sealing of adhesive systems in ferric sulfate-contaminated dentinal margins in class v composite resin restorations

Background.hemostatic agents are applied to prepare an isolated bleedingfree condition during dental treatments and can influence adhesive restorations. this study evaluated the effect of a hemostatic agent (viscostat) on microleakage of contaminated dentinal margin of class v composite resin restorations with three adhesives.methods.sixty freshly extracted human molars were selected and class v cavities (3×3×1.5 mm) were prepared on buccal and lingual surfaces. gingival margins of the cavities were placed below the cementoenamel junction. the teeth were divided into six groups randomly. the adhesives were excite, adhese and adhese one. in three groups, the gingival walls of the cavities were contaminated with viscostat and then rinsed. the cavities were restored with composite resin and lightcured. after storage in distilled water (37°c) for 24 hours and polishing, the sles were thermocycled and sealed with nail varnish. then they were stored in 1% basic fuchsin for 24 hours, rinsed and mounted in selfcured acryl resin, followed by sectioning buccolingually. dye penetration was observed under a stereomicroscope and scored. data were statistically analyzed with kruskalwallis and mannwhitney u tests. p <0.05 was set as the level of significance. results.only in the excite group, contamination did not have adverse effects on dentin microleakage (p > 0.05). in the contaminated groups, excite had significantly less microleakage than the others (p = 0.003). adhese and adhese one did not exhibit significant difference in microleakage (p > 0.05).conclusion.viscostat hemostatic agent increased dentinal microleakage in adhese and adhese one adhesives with no effect on excite.