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  • Title: Brushing abrasion of eroded bovine enamel pretreated with topical fluorides.
    Author: Vieira A, Lugtenborg M, Ruben JL, Huysmans MC.
    Journal: Caries Res; 2006; 40(3):224-30. PubMed ID: 16707871.
    Abstract:
    Topical fluorides have been proposed for the prevention of erosive dental wear. This study evaluated the in vitro effect of a single professional application of 4% titanium tetrafluoride (TiF4), 1% amine fluoride (AmF) and 0.1% difluorosilane varnish (FV) in preventing wear due to combined erosion and brushing abrasion. One hundred and eight bovine enamel samples were used. Control groups were not pretreated with any product (C), pretreated with a fluoride-free varnish (FV-bl) or pretreated with fluoride varnish and subsequently submitted to varnish removal (FV-r). Wear was modeled by submitting the fluoride-treated and control groups to 3 cycles of the following regimens: erosion/remineralization (er/remin), abrasion/remineralization (abr/remin) or erosion/abrasion/remineralization (er/abr/remin). Erosion was simulated by immersion of the samples for 10 min in citric acid 50 mM (pH 3). Abrasion was carried out for 1 min (200 strokes, load 150 g) in a wear device. Remineralization (2 h artificial saliva) took place between the cycles. Two-way ANOVA showed that there was a significant interaction (p<or=0.001) between the fluoride treatments and the wear regimens. Under er/remin a significant wear protective effect was found for the FV, FV-r and FV-bl groups. Abr/remin resulted in some enamel loss for the TiF4 and AmF groups, but the amounts lost were not statistically significant (p=0.185 and p=1.000, respectively). Under er/abr/remin all products showed a significant protective effect, except for TiF4. It was concluded that FV and AmF protected bovine enamel against erosion followed by brushing abrasion in vitro.
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