The purpose of this study is to investigate whether traditional morphometric parameters of the femur trochlear surface are dependable to classify the severity of the trochlear dysplasia. An automatic method to process the distal femur surface is proposed to determine anatomical landmarks and compute morphometric parameters, namely the trochlear depth(TD), the trochlear sulcus angle(SA), the lateral trochlear facet inclination(LFTI), the trochlear facet asymmetry ratio(TFAR) and the ratio between the two (lateral and medial) maximum antero-posterior sizes(CAR) routinately used to quantify trochlear dysplasia. Tests on 11 cadavers and 43 patients, affected by aspecific anterior knee pain, elucidate the role of the parameter cut-off values traditionally used in clinical practice.Purpose
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