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Revista da Associacao Paulista de Cirurgioes Dentistas

versão impressa ISSN 0004-5276

Resumo

TREVELIN, Lívia Tosi; SHIMAOKA, Angela Mayumi; CARVALHO, Rubens Côrte Real de  e  ANDRADE, Alessandra Pereira de. Can bioactive agents minimize mineral losses during different bleaching protocols?. Rev. Assoc. Paul. Cir. Dent. [online]. 2014, vol.68, n.4, pp. 338-344. ISSN 0004-5276.

The aim of this study was to evaluate mineral loss caused by different bleaching protocols and the capability of bioactive agents to minimize such dental enamel demineralization processes. Ninety fragments of bovine incisors were divided into 9 groups (n = 10), G1-carbamide peroxide 8h/day (PC), G2-PC + Recaldent, G3-PC + NanoP, G4 PC+NaF, G5 - Peroxide hydrogen 1h/day (PH), G6 - PH + Recaldent, G7-PH+NanoP, G8-PH+NaF, G9 - artificial saliva. Bleaching treatment was performed for 14 consecutive days concurrently with the application of bioactive compounds. The specimens remained in artificial saliva during the consecutive 14 days. The analysis of the mineral content was performed by the method of fluorescence of dental substrate (QLF). The statistical analysis [ANOVA-2way test for repeated measures and the Bonferroni test (p≤5%)] revealed higher mineral losses in G1, G3 and G8; the lowest losses were found in G5, G6 and G7. G2 and G4 groups showed statistical similarities and average mineral loss values were intermediate when compared to the other groups. Front of the methodology and the results we infer that different bleaching protocols entail different mineral loss in the enamel, and the use of carbamide peroxide protocols generated higher demineralization than hydrogen peroxide protocols. Different bioactive compounds present different remineralization potential to demineralization caused by bleaching treatments. The agent containing Recaldent was the most effective to minimize mineral loss caused by tooth whitening.

Palavras-chave : bleaching agents; tooth bleaching; tooth demineralization; tooth remineralization; dental enamel.

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