Effect of different topical fluoride applications on the surface roughness of a colored compomer

Abstract

ObjectiveThe aim of this study was to evaluate the effect of neutral sodium fluoride (NNaF) gel and acidulated phosphate fluoride (APF) gel on the surface roughness of colored compomer (Twinky Star), conventional compomer (Compoglass F) and resin-modified glassionomer cement (RMGIC) (Photac-Fil).Material and MethodsA total of 45 standardized disc-shaped specimens were prepared for each material. After 24 h, finishing and polishing of specimens were done with aluminum oxide disc. Surface treatments with topical fluoride agents or distilled water (control) were performed four times, and interspersed with 8 pH cycles, simulating high cariogenic challenges. After the treatment, the surface roughness (Ra) was determined using a profilometer. In each group, specimens with Ra closest to the mean were examined with a scanning electron microscope (SEM) at ×1,000 and ×3,500 magnifications. Two-way ANOVA was used to evaluate Ra measurements, and the differences in Ra values between subgroups for each material and each topical applications were compared by Tukey’s highly significant difference pairwise comparisons.ResultsNo statistically significant difference in Ra between the Twinky Star and Compoglass F was found. However, Photac Fil showed significantly higher Ra than these materials after all surface treatments. There was a general trend of Ra increase from controls to NNaF and APF gels for all materials. SEM observations revealed that the surface micromorphology of Twinky-Star did not differ significantly from that of Compoglass F.ConclusionBoth the compomers and the RMGIC showed significantly higher surface roughness when subjected to APF gel application.

Topical fluoride application is able to reduce acid susceptibility of restorative materials

“…Although the mechanism is still not clear, the deleterious effects of fluoride on restorative materials are thought to be due to the acidity of fluoride solutions and chemical erosion by a prolonged or frequent contact with the fluoride solution 18,22,23) . However, in a previous study using profilometric analysis 11) , an infra-additive interaction between erosion and toothbrushing with fluoridated toothpaste was observed, possibly suggesting the protective effects of fluoride in the erosion process of some restorative materials.…”

“…Based on the current literature, it can be speculated that the acid resistance of dental materials may vary after fluoride application depending on the composition of the respective material. However, only one published study showed that the surface roughness of the polyacid-modified resin composite and conventional glass-ionomer cement increased after APF application and subsequent erosive attacks 22) . Moreover, it has been found that the pH of fluoride solution plays an important role in the efficacy of fluoride agents against erosion of dental hard tissue 24) .…”

Effect of Different Topical Fluoride on the Surface Roughness of Glass Ionomer Cement

“…Hydrofluoric acid is more destructive ends of phosphoric acid for hydrofluoric acid can dissolve silica particles. In addition, the high degree of acidity on APF gel can cause a chemical reaction that causes erosion on the surface of the glass ionomer cement because the dissolution of the matrix -forming cations such as Na, Ca, Al, Sr and F. [4][5][6][7] In addition to the high acid content, a high fluorine content of APF gel can also cause surface roughness. Fluorine ions will bind to the carboxylic group to form a bond with Al3+ ions.…”

“…Fluoride release of this material cannot prevent the attachment and growth of streptococcus mutants efficiently to the material surface. [6][7][8][9] …”

“…A rough surface will be more susceptible to increased bacterial colonization and plaque retention and cause discoloration. 6 The aim of this study is to evaluate the effect of acidulated phosphate fluoride (APF) gel and sodium fluoride (NaF) gel on the surface roughness of glass ionomer cements.…”