This in vitro study investigated the effect of different types of sealants (Concise Light Cured White Sealant - 3M; Fluroshield - Caulk/Dentsply) and the use of primer (Tenure - Den-Mat) on the microleakage of saliva-contaminated enamel. Sealants were placed on 360 surfaces (occlusal, buccal and lingual) of extracted teeth free of caries. After being prepared according to each experimental group, they were thermocycled (5 and 55ºC) for 500 and 2.000 cycles. Then they were immersed in a silver nitrate solution (50%) and cut in longitudinal slices. The results were described in linear measurements (mm) by means of a digital-image analysis system. Contamination and use of primer had different influences when subjected to the different experimental conditions. Both sealants had the same influence on microleakage. Flow of Fluroshield into pit and fissures was improved by use of the primer, and a greater amount of bubbles could be observed in this material.
Pit and fissure sealants; Dental adhesion; Dental materials
