The Difference in Color Change of Preheated and Non-Preheated Nanofiller Composite Resin After Immersion in Non-Instant and Instant Coffee

Abstract

Background: One of the aesthetic issues in using composite resin is the color change. This study aimed to compare the color changes of preheated and nonpreheated nanofiller composite resin soaked in non-instant coffee and instant coffee. Method: This study involved 24 round composite resins with a diameter of 12 mm and a thickness of 2 mm. The samples were divided into two groups (n=12); group I was prepared at 68°C and group II was prepared at room temperature. After curing, the samples were immersed in distilled water at 37°C for 24 hours before being measured with a UV-vis spectrophotometer. Each group was divided into two sub-groups (n=6), one soaked in non-instant coffee and the other in instant coffee for three days, and the final color was measured. The data was analyzed using two independent t-tests with a significance level of α =0.05. Result: Two independent t-tests revealed a significant difference between preheated and non-preheated nanofiller composite resins soaked in noninstant coffee (p<0.05), as well as a significant difference between preheated and non-preheated nanofiller composite resins soaked in instant coffee (p<0.05). Conclusion:The preheating was effective to improve the color stability of composite resin after immersion in non-instant coffee and instant coffee.