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Stress distribution in the cervical region of an upper central incisor in a 3D finite element model
Poiate, Isis Andréa Venturini Pola; Vasconcellos, Adalberto Bastos de; Poiate Junior, Edgard; Dias, Kátia Regina Hostílio Cervantes.
Afiliação
  • Poiate, Isis Andréa Venturini Pola; University of São Paulo. Physics Institute. Department of General Physics. São Paulo. BR
  • Vasconcellos, Adalberto Bastos de; Fluminense Federal University. School of Dentistry. Department of Operative Dentistry. Nova Friburgo. BR
  • Poiate Junior, Edgard; University of São Paulo. Polytechnic School of Engineering. Department of Mining and Petroleum Engineering. São Paulo. BR
  • Dias, Kátia Regina Hostílio Cervantes; State University of Rio de Janeiro. School of Dentistry. Department of Dental Clinic. Rio de Janeiro. BR
Braz. oral res ; 23(2): 161-168, 2009. ilus, tab
Artigo em Inglês | LILACS | ID: lil-522297
Biblioteca responsável: BR1.1
ABSTRACT
The aim of this study was to evaluate the stress distribution in the cervical region of a sound upper central incisor in two clinical situations, standard and maximum masticatory forces, by means of a 3D model with the highest possible level of fidelity to the anatomic dimensions. Two models with 331,887 linear tetrahedral elements that represent a sound upper central incisor with periodontal ligament, cortical and trabecular bones were loaded at 45º in relation to the tooth's long axis. All structures were considered to be homogeneous and isotropic, with the exception of the enamel (anisotropic). A standard masticatory force (100 N) was simulated on one of the models, while on the other one a maximum masticatory force was simulated (235.9 N). The software used were PATRAN for pre- and post-processing and Nastran for processing. In the cementoenamel junction area, tensile forces reached 14.7 MPa in the 100 N model, and 40.2 MPa in the 235.9 N model, exceeding the enamel's tensile strength (16.7 MPa). The fact that the stress concentration in the amelodentinal junction exceeded the enamel's tensile strength under simulated conditions of maximum masticatory force suggests the possibility of the occurrence of non-carious cervical lesions such as abfractions.
Assuntos

Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Força de Mordida / Colo do Dente / Análise de Elementos Finitos / Imageamento Tridimensional / Análise do Estresse Dentário / Incisivo Tipo de estudo: Estudo prognóstico Limite: Humanos Idioma: Inglês Revista: Braz. oral res Assunto da revista: Odontologia Ano de publicação: 2009 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: Fluminense Federal University/BR / State University of Rio de Janeiro/BR / University of São Paulo/BR
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Força de Mordida / Colo do Dente / Análise de Elementos Finitos / Imageamento Tridimensional / Análise do Estresse Dentário / Incisivo Tipo de estudo: Estudo prognóstico Limite: Humanos Idioma: Inglês Revista: Braz. oral res Assunto da revista: Odontologia Ano de publicação: 2009 Tipo de documento: Artigo País de afiliação: Brasil Instituição/País de afiliação: Fluminense Federal University/BR / State University of Rio de Janeiro/BR / University of São Paulo/BR
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