Brazil.

Salivary retention after application of fluoride gel using toothbrush or tray: a crossover trial Abstract: Currently, there are no studies in the literature evaluating sali-vary fluoride retention after small amounts of fluoride gel are applied to children’s teeth. Therefore, the objective of the present study was to com-pare salivary retention after gel application using a toothbrush or by tra-ditional application with trays. In this crossover study, children with ac-tive caries (n = 10) were randomized into one of the following treatment groups: a) application of fluoride gel using a tray (control), or b) applica-tion of fluoride gel with a toothbrush (treatment). After a 7-day washout period, the treatments were inverted. Unstimulated saliva samples were collected at baseline and 0.5, 5, 15, 30, 60 and 120 minutes after acidu-lated phosphate fluoride (APF) gel application in order to analyze fluoride retention in saliva. The area under the curve (AUC) was also calculated. There were no differences in fluoride retention after application of small amounts of APF with a toothbrush compared to traditional gel applica-tion using trays at all time points studied, and no differences in AUC were observed (Student t-test, p> 0.05). These results suggest that appli-cation of fluoride gel in children using a toothbrush can be utilized as an option rather than traditional trays, since the same salivary retention of fluoride is obtained using a lower dose