Effect of Fluoride in Phosphate Buffer Solution on Enamel

The purpose of the present study was to evaluate the effect of flueride on resin bonding to artifieially carious enamel. Speeimens frorn demineralized human enamel sections were prepared using two commereially available adhesives (Clearfil SE Bond, Kuraray; Single Bond, 3M} and a composite resin (Clearfil AP-X, Kuraray) according to manufacturers' instructions. They were then immersed in phosphate buffered saline solution with varied fluoride concentrations at O, O,1, O,5, 1, and 10 ppm, After immersion in each solution for oner three, or seven days, microshear bond strength was measured. The bond strengths of both adhesive systems to artificially carious enamel significantly increased after immersion in fluoridephosphate buffer solution, Based on the findings obtained, we thus proposed not to remove the white enarnel lesions for bonding in the clinic. They might be preserved and treated using fluoride applications.