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The dental caries is a multifactorial illness, characterized as a dynamic process, originated from the disequilibrium in the phenomena of demineralization and re-mineralization. Several studies have demonstrated that the prevalence of caries in the majority of the countries have diminished in last the two decades due to implantation of public health programs, to the use of fluorine through the fluoridate water supplying and the consumption of fluoridate dentifrices. The fluoride contained in the dentifrices is capable to R. Ci. med. biol., Salvador, v. 4, n. 3, p. 225-234, set./dez. 2005 233 reduce the mineral loss of the enamel of teeth and to activate the ionic replacement in units with white spots injuries and incipient injuries of caries. This data justify the present study that aimed to determine, in vitro, the human dental enamel protection degree by fluoride; in the forms of sodium fluoride (NaF) and sodium mono-fluoride- phosphate of (MFP), contained in seven dentifrice-test (Colgate Anti-caries Protection (DT1), Trends (DT2), Prevent Anti-placa (DT3), Colgate Anti- tartaro (DT4), Phillips 2 with Fluorine (DT5), Gessy Crystal Jua and Mint (DT6) and Colgate Anti-caries Protection Gel (DT7)) comparativily to the action of the control- dentifrice, without fluoride, Phillips (DC), due to its pH fall to critical levels. The taxes of calcium and phosphate released from the enamel, previously treated by the dentifrices, which had been determined through the technique of spectrometry of atomic emission with plasma connected inductively . The findings had shown the protective power of these products, indicating the appropriate control by the industrial quality. It was also evidenced, greater protection of the enamel for the dentifrices containing the fluoride of sodium in relation to those containing monofluorphosphate of sodium and a negative correlation between the taxes of calcium and phosphate released from the human enamel.

Análise quantitativa da desmineralização do esmalte dental submetido à ação de dentifrícios fluoretados