Protective Effect of Fluoride Varnish and Fluoride Gel on Enamel Erosion: Roughness, SEM-EDS, and mu-EDXRF Studies

Autor(es)

Silva Soares, Luis Eduardo ^[1] ; Belfort De Carvalho Filho, Antonio Carlos ^[2]

Afiliação do(s) autor(es)

^[1] Univ Vale do Paraiba, Dent Mat & Operat Dent Dept, Lab Biomed Vibrat Spect, Sch Dent, Res & Dev Inst, UNIVAP, LEVB, BR-12244000 Sao Paulo - Brazil

^[2] Ctr Ensino Unificado Teresina, Teresina, Piaui - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MICROSCOPY RESEARCH AND TECHNIQUE; v. 78, n. 3, p. 240-248, MAR 2015.
• Citações Web of Science: 11

Resumo

ObjectivesThe effects of fluoride treatment on bovine enamel subjected to acid erosion were studied by roughness (Ra) measurements, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and microenergy-dispersive X-ray fluorescence spectrometry (-EDXRF). Materials and MethodEnamel samples (63) were divided into nine groups (n=7): artificial saliva (AS), Pepsi Twist((R)) (PT), orange juice (OJ), Duraphat((R))+Pepsi Twist((R)) (DPH/PT), Duraphat((R))+orange juice (DPH/OJ), Duofluorid((R))+Pepsi Twist((R)) (DUO/PT), Duofluorid((R))+orange juice (DUO/OJ), fluoride gel+Pepsi Twist((R)) (FG/PT), and fluoride gel+orange juice (FG/OJ). Fluoride was applied and the samples were submitted to six cycles (demineralization: Pepsi Twist((R)) or orange juice, 10 min; remineralization: saliva, 1 h). The enamel surface in depth was exposed and 63 line-scan maps were performed. ResultsThe elemental analysis by EDS revealed that only fluoride treated groups had any detectable fluorine after erosion cycles (DPH/PT: 3.50 wt%; DPH/OJ: 3.37 wt%; DUO/PT: 2.69 wt%; DUO/OJ: 3.54 wt%; FG/PT: 2.17 wt%; FG/OJ: 2.77 wt%). PT treatment resulted in significantly higher Ra values than the artificial saliva (P<0.001). Scanning electron microscopy (SEM) analysis of fluoride protected enamel showed areas with some globular structures or a residual layer of varnish. The enamel thickness was significantly lower in PT (0.630.087 mm) than in DPH/PT (0.87 +/- 0.16 mm) and DUO/PT (0.92 +/- 0.14 mm) groups (P<0.01). Clinical RelevanceFluoride treatments protected enamel without Ra increase and loss of enamel tissue. Microsc. Res. Tech. 78:240-248, 2015. (c) 2015 Wiley Periodicals, Inc. (AU)

• Processo FAPESP: 07/07984-5 - Caracterização vibracional, física e mecânica da degradação de compósitos dentais.
• Beneficiário: Luís Eduardo Silva Soares
• Modalidade de apoio: Auxílio à Pesquisa - Regular