Evaluation of fluoride-containing toothpastes in Mexico

The most widely used method for applying fluoride topically is by means of toothpaste since almost all dentifrices contain fluoride. However, the early use of fluoride dentrifice and their use in large quantities have been identified as risk factors for dental fluorosis. Little is known about fluoride dentrifice use as a risk for dental fluorosis. It had been reported that children under 6 years swallow the toothpaste until 95% of the dispensed quantity. In 1993, the Mexican government implemented domestic salt fluoridation at 250 to 300 ppm. The objectives of our study were to know the actual concentration of fluoride in toothpastes sold in the Mexican market. 61 fluoridated toothpastes were analyzed using an Orion 720A potentiometer and an Orion BN 96-09 F ion-specific electrode. Fluoride concentration ranged from 0 to 2053 ppm . Mean fluoride concentration was 718.6±582.1). 55.7% of the analyzed samples had a F concentration from 0 to 878.86 ppm F. Of the analyzed samples, 11.5% were infant toothpastes and F concentration varied from 0 to 1153 ppm . Our results demostrate a wide variation in F concentration, and suggest it is necessary to implement an official policy which regulates F concentration in these products. It is important that all manufactures of dentifrices show in the label the total fluoride content of the product and also should print the recommended dosis, in order to prevent dental fluorosis lesions. This study was supported by a grant of CONACyT # 27615-M.