Association and impact of patellofemoral dysplasia on patellofemoral arthropathy and arthroplasty

Stacked sparse autoencoder networks and statistical shape models for automatic staging of distal femur trochlear dysplasia

“…Even landmark‐based quantifications are susceptible to interobserver interpretation . In addition, the evaluation of high‐grade anomalies, local to the trochlear region, can be inconclusive to the selection of the specific surgical techniques in trochleoplasty, and the selection between onlay and inlay implants is mainly dictated by surgeon skills …”

“…Therefore, innovative techniques able to visualize and quantify the trochlear morphology and its pathologic variability can be considered valuable tools supporting the physicians in the staging and in the choice of the correct therapeutic approach. Furthermore, quantitative morphometric data could help in the choice of specific procedures, associated to both trochleoplasty and total knee replacement, such as patellar translation or ligament release . In light of these considerations, the clinical contributions of the paper can be summarized as follows.…”

“…The dysplasia of the trochlear region is a well‐acknowledged clinical condition of the distal femur that makes the knee prone to mechanical instability and patellar dislocation, contributing to early degenerative changes of the cartilage . In case of severe trochlear abnormalities and according to the osteoarthritis grade, trochleoplasty and even total knee replacement constitute viable therapeutic procedures for the patient . Nonetheless, the correct diagnostic staging and the choice between conservative and surgical treatments remain controversial because of the complexity of trochlear shape .…”

“…[1][2][3] In case of severe trochlear abnormalities and according to the osteoarthritis grade, trochleoplasty and even total knee replacement constitute viable therapeutic procedures for the patient. [4][5][6] Nonetheless, the correct diagnostic staging and the choice between conservative and surgical treatments remain controversial because of the complexity of trochlear shape. [7][8][9] The traditional approach to stage trochlear dysplasia is based on Dejour classification, which comprises four grades (A, B, C, and D) of increasing severity.…”

Patient-specific modeling of the trochlear morphologic anomalies by means of hyperbolic paraboloids

“…[4,5] From a surgical point of view, the extent of the morphologic variations is determinant for the selection of the optimal implant in trochleoplasty interventions. [6][7][8][9][10] Evaluating the morphologic deviations to normality is however complicated by the fact that the three-dimensional (3D) geometric profile of the trochlea is extremely complex and sensibly varies amongst individuals. [11][12][13] One of the most applied clinical approach to score the morphologic anomalies of the trochlear surface (TS) is based on the Dejour classification, which encompasses four different qualitative Grades (A, B, C, D) of increasing severity.…”