Predicted acl graft stiffness explains variation in increased anterior tibial alignment in acl-reconstructed subjects at 10-12 year follow-up

The results of this study suggest that ACL stiffness predicted from a combination of 3D ACL graft volume and signal intensity explains up to 80% of the variation in anterior tibial position at the time of contact during a one-leg hop-for-distance test in a cohort of ACL-reconstructed patients. This relationship was not observed in the other kinematic variables associated with ACL function: internal ACL tibial rotation, anterior tibial translation and internal rotation excursions.