Editorial Commentary: The Entry Point-Trochlear Groove Angle Measures Lateralization of the Proximal Trochlear Entry Point in Patients With Patellar Instability.

Patellar instability is a complex orthopaedic condition, occurring at an incidence of 23.2 per 100,000 person-years and resulting from a combination of osseous and soft-tissue factors. Osseous abnormalities associated with patellar instability include trochlear dysplasia and a lateralized tibial tubercle.