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  • Title: Preventive effect of an iron varnish on bovine enamel erosion in vitro.
    Author: Kato MT, de Moraes Italiani F, de Araújo JJ, Garcia MD, de Carvalho Sales-Peres SH, Buzalaf MA.
    Journal: J Dent; 2009 Mar; 37(3):233-6. PubMed ID: 19131151.
    Abstract:
    OBJECTIVE: The aim of this study was to evaluate, in vitro, the effect of an experimental varnish containing iron on the dissolution of bovine enamel by carbonated beverage. METHODS: Eighty specimens were randomly allocated to four groups (n=20 per group), according to the following treatments: Fe varnish (FeV, 10 mmol/L Fe), F varnish (FV, 2.71% F), placebo varnish (PV) and control (not treated, NT). The varnishes were applied in a thin layer and removed after 6h. Then, the samples were submitted to six cycles, alternating re- and demineralisation (only 1 day). Demineralisation was performed with the beverage Coca-Cola (10 min, 30 mL/block) and remineralisation with artificial saliva for 1h. In order to determine the amount of enamel dissolved, the wear was analysed by profilometry. Data were analysed by ANOVA and Tukey's test (p<0.05). RESULTS: The mean wear (+/-S.E.) was significantly lesser for the FeV (0.451+/-0.018 microm) when compared to the other treatments. The FV caused significantly less wear (0.554+/-0.022 microm) when compared to PV (0.991+/-0.039 microm) and NT (1.014+/-0.033), which did not significantly differ from each other. CONCLUSIONS: The results suggest that the iron varnish can interfere with the dissolution of dental enamel in the presence of acidic beverages.
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