Fig. 1From: Posterior condylar offset changes and its effect on clinical outcomes after posterior-substituting, fixed-bearing total knee arthroplasty: anterior versus posterior referencingMeasurement of the posterior condylar offset (PCO, a) and posterior condylar offset ratio (PCOR, a/b) based on true lateral preoperative and postoperative knee radiographs. a distance in millimeters from the tangent of the femoral diaphysis posterior cortex to the posterior condylar margin; b distance in millimeters from the posterior condylar border to the tangent of the femoral diaphysis anterior cortexBack to article page