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A Novel Dentin Push-out Bond Strength Model That Uses Micro-Computed Tomography.
Brito-Júnior, Manoel; Leoni, Graziela Bianchi; Pereira, Rodrigo Dantas; Faria-e-Silva, André Luis; Gomes, Erica Alves; Silva-Sousa, Yara Teresinha; Sousa-Neto, Manoel Damião.
Afiliação
  • Brito-Júnior M; Department of Dentistry, State University of Montes Claros-Unimontes, Montes Claros, Minas Gerais, Brazil.
  • Leoni GB; Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.
  • Pereira RD; Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.
  • Faria-e-Silva AL; Department of Dentistry, School of Dentistry, Federal University of Sergipe, Aracaju, Sergipe, Brazil.
  • Gomes EA; Faculty of Dentistry, University of Ribeirão Preto-UNAERP, Ribeirão Preto, São Paulo, Brazil.
  • Silva-Sousa YT; Faculty of Dentistry, University of Ribeirão Preto-UNAERP, Ribeirão Preto, São Paulo, Brazil.
  • Sousa-Neto MD; Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil. Electronic address: sousanet@forp.usp.br.
J Endod ; 41(12): 2058-63, 2015 Dec.
Article em En | MEDLINE | ID: mdl-26602449
INTRODUCTION: Current push-out experimental methods used in endodontic research should be improved. This study introduced a novel dentin push-out bond strength model that uses micro-computed tomography (µCT). METHODS: Roots filled with gutta-percha cones and different resin-based sealers (n = 10) were sectioned transversely to obtain two 2-mm-thick slices per root third. The first slice was subjected to a push-out test by using a material testing stage fitted inside a µCT scanner. The apparatus was scanned before and after the test to evaluate areas of filling material ruptures. The images provided by µCT were also used to generate models for a 3-dimensional finite element analysis. Confocal laser scanning microscopy was used to assess failure modes after the test and to measure interfacial gaps in slices not subjected to push-out. Bond-strength and gap data were statistically analyzed (P < .05). RESULTS: Proper coefficients of variation (average less than 30%) were observed for all the experimental conditions. The finite element analysis helped explain the results of bond strength and root-filling ruptures. A significant, moderate, indirect correlation was observed between the bond strength and gaps. CONCLUSIONS: The micromechanical model with the µCT images resulted in a consistent root-filling bond strength evaluation.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Teste de Materiais / Dentina / Microtomografia por Raio-X / Guta-Percha Limite: Humans Idioma: En Revista: J Endod Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Teste de Materiais / Dentina / Microtomografia por Raio-X / Guta-Percha Limite: Humans Idioma: En Revista: J Endod Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos