Skull System Study Of Mechanical Virtual Human Of China And Its Applications Of Maxillofacial Bone Defects

Due to the variability, diversity of human musculoskeletal system and limitation of experiment condition in vivo, it is very difficult to develop researches on human body mechanical characteristics. At the same time, with improvement of medical condition, different clinical surgical methods occur, how to evaluate postoperative effect of these methods, becomes to an important task for relative medical scholars.This paper is based on the key project"mechanical virtual human of China"supported by National Natural Science Foundation, and three projects cooperated with Ninth People's Hospital. Firstly, the 3D geometrical model and mechanical model of skull system were built. Then, cooperated with clinical cases, it was applied into maxillofacial surgical fields, to study and evaluate the different repair methods bio-mechanically.In this paper, to research the biomechanical characteristics of human skull under the boundary conditions, the muscle force, bite force and joint force in the physiological status during masticatory period, a skull system are built. With the NDI motion capture system, motion data were obtained, inputted into the motion simulation. With 3D motion simulation and muscle force prediction algorithm, boundary conditions were defined. FEA of the natural maxillofacial bones under these boundary conditions at 6 phases during masticatory period, was calculated. Furthermore, under the same boundary conditions, three types of maxillofacial repair methods(bone graft, zygamic implant and prosthesis repair)were remodel and the stress states of which were also calculated.