THE EFFECT OF FLOWABLE AND DUAL-CURE RESIN COMPOSITE LINERS ON GINGIVAL MICROLEAKAGE OF POSTERIOR RESIN COMPOSITES

Title: The effect of flowable and dual-cure resin composite liners on gingival microleakage of posterior resin composites the effect of flowable and dual-cure resin composite liners on gingival microleakage of packable resin composite restorations. the tooth – composite interface in cervical restoration margins and immersed in 2% basic fuchsin for 24 hours. Dye penetration was evaluated using a stereomicroscope with 28x magnification. The data were analyzed by Kruskal-Wallis and Mann-Whitney U-tests with p<0.05 as the level of significance. Results: The results of this study indicated that there were significant statistical differences between control-cured flowable liner, control-flowable liner without separately curing, control-cured dual cure composite resin cement groups.However there were no significant differences between dual-cure composite resin cement without separately curing and control, cured flowable liner and cured dual cure composite resin cement, flowable liner without separately curing and dual-cure composite resin cement without separately curing groups. Conclusion: The results of this study indicated that none of the techniques could thoroughly eliminate microleakage in gingival floor, however the effect of flowable or a dual-cure liner on reducing the gingival microleakage was found to be statistically significant in tested restorative material.

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