mechanisms of patellofemoral pain	Researchers		Thor Besier
			Gary Beaupré
			Scott Delp
			Garry Gold
Patellofemoral pain is a common and painful knee disorder. Despite its' prevalence, we still know little of the aetiology of patellofemoral pain. This project is aimed at understanding the mechanism of pain, testing a hypothesis that pain is related to increased stress in cartilage and subchondral bone. We have developed a finite element modeling framework to estimate cartilage stress in-vivo. Using subject-specific models of the patellofemoral joint, we are testing the hypothesis that people with patellofemoral pain have increased cartilage stress compared to pain free controls.