title: Estimation of bone-on-bone contact forces in the tibiofemoral joint during walking.
abstract: In this study, the tibiofemoral contact forces were estimated from standard gait analysis data of adult walking. Knee angles, ground reaction forces, and external flexion-extension knee moments together with lines of action and moment arms of the force bearing structures in the knee previously determined were used to obtain bone-on-bone contact forces. The heel strike, the onset of single limb stance and terminal extension before toe-off each corresponded to a significant turning point on the force versus gait cycle curve. The tibiofemoral bone-on-bone peak forces calculated reached an estimated three times bodyweight. The estimated joint loads are clinically relevant and can either be used directly for evaluation of subjects in a gait analysis, or indirectly in studies of the knee joint where models simulating loading conditions are used to investigate various pathologies.
authors.affiliation: Musculoskeletal Research Laboratories, Department of Orthopaedic Surgery, National University of Singapore, Singapore. ashvin@nus.edu.sg
authors.forename: Ashvin
authors.initials: A
authors.lastname: Thambyah
authors.forename: Barry P
authors.initials: BP
authors.lastname: Pereira
authors.forename: Urs
authors.initials: U
authors.lastname: Wyss
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005269:Femur / Q000502:physiology*; D005684:Gait / Q000502:physiology; D006801:Humans; D007719:Knee Joint / Q000502:physiology; D008954:Models, Biological; D013710:Tendons / Q000502:physiology; D013977:Tibia / Q000502:physiology*; D016138:Walking / Q000502:physiology*