Effect of one-bottle adhesive systems on the fluoride release of a resin-modified glass ionomer

a dhesive systems associated to resin-modified glass ionomer cements are employed for the achievement of a higher bond strength to dentin. despite this benefit, other properties should not be damaged. this study aimed at evaluating the short-time fluoride release of a resin-modified glass ionomer cement coated with two one-bottle adhesive systems in a ph cycling system. four combinations were investigated: g1: vitremer (v); g2: vitremer + primer (vp); g3: vitremer + single bond (vsb) and g4: vitremer + prime & bond 2.1 (vpb). sb is a fluoride-free and pb is a fluoride-containing system. after preparation of the vitremer specimens, two coats of the selected adhesive system were carefully applied and light-cured. specimens were immersed in demineralizing solution for 6 hours followed by immersion in remineralizing solution for 18 hours, totalizing the 15-day cycle. all groups released fluoride in a similar pattern, with a greater release in the beginning and decreasing with time. vp showed the greatest fluoride release, followed by v, with no statistical difference. vsb and vpb released less fluoride compared to v and vp, with statistical difference. regardless the one-bottle adhesive system, application of coating decreased the fluoride release from the resin-modified glass ionomer cements. this suggests that this combination would reduce the beneficial effect of the restorative material to the walls around the restoration.