Abstract :
Background: Resin composites have become one of the widely used restorative materials in the field of dentistry. Resin composite Pre-heating is a recent innovative method that is clinically beneficial by improving handling and marginal adaptation of the resin to the tooth.
Aim: The study aims to determine the effect of temperature on the degree of microleakage in resin composite restorations.
Materials and Methods: In the present study, Class 1 cavity was prepared in 30 extracted non-carious human premolars and divided into two groups. Group A (n=15) - filled with nano-hybrid resin composite (3M™ Filtek™ Z350 XT Universal Composite) at room temperature. Group B (n=15) - filled with the same resin preheated and then checked for micro-leakage under SEM. Mann-Whitney test was used to compare the mean Marginal Leakage scores between the 2 groups.
Results: There was a statistically significant difference in the micro-leakage score between group A and group B. Group B showed minimal or no micro-leakage in comparison to Group A.
Conclusion: Preheating the resin composite has better adaptability to the walls thus reducing micro-leakage and postoperative sensitivity.
Keyword :
Composite resin, Microleakage, Polymerization shrinkage, Preheating, Scanning electron microscope