Abstract:
"Subject-SpecificSubject-Specific Finite Element Modeling of the Tibiofemoral Joint Based on CT, Magnetic Resonance Imaging and Dynamic Stereo-Radiography Data in Vivo"
This study presents an advanced, subject-specific finite element (FE) modeling approach for evaluating tibiofemoral joint biomechanics using high-resolution imaging and dynamic motion data. The model integrates computed tomography (CT), magnetic resonance imaging (MRI), and dynamic stereo-radiography (DSX) to reconstruct precise knee geometries and kinematics under in vivo loading conditions. The primary aim was to develop and verify a method for simulating accurate cartilage contact mechanics and ligament force distributions during realistic joint movement. The model incorporates rigid bone representations, nonlinear material properties for soft tissues, and boundary conditions derived from DSX-based motion capture of walking gait cycles. Validation of the FE model against experimental and in vivo data confirmed its predictive accuracy. The simulation results demonstrated region-specific contact stress patterns and ligament tension profiles consistent with physiological expectations. This research emphasizes the power of subject-specific computational biomechanics in evaluating joint function, pathology, and the mechanical consequences of clinical interventions such as surgery or rehabilitation strategies.
