The Comparison of Fluoride Release from Fluoride Releasing Dental Adhesives

Background: Fluoride is currently recognized as the main factor in significantly decline caries prevalence. It recently has been added in adhesive systems to prevent the development of secondary carious lesions at the restoration-tooth interface. The aim of this study was to measure and compare fluoride release from different fluoride-releasing adhesive systems which have different fluoride compound.

Methods: One control group(Clearfil SE bond or SE) and three fluoride-releasing adhesives(Clearfil liner F or LF, Optibond XTR or XTR, and FL-Bond II or FLB) which contain different fluoride compounds were placed on cylindrical teflon moulds(diameter 10 mm and thick 2 mm), then left in dark seal chamber 12 hours and light cured 20 seconds on the top and bottom. After that, the specimens(n=5) were stored in deionized water in plastic container and incubated in 37ºC incubator. Fluoride ion releasing from each adhesives were measured from the first day (24 hours after preparation) and every day in a week and every week in a month. Data was analyzed using one way ANOVA. P-value

Results: Fluoride releasing from all tested groups have been decreased by time. All tested groups released fluoride significantly difference from control group in the first day. From day 2 to day 7 and week 1 to week 4, only XTR and FLB group still released fluoride significantly difference from control group. The highest amount of fluoride release in a month is FLB group(7.098ppm), followed by XTR group(6.331ppm), and LF group(0.505ppm).

Conclusion: Based on the results, we concluded that sodium hexafluorosilicate and S-PRG filler in XTR and FLB group respectively release higher amount of fluoride than sodium fluoride in LF group.