Simulation and Visualization of Menisci-Femur Contact Using Patient-Specific Deformable Models

Computational modeling and simulation of knee joint can help expand our understanding of the knee biomechanics, and thus improve orthopedic practice. Although many computational knee models have been developed, very few of them include a deformable menisci model. In addition, patient specific modeling and simulation are still not widely adopted, although they are shown to be more effective than generic modeling. In this paper, we present two new methods for simulating and visualizing menisci-femur contact area during gait cycles, using patient-specific knee models and motion data. Specifically we propose a new template based 3D model reconstruction method that generates patient-specific knee models from medical images. We also propose a new deformable menisci model that combines physics-based deformation and spatial deformation, making it easier for users to balance the physical realism and performance needs. These new methods will benefit knee biomechanical analysis as well as interactive orthopedic surgery planning and training.