The adhesion of four polymeric sealant materials to enamel treated with a topical application of fluoride has been assessed by tensile bond strength tests. The ultraviolet light-activated resin, Nuva Seal, was found to bond adequately to stannous fluoride-treated teeth. The tensile bond strength of Espe 71730, Alpha Seal, and Epoxylite 9075 to enamel was reduced by treatment of the enamel with stannous fluoride. Treatment of the etched enamel with acidulated phosphate fluoride reduced the bond strength of all four fissure sealants.
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