Relationship between the Patellar Ridge and the Femoral Trochlea in the Patellar Tracking.

Objective: To investigate the anatomic morphology of the patellar ridge and how it matches the femoral trochlea in patellar tracking.

Method: We selected 40 volunteers, 20 males (age, 28 ± 5 years) and 20 female (age, 27 ± 6 years), who were completely asymptomatic with normal knee structures. We measured the right or left legs of volunteers, and the region from the distal femur to the tibial tuberosity was scanned by computed tomography (CT) with flexion at 0°, 30°, 60°, and 90°.