title: [A three dimensional finite element study on stress distribution in maxillary central incisor restored with fiber post].
abstract: OBJECTIVE
  To study the stress changes of maxillary central incisor restored with or without fiber post using three dimensional finite element method, and analysis the role of fiber post in determining the stress distribution in dentin.
  
  
  METHODS
  Three dimensional finite element models of maxillary central incisor with various remaining tooth structure were established by spiral CT, Mimics software and ANSYS software. Test samples were restored with all-ceramic crown and fiber post all-ceramic crown, respectively. The von Mises stress and maximal tensile stress of dentin were recorded.
  
  
  RESULTS
  The stress level in dentin of maxillary central incisor restored with fiber post all-ceramic crown was smaller than that restored with all-ceramic crown, the stress distribution of both were similar.
  
  
  CONCLUSIONS
  The apply of fiber post can reduce the stress level in dentin of maxillary central incisor and decrease the risk of tooth breakage, but not change the stress pattern.
authors.affiliation: Dept. of Stomatology, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510080, China.
authors.forename: Cheng-rong
authors.initials: CR
authors.lastname: Kang
authors.forename: Su-hua
authors.initials: SH
authors.lastname: Wei
authors.forename: Mei-chao
authors.initials: MC
authors.lastname: Zhang
authors.forename: Xin-chun
authors.initials: XC
authors.lastname: Zhang
mesh_terms: D003776:Dental Porcelain; D003804:Dentin; D020342:Finite Element Analysis; D006801:Humans; D007180:Incisor; D011176:Post and Core Technique; D019553:Tooth, Nonvital
chemical_list: D003776:Dental Porcelain