The Influence of Surface Sealer or Self-etch Primer on Micro Leakage around Class V Cavities Filled with Class V Cervical Restorative Resin

Today a new restorative resin called “Class V cervical restorative resin” with itsspecific surface sealer “Seal-n-Shine” has been introduced to use for reducing of micro leakage inclass V restorations. The aim of this study was to evaluate the influence of surface sealer or self-etchprimer on micro leakage around class V cavities filled with “Class V cervical restorative resin”.Methods and Materials: In this in vitro experimental study, wedge shaped cavities were prepared onfacial surface of 40 intact premolars, using No. 56 carbide bur. The occlusal margin was prepared inenamel and the cervical margin was in cement. The teeth then were divided into 4 groups of 10. Fourgroups of materials were used, one for each group of the teeth: class V restorative resin; class Vrestorative resin and its specific sealer; self – etch primer of Clearfil SE Bond and Class V restorativeresin; and self – etch primer of Clearfil SE Bond, class V restorative resin and surface sealer ofClearfil SE Bond. Then all the samples were thermo cycled (1500 cycle, 5-55). Afterwards they wereplaced in 50% silver nitrate solution and developing solution, respectively. Finally they were sectionedlongitudinally and were evaluated by stereo-microscope at × 28 magnifications. The data wasanalyzed using Kruskall-Wallis and Man-Whitney tests. There were no significant differences in micro leakage of enamel margins between the fourgroups. But, considering the dentinal margins, the differences were significant between groups 1, 2; 1,3; and 1, 4. The differences between the other two paired groups were insignificant. For decrease of micro leakage, the usage of class V cervical restorative resin per se is noteffective, and it is better to apply its specific sealer (Seal-n-Shine) on the surface of restoration, or aself-etch dentin bonding agent under it.