Microleakage at gingival margins of Class V composite resin restorations rebonded with various low-viscosity resin systems

The failure of a composite esin restoration to seal at its interface with unetched tooth structures, resulting from polymerization shrinkage, creates an unwanted marginal microleakage. liebonding with a low-viscosity resin system has been recommended to reseal the marginal gap and to reduce microleakage. Since no particular refin system is commercially available, any low-viscosity resin has been utilized for this purpose. However, findings of this study seem to indicate the importance of selecting the appropriate resin system to optimize the outcome of this rebonding procedure, emphasising the lowest viscosity and good wettability of the system. With proper seiection of the resin system, this rebonding procedure can significantly reduce the microleakage at gingival unetched margins of Class V composite restorations.