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Chemical and mechanical resistance of novel experimental hybrid coatings on dentin permeability.
Oliveira, Tatiane Alexandre; Anágua-Bravo, Ernesto; Aoki, Idalina Vieira; Scaramucci, Taís; Sobral, Maria Angela Pita.
Afiliação
  • Oliveira TA; Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
  • Anágua-Bravo E; Department of Chemical Engineering, Polytechnic School, University of São Paulo, São Paulo, SP, Brazil.
  • Aoki IV; Department of Chemical Engineering, Polytechnic School, University of São Paulo, São Paulo, SP, Brazil.
  • Scaramucci T; Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
  • Sobral MAP; Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
Microsc Res Tech ; 84(2): 163-170, 2021 Feb.
Article em En | MEDLINE | ID: mdl-32869428
This study aimed to evaluate the capacity of novel experimental hybrid coatings (HC) to reduce dentin permeability and to verify their resistance to erosive and abrasive challenges. Dentin disc specimens (1 mm thick) were treated with 0.5 M EDTA solution and randomly allocated into three experimental groups (n = 10): Control (Saliva); Concentrated Hybrid Coating (TEOS/GPTMS/Y-APS); and Diluted Hybrid Coating (1:3 ratio with distilled water). Dentin permeability was assessed by hydraulic conductance in the following experimental time periods: post-EDTA, post treatment, post erosion (5 min in 0.05 M citric acid solution, pH = 3.8), and post abrasion (toothbrushing for 3,900 cycles). Dentin permeability percent was calculated with respect the values of post-EDTA for each experimental time. The morphology of the surface of extra dentin specimens was examined by scanning electron microscopy (SEM) in the same time periods (n = 3). Permeability data were analyzed by two-way repeated measures ANOVA and Tukey tests (p < .05). Both HC presented significantly lower dentin permeability than control post treatment and post erosion (p < .05), without difference between them (p > .05). Post abrasion, there were no significant difference among groups (p > .05). Post treatment and post erosion, the HC seemed to flow into the tubules, occluding them, while the tubules in control remained opened. Post abrasion, the tubules appear to be occluded in all groups. In conclusion, the experimental hybrid coatings were capable of reducing dentin permeability after treatment. They were also able to resist to erosive and abrasive challenges, with the advantage of forming thinner and colorless films that can be potentially used to treat dentin hypersensitivity.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Erosão Dentária / Escovação Dentária / Teste de Materiais / Ácido Cítrico / Permeabilidade da Dentina / Sensibilidade da Dentina Tipo de estudo: Clinical_trials / Evaluation_studies Limite: Humans Idioma: En Revista: Microsc Res Tech Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Erosão Dentária / Escovação Dentária / Teste de Materiais / Ácido Cítrico / Permeabilidade da Dentina / Sensibilidade da Dentina Tipo de estudo: Clinical_trials / Evaluation_studies Limite: Humans Idioma: En Revista: Microsc Res Tech Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos