In situ evaluation on dental enamel remineralization after the use of fluoridated and non-fluoridated toothpaste with or without prophylaxis using sodium bicarbonate under pressure / Avaliação in situ do efeito de dentifrícios com e sem flúor associados ou não à profilaxia profissional com jato de bicarbonato de sódio sobre a remineralização do esmalte dental

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

The aim of this study was to evaluate, in situ, the potencial effect of remineralization after the use of fluoridated and non-fluoridated toothpaste, with or without prophylaxis using the bicarbonate of sodium under pressure, on bovine teeth enamel with artificial external carie lesions. During a crossover study in four phases of ten days, with a seven-day pause, ten volunteers, using acrylic palatal appliances containing two polished bovine enamel slabs (4 x 4 x 2 mm), artificially demineralized in 0,05M lactic solution and 5,0 pH with saturation of 50% (EDB), took part in this study. They brushed their teeth four times a day, after meals, with the dentifrice indicated in each phase with a non-fluoridated dentifrice used in the pause intervals. Slabs enamel surface microhardness was evaluated through Knoop process and, in a charge of 50 g per 7 s, it was divided in three kinds of enamel: healthy (EH), demineralized (ED) and treated (ET) in order to set the retrieval rate of the initial hardness (%rem). They were divided into four different groups: G1 – control – with non-fluoridated toothpaste (DsF); G2 – 1500 ppm MFP fluoridated toothpaste (DF); G3 –nonfluoridated toothpaste, but having a previous prophylaxis with bicarbonate of sodium under pressure (PDsF); and G4 – with fluoridated toothpaste and prophylaxis (PDF). The pairedt test showed that initial microhardness and the final one were different at those four observed phases (p<0,0001). The variance analysis (Kruskal-Wallis, p=2,03 x 10-7) andthe Student-Newman-Keuls Test (p<0,05), set to compare %rem of the 4 groups, showed differences in all of them, excepting in G2 (DF) and G4 (PDF). These data made evident that remineralization occurred in all groups and that the process was stronger in those which made use of fluoridated dentrifice, shown in the rates of %rem indicated by 34,28%; 33,71% 26,80% and 15,49% to the groups G2, G4, G3 and G1, respectively. Professional prophylaxis wasn’t efficient only on the groups that made use of fluoridade dentifrice (%remG4 = %remG2), however, in the fluoride absence, the removal of the bacterial plaque helped to increase the remineralization process.

ASSUNTO(S)

remineralização dentária dentifrício fluorado profilaxia dentária dentifrício

ACESSO AO ARTIGO

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