Knee Adduction Moment and Medial Contact Force – Facts about Their Correlation during Gait

• DOI: 10.1371/journal.pone.0081036
• Publication Date: 2013-12-02T21:54:08Z
• Authors: Ines Kutzner; Adam Trepczynski; Markus O. Heller; Georg Bergmann
• Keywords: Inverse dynamics; Ground reaction force; Contact force; Force platform; Biomechanics

The external knee adduction moment is considered a surrogate measure for the medial tibiofemoral contact force and commonly used to quantify load reducing effect of orthopedic interventions. However, only limited controversial data exist about correlation between force. objective this study was examine whether indeed strong predictor by determining their during gait. Instrumented implants with telemetric transmission were forces in nine subjects. Gait analyses performed simultaneously joint measurements. Skeletal kinematics, as well ground reaction inertial parameters, inputs an inverse dynamics approach calculate moment. Linear regression analysis analyze whole stance phase separately early late phase. Whereas moderate correlations observed throughout (R2 = 0.56) 0.51), high at 0.76). Furthermore, highly correlated ratio 0.75). These results suggest that measure, well-suited predicting or particularly phase, inter-individual variations revealed predictive value limited. Further are necessary combination other kinematic, kinetic neuromuscular factors may lead more reliable prediction magnitude.