Surface characteristics of a modified acidulated phosphate fluoride gel with nano-hydroxyapatite coating applied on bovine enamel subjected to an erosive environment.

Soares, Luís Eduardo Silva; da Silva Magalhães, Juarez; Marciano, Fernanda Roberta; Lobo, Anderson Oliveira

Soares, Luís Eduardo Silva; da Silva Magalhães, Juarez; Marciano, Fernanda Roberta; Lobo, Anderson Oliveira.

Afiliação

Soares LES; Laboratory of Dentistry and Applied Materials (LDAM), Research and Development Institute (IP&D), Universidade do Vale do Paraíba, São José dos Campos, São Paulo, Brazil.
da Silva Magalhães J; Laboratory of Dentistry and Applied Materials (LDAM), Research and Development Institute (IP&D), Universidade do Vale do Paraíba, São José dos Campos, São Paulo, Brazil.
Marciano FR; Institute of Science and Technology, Universidade Brasil, Itaquera São Paulo, Brazil.
Lobo AO; LIMAV-Interdisciplinary Laboratory of Advanced Materials. PPGCM-Materials Science and Engineering graduate program, Center of Technology, UFPI-Federal University of Piaui, Teresina, Piauí, Brazil.

Microsc Res Tech ; 81(12): 1456-1466, 2018 Dec.

Article em En | MEDLINE | ID: mdl-30295365

RESUMO

This study evaluated the antierosive effect applying a modified acidulated phosphate fluoride (APF) gel containing nano-hydroxyapatite (nHAp) on the enamel surface before erosion. After polishing, the exposed flat enamel surfaces (n = 7/group) from bovine incisors were treated with artificial saliva (S - negative control), orange juice (ERO), APF gel (positive control) and APF_nHAp gel. All samples were subjected to six cycles of demineralization (orange juice, pH ~ 3.5, 10 min) followed by remineralization (saliva, 37°C, 1 hr). The enamel surface morphology, topography, and inorganic composition were analyzed using scanning electron microscopy, roughness testing, and micro energy-dispersive X-ray fluorescence spectrometry, respectively. The mean (standard deviation) roughness values (Ra, µm) were S, 0.13 (0.05); ERO, 0.25 (0.07); APF, 0.22 (0.08); and APF_nHAp, 0.17 (0.04). Ra values were significantly higher after ERO (p < .01) and APF (p < .05) treatments than after S. The enamel surface morphology was altered by the treatments, except for the S specimens. The mineral content of the enamel showed a clear trend with Ca and P reduction in the order of APF < S < APF_nHAp < ERO and APF < S < ERO < APF_nHAp, respectively. We can conclude that APF gel increased mineral concentration on the enamel. Moreover, the APF_nHAp material modified the composition and morphology of the enamel surface.

Assuntos

Fluoreto de Fosfato Acidulado/administração & dosagem; Esmalte Dentário/efeitos dos fármacos; Durapatita/administração & dosagem; Erosão Dentária/prevenção & controle; Fluoreto de Fosfato Acidulado/química; Animais; Bovinos; Esmalte Dentário/metabolismo; Esmalte Dentário/ultraestrutura; Durapatita/química; Géis/administração & dosagem; Géis/química; Humanos; Microscopia Eletrônica de Varredura; Minerais/metabolismo; Desmineralização do Dente/metabolismo; Desmineralização do Dente/prevenção & controle; Erosão Dentária/metabolismo

Palavras-chave

enamel; energy dispersive X-ray fluorescence spectrometry; fluoride; hydroxyapatite; scanning electron microscopy

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Erosão Dentária / Fluoreto de Fosfato Acidulado / Durapatita / Esmalte Dentário Limite: Animals / Humans Idioma: En Revista: Microsc Res Tech Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

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