Physically Based Finite Element Model of the Face

Authors:
Giuseppe Barbarino;Mahmood Jabareen;Juergen Trzewik;Edoardo Mazza
Affiliations:
Institute of Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland 8092;Institute of Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland 8092;Johnson & Johnson MEDICAL GmbH, Norderstedt, Germany 22851;Institute of Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland 8092 and EMPA, Swiss Federal Laboratory for Materials Testing & Research, Dü ...
Venue:
ISBMS '08 Proceedings of the 4th international symposium on Biomedical Simulation
Year:
2008

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Abstract

The proposed 3D finite element model of the face aims at a faithful representation of the anatomy, the mechanical interactions between different tissues, and the non linear force deformation characteristics of tissues. Bones and soft tissues were reconstructed from magnetic resonance images. Non linear constitutive equations are implemented in the numerical model. The corresponding model parameters were selected according to previous work with mechanical measurements on soft facial tissue. Model assumptions concerning tissues geometry, mechanical properties and boundary conditions were validated through comparison with measurements of the facial tissue response to gravity loads and to the application of a pressure inside the oral cavity. In particular, parametric studies were carried out in order to quantify the influence of constitutive model parameters of muscles. The model described in this paper might be used for simulation of plastic and reconstructive surgery and for investigation of the physiology and pathology of face deformation.