RESUMO
The extreme vulnerability to decay in pits and fissures on the occlusal surfaces of the teeth has prompted dental scientists to seek methods of caries prevention. Various criteria, such as bond strength, micro leakage and marginal seal are assessed in the evaluation of sealants. Motivated by the role of pit and fissure sealants in caries prevention, the aim of this study was to compare the micro leakage of Enamel Loc sealant, Concise and Concise +Prompt L-pop resin-based sealants. An in vitro study was undertaken using thirty extracted third molars. The teeth were divided into three groups; an experimental group using Enamel Loc as a pit and fissure sealant, a group using Concise and a group using Concise +Prompt L-pop. The teeth were kept in methylene blue dye 2% for 4 hours, sectioned samples were observed with stereomicroscope for the extent of dye penetration and scores were based on Williams and Winter criteria. Three groups of data were statistically analyzed using SPSS 18. Non-parametric Kruskal-Wallis test was used to detect differences among groups [p>0/001]. The Enamel Loc sealant micro leakage was significantly more than the two other groups [p>0/001]. Furthermore, Concise micro leakage was significantly less than Concise +Prompt L-pop group [p>0/001]. The Enamel Loc sealant performed worse in terms of sealing ability than the Concise and Concise +Prompt L-pop resin-based sealants