Preventive effect of an iron varnish on bovine enamel erosion in vitro

Kato, Melissa Thiemi; de Moraes Italiani, Flávia; de Araújo, Juliana Julianelli; Garcia, Marina Duarte; de Carvalho Sales-Peres, Sílvia Helena; Buzalaf, Marília Afonso Rabelo

doi:10.1016/j.jdent.2008.11.019

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Volume 37, Issue 3 , Pages 233-236, March 2009

Preventive effect of an iron varnish on bovine enamel erosion in vitro

Melissa Thiemi Kato
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75 Bauru-SP 17012-901, Brazil
Flávia de Moraes Italiani
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75 Bauru-SP 17012-901, Brazil
Juliana Julianelli de Araújo
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75 Bauru-SP 17012-901, Brazil
Marina Duarte Garcia
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75 Bauru-SP 17012-901, Brazil
Sílvia Helena de Carvalho Sales-Peres
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75 Bauru-SP 17012-901, Brazil
Marília Afonso Rabelo Buzalaf
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Al. Octávio Pinheiro Brisolla, 9-75 Bauru-SP 17012-901, Brazil
- Corresponding author. Tel.: +55 14 32358346; fax: +55 14 32271486.

Received 7 November 2008; received in revised form 24 November 2008; accepted 26 November 2008.

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, 10mmol/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^® (10min, 30mL/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±0.018μm) when compared to the other treatments. The FV caused significantly less wear (0.554±0.022μm) when compared to PV (0.991±0.039μm) and NT (1.014±0.033), which did not significantly differ from each other.