Laboratory enamel fluoride uptake from fluoride products.

To evaluate the fluoride concentration in enamel after the use of different fluoride products and 48 hours after the cessation of fluoride use. Methods: 16 enamel slabs were divided and treated for 15 days as following: Group A, with an amine fluoride toothpaste and mouthrinse (1400 and 250 mg/L-1, respectively); Group B, with an amine fluoride toothpaste (1400 mg/L-1) and mouthrinse without fluoride; Group C, with a sodium fluoride toothpaste (1400 mg/L-1) and mouthrinse (250 mg/L-1). Chemical biopsy and multiple means were used to determine fluoride concentration. The data were statistically analyzed using the two-way ANOVA and Tukey HSD tests (P< 0.05). Results: After 15 days of fluoride product use, Group A samples had the highest fluoride uptake (0.19 mu g mm(-2)) (P< 0.05). 48 hours after the interruption of fluoride product usage, a higher fluoride concentration was found in Group A samples. Although all fluoride products led to an enamel uptake, amine fluoride products promoted the most effective long-term uptake. (Am J Dent 2012;25:13-16).