Comparative Evaluation of Sealing Ability of Newer Materials Used As Dentin Substitutes in Class II Sandwich Restorations: An In Vitro Study

ABSTRACT

Introduction: Even with the advances and innovations inrestorative dentistry, microleakage is regarded one of the mainproblems in this area.Objective: To evaluate in vitro marginal microleakage ofBiodentine, Fuji II LC and SDR at the cervical level and at theinterface these materials with Tetric N Ceram Bulk fillcomposite and also to note the marginal microleakage whenthese materials were used as bulk fill materials.Materials and Methods: Cavities, standardized on the mesialand distal surfaces, were prepared in thirty molars andrandomly assigned to two groups (n = 30), according to themode of restoration done.Goup1 (control) in which testmaterials were used as bulk fill. These were further subdividedinto subgroups according to the material. SG1 Biodentine(SEPTODONT); SG2 Fuji II LC (GC); SG3 SDR (Dentsply).Group2 (experimental) in which test materials used as dentinsubstituent in class II sandwich technique followed byrestoration with Tetric N Ceram (Ivoclar vivadent). These werealso divided into subgroups, SG4 Biodentine + Tetric NCeram; SG5 Fuji II LC + Tetric N Ceram; SG6 SDR + Tetric NCeram. After storage for 24 hours in an incubator (37 °C), thesamples were submitted to the thermocycling test (500 cycles5 °C/55 °C). They were later waterproofed, immersed in 1%methylene blue solution and sectioned in the mesialdistal direction for evaluation under stereomicroscope at 30xmagnification (Nikon SMZ 1500 Zoom Stereomicroscope)Scores from 0 to 3 using the ISO microleakage scoring system(ISO/TS 114052003). The ANOVA Test and Post- hoc Test,with a significance level of 5%, were used for statisticalanalysis.Conclusion: The study concluded that SDR (SD 2.38) showedthe least amount of microleakage both at the occlusal and atthe cervical levels in open sandwich restorations and alsowhen used as bulk fill materials as compared with Biodentine(SD 1.73) and Fuji II LC (SD 1.00).