The Influence of Coffee Staining and the Office Bleaching on Color Change in Different Group Shade Universal Composites

The Influence of Coffee Staining and the Office Bleaching on Color Change in Different Group Shade Universal Composites

Objectives 
This study aimed to investigate the influence of coffee staining and office bleaching on color change in different group shade universal composite resins.

Methods 
Standard cylindrical cavities of 6 mm diameter and 2 mm depth were prepared on acrylic teeth. A total of 30 samples were prepared, 10 in each group. Restorations were made with TPH Spectra ® ST (SP), OptiShade (OS), and Filtek™ Universal Restorative (FU) group shade universal composites. Then the samples were kept in coffee solution for 14 days. Then, the office bleaching agent applied. The color measurements of the samples were measured using a spectrophotometer. Color measurements were recorded separately at baseline, 7 days, and 14 days after staining and after bleaching. CIEDE2000 was used as the color difference formula. The experimental results were statistically evaluated with Kolmogorov-Smirnov and Shapiro Wilks tests.

Results 
When △E₀₀(1) values were analyzed , the FU composite showed greater color change than the SP (p: 0.003;p<0.005). When △E₀₀(6) values were analyzed, the SP composite showed greater color change than the FU (p: 0.001; p<0.05)

Conclusions 
Coffee staining caused unacceptable color changes in all group-shade composites. Office bleaching resulted in removal of discoloration in all group shade composite groups.Evaluating the impact of coffee staining and office bleaching on color change can provide insights into the long-term durability of restorations. This information is valuable for predicting the lifespan of composite materials and for enhancing future dental materials.