[In vitro evaluation of the adaptation and quality of the margins in various composite systems].

Microleakage and marginal adaptation of different composite brands (Epoxydent, Restodent, Cosmic) in conventional and adhesive MOD-cavities have been investigated in an in vitro dye-penetration and scanning electron microscope study. The results were compared to those of a standard composite brand (Adaptic). Unrelated to the type of cavity and enamel etching procedures Epoxydent and Restodent revealed moderate results only. When the use of a sealant was omitted prior to bulk placement Cosmic showed the best adaptation. Priming (Cosmic Bond) was found to impede microleakage but not to influence marginal adaptation. The superiority of the adhesive restorations that had been performed with the Adaptic and the Concise system [4] is a result of the combination of these composite materials with a sealant and the new cavity design.