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. 2006 Apr;14(2):88-92.
doi: 10.1590/s1678-77572006000200005.

Effect of fluoridated varnish and silver diamine fluoride solution on enamel demineralization: pH-cycling study

Alberto Carlos Botazzo Delbem  1 , Maurício Bergamaschi, Kikue Takebayashi Sassaki, Robson Frederico Cunha
Affiliations

Effect of fluoridated varnish and silver diamine fluoride solution on enamel demineralization: pH-cycling study

Alberto Carlos Botazzo Delbem et al. J Appl Oral Sci. 2006 Apr.

Abstract
in English, Portuguese

Objective: In the present investigation, the anticariogenic effect of fluoride released by two products commonly applied in infants was evaluated.

Methods: Bovine sound enamel blocks were randomly allocated to each one of the treatment groups: control (C), varnish (V) and diamine silver fluoride solution (D). The blocks were submitted to pH cycles in an oven at 37 degrees C. Next, surface and cross-sectional microhardness were assessed to calculate the percentage loss of surface microhardness (%SML) and the mineral loss (deltaZ). The fluoride present in enamel was also determined.

Results: F/Px10(-3) (ANOVA, p<0.05) in the 1st layer of enamel before pH-cycling were (C, V and D): 1.61; 21.59 and 3.98. The %SMH (Kruskal-Wallis, p<0.05) were: -64.0, -45.2 and -53.1. %deltaZ values (ANOVA, p<0.05) were: -18.7 feminine, -7.7 and -17.3 feminine.

Conclusion: The data suggested that the fluoride released by varnish showed greater interaction with sound enamel and provided less mineral loss when compared with silver diamine solution.

Objetivos:: Este trabalho avaliou o efeito anticariogênico do flúor liberado por dois produtos comumente aplicados em crianças.

Métodos:: Para isto, utilizaram-se blocos de esmalte de dentes bovinos distribuídos aleatoriamente em três grupos de tratamento: controle (C), verniz fluoretado (V) e solução de diamino fluoreto de prata (D). Os blocos foram submetidos à ciclagem de pH a 37°C. Após, realizou-se o teste de microdureza de superfície (para o cálculo da % da perda de microdureza de superfície - %SML) e em secção longitudinal do esmalte (% de alteração da área mineral - %∆Z) e a determinação do flúor presente no esmalte (F/P x 10-3).

Resultados:: As concentrações de flúor (ANOVA, p<0,05) na 1acamada do esmalte, antes da ciclagem de pH, foram (C, V e D): 1,6a; 21,6be 4,0c. Os resultados de %SML (Kruskal-Wallis, p<0.05) foram: -64,0a, -45,2be -53,1c. Os valores de %∆Z (ANOVA, p<0.05) foram: -18,7a, -7,7be -17,3a.

Conclusão:: Os dados sugerem que o flúor liberado pelo verniz apresentou maior interação com o esmalte promovendo menor perda mineral quando comparado à solução de diamino de prata.

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