| Summary: Sealing of initial enamel lesions by infiltration with low viscous resins seems to be a promising alternative to the common strategies of remineralization and invasive treatment.;Objective: The aim of the present study was to compare the microleakage of initial enamel lesions treated with a resin infiltration system with two fissure sealants.;Methods: In each of 40 extracted human molars and premolars, an enamel window was demineralized for 60 days. Subsequently, the teeth were randomly assigned into four groups. Windows of the first and second group were etched with phosphoric acid and sealed with either a low filled or an unfilled fissure sealant, and the windows of the third group were etched with hydrochloric acid and sealed with an infiltrant, whereas, The last group remained as the untreated control. After applying the materials the overlying excess was wiped away and the resins were light cured. All groups were thermocycled 500 cycles [5-55c] with a dwell time of 15 seconds, and then immersed in 1% methylene blue for 4 hours. To visualize the microleakage, the teeth were sectioned into two halves and studied using a stereomicroscope. Microleakage depths were analyzed using Kruskal – Wallis test. The groups were specifically compared by means of Mann-Whitney U test with Holm–Bonferroni adjustment.;Results: Microleakage depths showed statistically significant difference among the groups. Control group showed more microleakage than other groups. The difference was statistically significant from Icon and Helioseal clear but close to significant from Embrace Wetbond. Microleakage of Icon group was not statistically significant more than Embrace, but was close to significant when compared with Helioseal Clear.;Conclusions: It can be concluded that resin infiltration is efficacious in reducing microleakge of artificial enamel carious lesions, and that Helioseal seems to provide a better seal than an infiltrant. |
