Abstract
Objective To simulate a finite element model for biomechanical analysis of mandible chin blast injury and analyze the mechanism of maxillofacial blast injury. Methods The three-dimensional element model of human mandible blast injury was established to simulate the dynamic process of injury to the mandible chin. Von Mises stress and effective strain were evaluated in biomechanical study of the simulation results. Results The dynamic damage process of human mandible chin blast injury was simulated successfully. In the condition of 1 000 mg and 3 cm, the Von Mises stress and effective were maximum at condylar neck region (9.1×106 Pa, 0.62×10-3e), were second at mandibular angle region (6.1×106 Pa, 0.42×10-3e), and minimum at mental foramen region (6.1×106 Pa, 0.39×10-3e). Blast distance rather than blast equivalent produced more effect on the mechanical parameters and damage degree. Conclusions Von Mises stress and effective strain can be applied to the evaluation of bone tissue damage. The finite element method is effective in simulating mandible blast injury and can provide a new thought and approach to clinical treatment of oral and maxillofacial blast injury. Key words: Mandibular injuries; Finite element analysis; Biomechanics
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