Effect of Preheating on the Color Stability of Two Different Commercially Available Nanohybrid Dental Composites: An In Vitro Study

Introduction:Color stability is one of the important criteria for the selection of composite during its service. Preheating of composite is performed to improve its handling characteristics. The present study aimed to evaluate the effect of preheating in two nanohybrid composite resins.Material and Methods:Sixty disk samples were prepared and divided into 2 main groups according to the temperature of preparation (n = 30). Both the groups were subdivided into Group 1A - Kulzer Charisma Diamond (N = 15) and Group 1B - Tetric N-Ceram (N = 15). Al: the sample discs were further immersed in testing solutions of tea, coffee, and distilled water (N = 5) for each group.Results:We observed significantly lower color change in the preheated group as compared to room temperature and also comparable color change in both the types of composites used.Conclusion:It was thus concluded that preheating composites could be effective in maintaining color stability in nanohybrid composite resins.