Surface roughness analysis of a composite treated with fluoridated gel at different pH

Authors

DOI:

https://doi.org/10.22456/2177-0018.99669

Keywords:

Fluorine, Fluorides, Composite resins, Surface properties, Dental caries

Abstract

Aim: Acidulated fluoride is widely used to control dental caries, however, its effects on composites surfaces are controversial. This study aimed to evaluate the surface roughness of a composite after a fluoride topical application in vitro. Methods: Vittra (FGM) composite specimens were made (8mmx1mm) and polished. After pH evaluation of fluoridated products, the ones with the highest and lowest pH were selected for the experiments. Three experimental groups (n = 15) were tested: group 1 - 1.23% acidulated fluoride gel (Nova DFL) (pH: 4.48±0.32), group 2 - 2% neutral fluoride gel (Nova DFL) (pH: 7.03±0.40), group 3 - no fluoride exposure (negative control). The experiment simulated the standard clinical fluoride application protocol (one application of one minute per week,in four weeks). Surface roughness was measured before and after treatment by confocal microscopy and the surface characteristic evaluated by reconstructed images. ANOVA (Bonferroni post-hoc) test was performed to compare means of surface r ughness between groups. Results: The group exposed to acidulated fluoride gel presented the highest values of roughness (Ra: 0.29±0.08), being larger than the group exposed to neutral fluoride gel (Ra: 0.21±0.08) and control (Ra: 0.23±0.05) (p < 0.05), which showed no statistical difference between them. Conclusion: It was concluded that the group exposed to acidulated fluoride showed greater surface roughness than the control group, but this difference appears to be clinically irrelevant. Further studies are needed to assess whether this change increases bacterial adhesion and whether the resin should be polished after topical fluoride applications.

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Published

2020-08-20

How to Cite

Castro, V. T. de, Duarte, M. B. S., & Damé-Teixeira, N. (2020). Surface roughness analysis of a composite treated with fluoridated gel at different pH. Revista Da Faculdade De Odontologia De Porto Alegre, 61(1), 46–58. https://doi.org/10.22456/2177-0018.99669

Issue

Vol. 61 No. 1 (2020)

Section

Original articles

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