Objective To simulate the optimal boundary conditions with the utilization of finite element,and to explore biomechanics of human femur during gait. Methods Volunteer's femoral CT data was extracted before three- dimensional reconstruction and meshing. A computer simulation software,Anybody,was used to simulate the normal movements during gait and export the muscle force exerted on femur during the activity. Geomagic studio and Hypermesh were used to match the coordinates between the target model and the mo...