Fig. 3From: Differences between native and prosthetic knees in terms of cross-sectional morphology of the femoral trochlea: a study based on three-dimensional models and virtual total knee arthroplastyDefinition of parameters characterizing the cross-sectional morphology of the femoral trochlea (transverse plane) in three-dimensional models of the native (a) and prosthetic knee (b). The lateral tilt angle (α) could be calculated as arctan (h1/w1), while the medial tilt angle (β) could be calculated as arctan (h2/w2)Back to article page