Influence of Surfactants and Fluoride against Enamel Erosion

Abstract

This study investigated the effect of surfactants associated with sodium fluoride (NaF) on enamel erosion prevention, using an erosion-remineralization in vitro model. Sodium lauryl sulfate (SLS), polysorbate 20 (P20), and cocoamidopropyl betaine (CAPB) were tested, at concentrations of 1.0 and 1.5%, and associated or not with NaF (275 ppm). The control groups were distilled water and the NaF solution. Bovine enamel samples (n = 12) were prepared and submitted to a 5-day cycling model: acid challenge (0.3% citric acid, pH 2.6, 4×/day), human saliva (2 h, 4×/day), and the treatment solutions (2 min, 2×/day). The protective potential of the agents against initial erosion was assessed by microhardness and the surface loss by profilometry. Enamel surface wettability was determined by goniometry, protein adsorption was measured by spectroscopy (FTIR), and the KOH-soluble fluoride was quantified. Goniometry showed that SLS and CAPB increased enamel wettability. No differences were found among the surfactants regarding protein adsorption. Microhardness showed that SLS reduced NaF protection. P20 (1 and 1.5%) and CAPB 1.5% presented a protective effect, but lower than the NaF solution. Profilometry showed that CAPB protected enamel, but no agent associated with NaF promoted a higher protection than the NaF solution alone. KOH-soluble fluoride analysis showed that all surfactants reduced the fluoride adsorption on the enamel surface. Therefore, the surfactants tested (except for P20) changed the enamel surface energy. The SLS decreased the protective potential of NaF on initial erosion, but no tested agent interfered with the protective effect of NaF on enamel erosive wear.

Fluoride Retention in Root Dentin following Surface Coating Material Application

“…We expected that both S-F and T-F would be present after the application of fluoride-containing dental materials. Many studies have reported on S-F following fluoride application [ 8 , 9 , 10 ]. However, we focused on T-F, which could be detected by using an in-air micro-PIXE/PIGE system.…”

“…Fluoride and calcium concentrations were measured in two adjacent slices. One slice was immersed in 50 mL of 1M KOH solution for 24 h and then rinsed with water for 5 min to remove S-F according to previous studies [ 8 , 10 ] and analyze the T-F. The other slice was not subjected to KOH treatment and was used for W–F analysis.…”

“…When fluoride uptake occurs at the tooth surface, it is converted into two kinds of fluoride products. The first is a calcium fluoride-like (CaF 2 -like) material [ 8 , 9 , 10 ]. This product could serve as a fluoride provider to the tooth structure and helps in decreasing tooth demineralization.…”

Enhancing the Anti-Erosive Properties of Fluoride and Stannous with the Polymer Carbopol

“…Human saliva was used as the remineralization solution and for acquired pellicle formation. It was collected from 15 donors who had no general and oral diseases, were not pregnant, and had a stimulated salivary flow higher than 0.8 mL/min and an unstimulated flow higher than 0.2 mL/min) [Zanatta et al, 2019]. Before the saliva collection, the donors were instructed to brush their teeth with a fluoride-free dentifrice (Cocoricó, Bitufo, São Paulo, Brazil).…”

Avaliação de um biovidro experimental na perda de superfície e oclusão tubular da dentina, e da sua associação à terapia de fotobiomodulação na diferenciação de células da polpa dentária humana

“…Além disso, o mecanismo de ação do Clinpro não é o mesmo do que o de uma pasta profilática. O selante ionomérico tem uma maior adesão aos substratos dentais, com resultados clínicos positivos na redução da dor causada pela HD(106), o que nos levou a escolhê-lo como controle positivo.…”