Use of patient-specific musuloskeletal models to relate subjective and objective outcome scores of acl injured patients

Patient reported outcome measures (PROMs) often greatly improve after ACL reconstruction while biomechanical factors remain similar between the deficient and reconstructed states [1]. This suggests a discrepancy between the two approaches and how they describe a patient’s knee joint function. This discrepancy could be due the superficial nature of the chosen objective measures and that deeper, higher-level measures obtained through musculoskeletal modelling could consolidate subjective and objective scores to a greater degree. To do so requires patient-specific knee joint models and highly accurate tibiofemoral kinematics, previously only obtainable with invasive methods. We therefore developed a ptatient-specific MRI-based knee joint contact model to addres these limitations. The purpose of this study was to apply our novel methods to determine if knee ligament and joint contact forces during a hopping task were correlated to subjective functional scores.