Fluoride concentration in the top-selling Brazilian toothpastes purchased at different regions

to be relevant in terms of public health, widely-used toothpastes should have at least 1,000 ppm of soluble fluoride (f) concentration. thus, the concentrations of total fluoride (tf) and total soluble fluoride (tsf) in the top-selling brazilian toothpastes were evaluated. samples (n=3) from toothpastes colgate anti-cáries？, colgate total 12 clean mint？, colgate tripla a？？o menta original？, colgate tripla a？？o menta suave？ and sorriso dentes brancos？ were obtained from each of the five regions of the country. the concentrations of tf and tsf were analyzed with ion-specific electrode calibrated with f standards and the results were expressed in ppm (μg f/g). all toothpastes showed tf concentration lower than 1,500 ppm f (1,388.2 ± 25.8 to 1,483.2 ± 98.2). the tsf values were higher than 1,000 ppm f and ranged from 1,035.5 ± 61.5 to 1,221.8 ± 35.2 for calcium carbonate/monofluorophosphate-based toothpastes and from 1,455.6 ± 12.5 to 1,543.0 ± 147.3 for silica/sodium fluoride-based toothpaste. top-selling brazilian toothpastes presented available fluoride concentration to control caries regardless of the region where they are purchased.