Compomer – Dyract- A Comparison of its Bond Strength And Microleakage with Composite Resin And Glass Ionomer – An in Vitro Study

The development of aesthetic and adhesive dentistry and the availability of reliable new dental materials have changed the daily practice of dentistry because these advances have led to more conservative cavity design and preservation of maximum sound dental tissues. The objective of this study is to compare the bond strength and microleakage of Compomer with Composite and Glass ionomer (conventional and light cured); and also to study the tooth-restorative interface using SEM Materials and Method: 88 human premolar teeth extracted for orthodontic purposes were selected for this study, specimens were subjected to shearing stress in the Intron universal Testing machine & autoradiographs were assessed for depth of micro leakage. Photographs taken during scanning electron microscopic study of the interface between between dentine and restorative material were studied. Results: Group 1 (Compomer-Dyract) has a significantly greater bond strength when compared with the other three groups (p<0.001)which was statistically highly significant. group 2 in which Dyract-Compomer was applied after enamel etching showed the least micro leakage score. Conclusion: The present investigation lead to the conclusion that Compomer–Dyract had superior bondstrength and least microleakage than glass ionomer & omposite resins