Evaluation of the Effect of the Sulcus Angle and Lateral to Medial Facet Ratio of the Patellar Groove on Patella Tracking in Aging Subjects with Stable Knee Joint

Figure 1

Illustration of the marked area (zone of deeper green) on the femoral head. A sphere is generated to fit the marked area, and its center (green ball) is set as the center of the femoral head.