Comparative Evaluation of Microleakage in Premolars after Placement of Microhybrid and Nanohybrid Composite Using Snow Plow Technique

Background: Microleakage is the significant reason for composite restoration failure. The type of composite material utilized should reduce polymerization shrinkage and hence avoid micro-leakage. Objectives: To evaluate microleakage in Class I cavity using microhybrid composite in snow plow placement technique. To evaluate microleakage in Class I cavity using nanohybrid composite in snow plow placement technique To compare microleakage in Class I cavity with microhybrid composite and nanohybrid composite using snow plow placement technique. Methodology: Prepared Class I cavities in 22 human premolars will be divided randomly into 2 groups based on the restorative material used. These cavity preparations will be restored using the snow plow technique. All the specimens will be thermocycled and stained with 50% silver nitrate solution. We will wash the specimens in the distilled water, store them in the developing solution and for 24 hours exposed to sunlight. The samples will be sectioned longitudinally from the middle of cavity into two parts and will be then evaluated for microleakage on the basis of silver nitrate penetration under stereomicroscope (20X). To compare the microleakage, data will be subjected to statistical analysis. Expected Results: Nanohybrid composite placement using snow plow technique is expected to have less micro-leakage than microhybrid composite placement using the same technique. Conclusion: If this study proves correct, this would be helpful for the clinicians to choose the most efficient restorative material with the best technique and minimal microleakage which will aid in the success of the root canal treatment.