A novel knee joint model in FEBio with inhomogeneous fibril-reinforced biphasic cartilage simulating tissue mechanical responses during gait: data from the osteoarthritis initiative.
Alexander Paz, Gustavo A Orozco, Petri Tanska, José J García, Rami K Korhonen, Mika E Mononen
Author Information
Alexander Paz: Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.
Gustavo A Orozco: Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.
Petri Tanska: Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.
José J García: Escuela de Ingeniería Civil y Geomática, Universidad del Valle, Cali, Colombia.
Rami K Korhonen: Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.
Mika E Mononen: Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.
We developed a novel knee joint model in FEBio to simulate walking. Knee cartilage was modeled using a fibril-reinforced biphasic (FRB) formulation with depth-wise collagen architecture and split-lines to account for cartilage structure. Under axial compression, the knee model with FRB cartilage yielded contact pressures, similar to reported experimental data. Furthermore, gait analysis with FRB cartilage simulated spatial and temporal trends in cartilage fluid pressures, stresses, and strains, comparable to those of a fibril-reinforced poroviscoelastic (FRPVE) material in Abaqus. This knee joint model in FEBio could be used for further studies of knee disorders using physiologically relevant loading.
