BACKGROUND Total patellectomy is currently reserved for exceptional cases,such as recalcitrant patellofemoral instability and comminuted fractures,due to its demonstrated negative impact on knee biomechanics.Therefore...
Patellofemoral instability(PI)is the disruption of the patella’s relationship with the trochlear groove as a result of abnormal movement of the patella.To identify the presence of PI,conventional radiographs(anteropo...