Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (9): 1566-1569.doi: 10.3969/j.issn.1673-8225.2011.09.012

Previous Articles     Next Articles

Three-dimensional finite element analysis of stress distribution of mandible angle under forces

Wu Ling-Li1, Chen Jun1, Li Zhi-jie2, He Xiang-yi1   

  1. 1Department of Prosthodontics, School of Stomatology, Lanzhou University, Lanzhou  730000, Gansu Province, China
    2Dental Hospital, Northwest University for Nationalities, Lanzhou  730030, Gansu Province, China
  • Received:2010-09-18 Revised:2010-11-05 Online:2011-02-26 Published:2011-02-26
  • Contact: He Xiang-yi, Professor, Master’s supervisor, Department of Prosthodontics, School of Stomatology, Lanzhou University, Lanzhou 730000, Gansu Province, China xiangyihe@yahoo.com.cn
  • About author:Wu Ling-li★, Studying for master’s degree, Department of Prosthodontics, School of Stomatology, Lanzhou University, Lanzhou 730000, Gansu Province, China lili2004825@yahoo.com.cn
  • Supported by:

    the Fundamental Research Funds for the Central Universities, No. lzujbky-2010-142*

PDF

624

Abstract:

BACKGROUND: The studies regarding fracture risk in different parts of the mandible after impact are few. 
OBJECTIVE: To study the condition and characteristics of stress distribution in the mandible, of which forces are applied on mandibular angle by using 3D finite element analysis.
METHODS: The electronic CT images of mandible were scanned and then imported to the Amira software for the fabrication of 3D mandible model. At the angle of 90°, 0° to the middle sagittal plane, 1 000 N forces were applied on the left side of mandibular angle in Ansys software. Thereafter, the condition of stress distribution and Von Mises stress of the weak parts of the mandible were expressed in the 3D mandible model.
RESULTS AND CONCLUSION: 3D model of mandible was established. When force was applied on the left side of mandibular angle in 90° angle, both sides of mandibular angles and condylar necks were easily fractured. The inside surface of central symphysis and the left of mental foramen of mandible may show fissures, while the right of mental foramen was slightly damaged. When force was applied on the left side of inferior border of mandibular angle in 0° angle, both sides of mandibular angles and condylar necks were easily fractured. The inside of central symphysis and the left of mental foramen may showed fissures, while the right of mental foramen slightly damaged. It is revealed that, while forces were applied on the left side of mandibular angle, Von Mises stress mainly concentrated on the weak parts of mandible, which provides theoretical basis for preliminary clinical diagnosis and treatment of mandibular fractures.

CLC Number: