Abstract Summary
Rupture of the anterior cruciate ligament (ACL) leads to complex knee joint translation and rotation differences that are theorized to contribute to the development of post-traumatic osteoarthritis (PTOA). The finite helical axis (FHA) is a powerful approach to describe post-traumatic alterations in knee joint mechanics. Using high-speed biplanar video-radiography (HSBV) and FHA approaches, this study identified distinct differences in FHA parameters between individuals who are ACL deficient (ACLD) and those that are ACL intact.