The color‐matching ability of single‐shade universal composites in extracted human teeth
Kiyono Koi, Silvia P. Amaya‐Pajares, Satoki Kawashima, Garima Arora, Jack L. Ferracane, Hidehiko Watanabe
Abstract
Abstract Objectives To evaluate the color‐match with extracted natural teeth of three single‐shade universal composites, a group‐shade universal composite, and a highly translucent‐shade conventional composite. Methods Twenty extracted human teeth were divided into light‐ and dark‐shade groups ( n = 10, LSG and DSG). A preparation was restored with the 3 single‐shade universal composites, OMNICHROMA (OMC), Admira Fusion x‐tra U (AFU), and Essentia U (ESU); a highly translucent‐shade conventional composite, Tetric EvoCeram T (TEC‐T); and two shades of a group‐shade universal composite—Filtek Universal Restorative (FUR A1 and A4). Composites were photopolymerized, polished, and stored in water for 24 h. The Δ E 00 value between the unprepared and restored surfaces was obtained using a spectrophotometer. Composite placement and measurements were repeated three times per tooth. Color differences were statistically analyzed with the within‐between‐subjects t ‐test and repeated‐measures analysis of variance (ANOVA), followed by post hoc pairwise comparisons with a Bonferroni adjustment ( α = 0.05). Results There were no statistically significant differences between OMC and FUR (A1 and A4). AFU and ESU showed significantly higher Δ E 00 values than OMC and TEC‐T ( p < 0.05). Single‐shade composites exhibited significantly higher Δ E 00 values in the DSG than in the LSG except ESU ( p < 0.05). None of the composites satisfied the criteria for an acceptable match (Δ E 00 >1.8). Conclusion OMC showed the same color matching ability as a group‐shade universal composite. A highly translucent‐shade conventional composite and OMC exhibited better color matching ability than other single‐shade composites. Overall, single‐shade universal composites performed better in lighter‐shaded teeth. Clinical Significance Single‐shade universal composites have the potential to reduce chair time by eliminating shade selection in cavities with lighter‐shade teeth. Highly translucent incisal conventional composites also may be used if the appropriate shade of composite is not available.