ABSTRACT
Objective: To compare the marginal adaptation of teeth restored with three types of materials (self-adhesive bulkfill resin Composite, conventional resin-composite, and resin-modified glass ionomer restorations).
Materials and methods: Three different restorative materials; Self‌-adhesive bulk-fill hybrid resin composite (surefil one, dentsplay sirona, Konstanz,Germany), Resin modified glass ionomer (fuji,, GC ,corp, Tokyo, Japan ) and Resin-based composite (Filtek Z250, 3M ESPE), were used in this study. A total of 36 premolars were classified into three groups (n= 12) according to the restorative system used. The samples after being kept for a day in distilled water, were thermocycled for 500 cycles (5-55 °C) with dwell period for 15 seconds, and then the specimens were examined using a Scanning electron microscope. All test data were tabulated, and Statistical analysis was performed using SPSS software by one way ANOVA test (p value <0.05).
Results: one-way ANOVA test was used to determine the effect of study variables (materials) and their interaction on the marginal adaptation values (p < 0.05), which revealed that none of the study variables had a significant effect on the marginal adaptation results (p > 0.05).
Conclusion: Within the limitations of this study, Self-adhesive bulk fill (surefil one) and RMGIC (fuji) showed multiple gaps in their interface with cavity walls especially at gingival margin. But conventional resin-based composite (filtek Z250) performed better in marginal adaptation test in all thirds of the class II cavity with no significant difference.