title: [The relationship between age-related stress distribution and fracture incidence of the mandible].
abstract: OBJECTIVE
  To analyze age-related mandible stress distribution due to midline force.
  
  
  METHODS
  Mandibles of children, adults, and elderly individuals were scanned by spiral CT to establish three-dimension imaging models with mesh elements by MIMICS software and HYPERMESH software. The mandible stress distribution was analyzed using ANSIS software.
  
  
  RESULTS
  There was no significant difference in mandible stress distribution in various age groups with the greatest stress distribution (Von Mises) present at the mandible angle. Although there was stress present at the mandible neck in adults, no such mandible neck stress was found in children and elderly individuals.
  
  
  CONCLUSIONS
  Mandible stress distribution is closely related to the incidence of fracture in various age groups, i.e., more stress and more fracture.
authors.affiliation: Zhenjiang Municipal Public Security Bureau, Zhenjiang 212001, China.
authors.forename: Chao-Yong
authors.initials: CY
authors.lastname: Zou
authors.forename: Jin
authors.initials: J
authors.lastname: Xu
authors.forename: Ping
authors.initials: P
authors.lastname: Jiang
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001696:Biomechanical Phenomena; D002648:Child; D020342:Finite Element Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D015994:Incidence; D008334:Mandible / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000502:physiology*; D008337:Mandibular Fractures / Q000209:etiology*; D008875:Middle Aged; D008953:Models, Anatomic; D013314:Stress, Mechanical; D014057:Tomography, X-Ray Computed / Q000379:methods; D055815:Young Adult