Patellar dysplasia means an abnormally-shaped patella (kneecap).
This illustration of a cross-section through a dysplastic patella (Wiberg Type 4) shows how the facets may be distorted.
"....there is no consensus as to whether patellofemoral dysplasia is genetic in origin, caused by imbalanced forces producing maltracking and remodelling of the trochlea during infancy and growth, or due to other unknown and unexplored factors...."
"....Patellar dysplasia "is a major predisposing factor for instability of the patellofemoral joint....[but] represents an extremely challenging condition to manage."
Note that when the patella is an abnormal shape the groove of the trochlea mirrors this abnormal.
"....the Wiberg classification of anatomical shape of the patella obtained from radiological data may be a good clinical predictor of the risk of articular cartilage defects and the knee-related physical activity level of the patients...."
Maltracking, Trochlea, Patellar instability, Patellar subluxation, Patellar dislocation, Wiberg classification, Chondral defect, Trochlear dysplasia, Trochlear groove