Effects of turmeric (Curcuma domestica) on color changes of nanohybrid composite resins

Abstract

In order to determine the susceptibility of nanohybrid composite resins to discoloration by turmeric, we immersed specimens in 0.015%, 0.15%, 1.5%, and 15% turmeric solutions for 24 and 48 hours and then measured the color changes using a Vita Easyshade instrument. Differences in color intensities were then identified using Kruskal-Wallis and Spearman's tests. Immersion of nanohybrid composite resins in turmeric solutions decreased brightness (L∗) and increased chroma a∗ and chroma b∗ values, leading to significant total color changes (ΔE). Moreover, higher turmeric concentrations were correlated with increases in the reddish-yellow staining of nanohybrid composite resins.