Dynamic simulation and finite element analysis of gunshot wounds to the center of mandible mental region in human
10.3724/sp.j.1008.2011.00845
- Author:
Zhen TANG
1
Author Information
1. Department of Oraland Maxillofacial Surgery, Xinqiao Hospital, Third Military Medical University
- Publication Type:Journal Article
- Keywords:
Biomechanic;
Finite element analysis;
Mandible;
Numerical simulation;
Wound ballistics
- From:
Academic Journal of Second Military Medical University
2011;32(8):845-850
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To establish a finite element model of gunshot wound on the maxillofacial region in human, and to Conduct dynamic simulation and analysis of the injury process and degree of gunshot wounds to the center of mandible mental region, so as to explore a new method for establishing a gunshot wound model of human mandible. Methods: Based on the existing modeling method and internal parameters, digital CT scan data of human mandible were used to establish a three-dimensional finite element model of human mandible, which was used to dynamically simulate the process of gunshot wounds to the center of mandible mental region under different shot conditions. The residual velocities of the shootings with different projectiles at different entry angles and different impact velocities were calculated; the energy loss of the projectile and therate of energy loss after exiting the mandible were also calculated; and the obtained data were compared and analyzed. Results: The dynamic processes of gunshot wounds to the center of mandible mental region with two projectiles, three impact velocities, and three entry angles were successfully simulated. Meanwhile, thes imulation was also done for the stress distribution in different parts of mandible after injury. Computation and the analysis of the modeling data showed that these verity of injuries and the injury efficiency of projectiles differed with different injury conditions. Conclusion: Finite element model can dynamically simulate the injury process of gunshot wounds to the center of mandible mental region. It is found that the injury severity on mandible and the injury efficiency vary under different injury conditions. The finite element model is a potentially ideal model for studying the maxillofacial gunshot wounds.
