8th Biennial ISAKOS Congress • Rio De Janeiro, Brazil • May 15-19, 2011 Patellofemoral Research Excellence Award The Geometry and Function of the Patellofemoral Joint Farhad Iranpour, United Kingdom The purpose of this study was to explore the patellofemoral joint in 3 dimensions, looking at its geometry, motion and stability. Abstract: Purpose: The purpose of this study was to explore the patellofemoral joint in 3 dimensions, looking at its geometry, motion and stability. This work aimed to establish a relationship between this joint and the tibio-femoral joint. Method: CT scans of 40 normal knees were analysed using custom designed 3D imaging software. A frame of reference was defined, the flexion and extension facets were described in terms of spheres, and the offset of the extension facet sphere centres was measured relative to predefined landmarks. The locations and orientations of the groove and the trochlear axis were examined in relation to the conventional axes of the femur. As for the patella the relationships of various patellar dimensions were studied. In the next part of this study, the [...]