Study in vitro of the Microleakage in the Pits and Fissures Sealed with Resin Sealant and Compomer

Objective: The purpose of this study in vitro was to compair the microleakage in pits and fissures sealed with polyacid modified resin (Dyract™) and resin sealant (Fluoroshield™). Method: In this study, 36 sound permanent premolars were equally distributed into three groups: GI (Flu.), GII (Dyr.) e GC (Control-without sealant). The materials were applied and a DES/RE cycle was processed to simulate a high cariogenic challenge. For immersion in the Silver Nitrate solution (50%), the roots and anatomic crowns (2mm over the margin of the material) were protected with nail enamel. After that, the nail enamel was removed and the teeth included in epoxi resin. Each crown was longitudinally seccioned in vestibular-lingual direction, to evaluate the degree of microleakage in the enamel/sealant interface. The marginal microleakege was classified by three examinators and the scores were: 0-no die penetration, 1-half die penetration, 2-complete die penetration. Results: The results were statistically analised by ANOVA, Kruskal-Wallis and Mann-Whitney (p