Microleakage of Gum-Colored Resin Composites in Class V Cavities

Purpose: To compare the microleakage in class V cavities restored with different gum-colored resin composites. Material and Methods: Class V cavities were prepared on buccal and lingual surfaces of thirty human maxillary premolars. Clearfil SE Bond was used as an adhesive system. In the control group, cavities were restored with Filtek Ultimate. In the test groups, cavities were restored with Filtek Ultimate in combination with either PermaFlo Pink or Gradia Gum Shades, so as to evaluate the microleakage at the junction line, at the gingival and occlusal margins. Teeth were finished, thermocycled and evaluated for leakage. Dye penetration was evaluated with a stereomicroscope at x20 magnification. Data were analyzed statistically using Kruskal Wallis, Mann Whitney-U and Wilcoxon tests. Results: No statistically significant differences were determined between the microleakage values of the control and test groups (p 0.05). Conclusion: Both gum-colored resin composites demonstrated similar performance regarding marginal microleakage.