West China Journal of Stomatology

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Study of three- dimensional model on biomechanical character istics of mandibular fr actures in different site

LIU Chun- li1, WU An- ping1, PIAO Zheng- guo1, WU Hong2, PENG Tie- nan1, LIU Lei2   

  1. 1. Dept. of Oral and Maxillofacial Surgery, College of Stomatology, Jilin University, Changchun 130000, China; 2. College of Mechanical Engineering, Jilin University, Changchun 130022, China
  • Received:2007-08-25 Revised:2007-08-25 Online:2007-08-20 Published:2007-08-20
  • Contact: LIU Chun- li,Tel:13596043595

Abstract:

Objective To determine the biomechanical characteristics of mandibular fractures in different site. Methods Nine adult mandibular specimens were measured precisely. The data was used to establish a three - dimensional model. When mandibular was under functional loading, the bending and torsion moment as well as shear force of angle, body and symphyseal fracture was calculated. The data were analyzed by Origin 6.0 software. Results Angle fracture had relatively high positive bending moment and high shear force. Body fracture had positive as well as negative bending moment and the highest torsion moments. Symphyseal fracture had only negative bending moment and relatively low shear force. Conclusion Angle, body and symphyseal fractures each have a biomechanics characteristic. These biomechanics characteristic should have an important meaning in the treatment of mandibular fractures and instructing patient how to bite correctly.

Key words: mandibular fractures, biomechanics, three- dimensional model