Whitening efficacy of popular natural products on dental enamel

Abstract

The objective of this study was to evaluate the effect of natural bleaching products on the color, whiteness, and superficial properties of dental enamel. Seventy fragments of bovine teeth were obtained (6mm x 6mm x 2mm). Initial surface roughness (Surfcorder SEI700, Kosakalab), microhardness (HMV-2, Shimadzu), color (EasyShade, VITA), and surface gloss (Micro-Gloss 45° BYK, Gardner) readings were done. Samples were separated into five groups (n= 14) according to the treatments used: CT-conventional toothpaste (negative control); CH-charcoal; TU-turmeric; BP-banana peel, and CP 16°/o-16% carbamide peroxide gel (positive control, 4 h/day for 14 days), and then brushed for 560 cycles (T1) and 1200 cycles (T2), equivalent to 14 and 30 days of brushing. New measurements were performed after T1 and T2. The whiteness index for dentistry change (ΔWID) and Weight loss (Wl) were calculated. CPI 6% demonstrated the highest (pc.05) color change (ΔE00) and ΔWID (2-way ANOVA, Bonferroni, p