total knee arthroplasty with the pre-cut technique: a retrospective studyThreshold FCA for a tight EG. The calculated cut-off value (15.0°) had a sensitivity of 85% and a specificity of 78%. AUC area under the curve, FCA flexion contracture angle, EG extension gapBack to article page