title: Finite element analysis of stress distribution in intact and porcelain veneer restored teeth.
abstract: The aim of this study was to investigate the stress distribution generated in a veneer restoration of an upper central incisor compared to intact teeth using the finite element analysis after applying a lingual buccal loading at the incisal edge.
  
  
  METHODS
  Two models were developed: one model contained enamel, dentine, cementum, periodontal ligament, cortical and trabecullar bones, and the other model was a veneer restoration; both models were developed using MSC/Nastran software (MacNeal-Schwendler Corporation, Los Angeles, CA, USA) as the pre- and post-processor. A 10-N load was applied at the incisal edge from the lingual to the buccal side to simulate oral conditions in this area (protrusion).
  
  
  RESULTS
  Von Mises stresses were then analysed for three different regions: A-B (enamel elements under the veneer or second enamel layer), A'-B' (buccal enamel and/or veneer element layer) and C-D (lingual enamel elements layer). A higher stress mode was observed for both models at the lingual cervical region.
  
  
  CONCLUSIONS
  The presence of a veneer restoration on the incisors is a good alternative to mimic the behaviour of enamel under protrusion loading conditions. The use of veneers to replace enamel during rehabilitations is recommended.
authors.affiliation: School of Dentistry, Bandeirante University of São Paulo (UNIBAN), Rua Maria Cândida, 1813, Bloco G, 6° andar, 02071-013, São Paulo, SP, Brazil.
authors.forename: M R
authors.initials: MR
authors.lastname: Matson
authors.forename: H R
authors.initials: HR
authors.lastname: Lewgoy
authors.forename: D A
authors.initials: DA
authors.lastname: Barros Filho
authors.forename: R
authors.initials: R
authors.lastname: Amore
authors.forename: A
authors.initials: A
authors.lastname: Anido-Anido
authors.forename: R C B
authors.initials: RC
authors.lastname: Alonso
authors.forename: M R O
authors.initials: MR
authors.lastname: Carrilho
authors.forename: C
authors.initials: C
authors.lastname: Anauate-Netto
mesh_terms: D001732:Bite Force; D003198:Computer Simulation; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000379:methods*; D003801:Dental Veneers; D020342:Finite Element Analysis; D006801:Humans; D007180:Incisor / Q000502:physiology* / Q000601:surgery; D008954:Models, Biological; D013314:Stress, Mechanical
chemical_list: D003776:Dental Porcelain