ABSTRACT
Currently, there are no studies in the literature evaluating salivary fluoride retention after small amounts of fluoride gel are applied to children's teeth. Therefore, the objective of the present study was to compare salivary retention after gel application using a toothbrush or by traditional application with trays. In this crossover study, children with active caries (n = 10) were randomized into one of the following treatment groups: a) application of fluoride gel using a tray (control), or b) application 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 acidulated 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 application using trays at all time points studied, and no differences in AUC were observed (Student t-test, p > 0.05). These results suggest that application 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.
Subject(s)
Child , Humans , Acidulated Phosphate Fluoride/administration & dosage , Dental Devices, Home Care , Fluorides, Topical/administration & dosage , Saliva/chemistry , Acidulated Phosphate Fluoride/analysis , Cross-Over Studies , Dental Caries/prevention & control , Fluorides, Topical/analysis , Gels , Statistics, Nonparametric , Saliva/drug effects , Time Factors , Treatment OutcomeABSTRACT
The release of fluoride from restorative materials (Vitremer, Ketac-Fil, Fuji II LC and Freedom) was evaluated during two 15-day periods, before and after a topical application of acidulated phosphate fluoride gel (APF). For each material, 6 specimens were made, which were immersed in 2 ml of deionized water. The fluoride concentration dosages in the solutions were read at intervals of 24 hours for 15 days. After this period, the specimens of each material received treatment with APF gel for 4 minutes and the fluoride released was analyzed at 24-hour intervals during the following 15 days. The analysis of variance and the Tukey test (p < 0.05) showed that the total mean fluoride released during the initial 15 days was greater for Vitremer and Ketac-Fil and lower for Fuji II LC and Freedom; and in the final 15 days there was a difference in release readings, with the greatest value for Vitremer, followed by Fuji II LC, Ketac-Fil and Freedom. The comparison of the results between the 1st day and the 16th day (after gel application) showed a greater fluoride release on the 16th day for Vitremer, Fuji II LC and Freedom and was equal for Ketac-Fil. Although all the materials evaluated gained fluoride with the application of APF, the data suggest that the resin-modified ionomers are more efficient in releasing fluoride to the medium than the other materials
Subject(s)
Acidulated Phosphate Fluoride/chemistry , Dental Restoration, Permanent , Dental Materials/chemistry , Administration, Topical , Acidulated Phosphate Fluoride/administration & dosage , Acidulated Phosphate Fluoride/analysis , Cariostatic Agents/chemistry , Composite Resins/chemistry , Gels , Glass Ionomer Cements/chemistry , Maleates/chemistry , Resins, Synthetic/chemistryABSTRACT
A proposiçäo deste estudo foi avaliar, in vitro, as alteraçöes microscópicas (em luz polarizada), ocorridas em lesöes artificiais de cárie, produzidas em esmalte bovino e submetidas à açäo de géis fluoretados acidulado e neutro. Para tanto, 18 incisivos bovinos foram divididos aleatoriamente em cinco grupos: 1. exposto à açäo de fluorfosfato acidulado (FFA) por um minuto (Nupro, Dentsplay); 2. FFA por quatro minutos (Nupro, Dentsplay); 3. fluorfosfato neutro (FFN) por um minuto (Nupro, Denstsplay); 4. FFN por quatro minutos (Nupro, Dentsplay); 5. controle. Foram produzidas lesöes de cárie, com área padronizada (12,6mm²), em secçöes de esmalte removidas da regiäo central da face vestibular desses elementos dentários. Constatou-se, por meio da análise microscópica, que as lesöes de cárie exposta à açäo do gel fluoretado apresentavam alteraçöes superficiais indicativas de erosäo da camada externa do esmalte, as quais foram bem mais expressivas diante de FFA
Subject(s)
Animals , Cattle , Acidulated Phosphate Fluoride/analysis , Acidulated Phosphate Fluoride/therapeutic use , Dental Caries/drug therapy , Dental Caries/therapy , Gels , Incisor , MicroscopyABSTRACT
O efeito do tempo de aplicaçäo tópica na formaçäo (logo após aplicaçäo) e retençäo de flúor (após 28 dias), assim como a açäo anticariogênica do flúor gel fosfato acidulado (FFA) foi estudado através de um modelo in situ. O estudo foi do tipo cruzado de 3 etapas de 28 dias (Controle, FFA-1 min. e 4 min), nas quais 15 voluntários utilizaram dispositivos intra-bucais palatinos contendo 4 blocos de esmalte dental (1 mm abaixo da superfície do acrílico), cobertos com uma tela plástica para acúmulo de placa. Para determinar o flúor formado, 2 blocos adicionais foram aderidos ao acrílico e retirados após aplicaçäo. Os dispositivos intra-bucais foram imersos 3x/dia em sacarose 10 por cento e os voluntários utilizaram dentifrício näo fluoretado, porém bebiam água fluoretada. As determinaçöes de flúor foram realizadas com eletrodo específico após prévia remoçäo de 5 camadas sucessivas de esmalte com HCI 0,5M e a quantidade de esmalte retirada foi estimada pela dosagem colorimétrica de fósforo...