[Marginal seal of cervical composite inlays in vitro]

The presence of microleakage at the dentinal margins of conventional Class V restorations and direct composite inlays in combination with four dentin bonding agents was assessed by means of dye penetration. The use of dentinal adhesives with conventional one-step composite fillings failed to prevent marginal leakage. The dentin bonding agents used in this study were for more efficient when used with direct composite inlays. The resistance to thermal stress of these bonded Class V composite inlays was improved by application of a secondary light and heat cure, probably due to relaxation of residual material stress.