Background: The coronal seal is a crucial factor in success of endodontic therapy. Hence the aim of the present study was to assess the sealing ability by evaluating microleakage of three different types of interim restorative materials. Method: A total of 80 extracted human premolars were divided randomly in to 4 groups. Group A: Control group, Group B: Systemp Inlay, Group C: Temp IT Blue, Group D: Cavit-G. Standardized access cavity preparation was done followed by placement of cotton pellet in the access cavity, Interim restorative materials were placed as per the assigned group of restorative materials. Teeth were stained with 2% methylene blue solution for 1 week after which all the teeth were analysed for dye penetration under stereomicroscope. Statistical analysis of data was done using one-way ANOVA and Post Hoc Tukey test with a significance level of P ≤ 0.05. Results: Systemp Inlay showed the least micro leakage value followed by Temp.it blu and Cavit G. Intergroup comparison showed statistically significant difference between Systemp Inlay and other groups whereas Temp IT Blue and Cavit G showed no statistical significance.
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