The Effect of a Microencapsulated Iron Supplement, Hydrogen Peroxide Superior and Professional Dental Prophylaxis on the Color and Whiteness of Teeth

Abstract

Purpose: To investigate the effect of a microencapsulated liposomal nano-iron supplement, an Fe+2 supplement, black tea, a bleaching agent with a new composition and professional dental prophylaxis (PDP) on tooth color and whiteness change. Materials and Methods: 84 extracted teeth were immersed in liposomal iron, Fe+2 and black tea solutions by special apparatus. Then different applications were applied: (1) no treatment, (2) water polishing, (3) PDP, (4) bleaching with 25% hydrogen peroxide superior (HPS). Measurements were taken at baseline, 2nd, 4th, 8th week and after applications. Statistical analysis of color and whiteness changes was performed by ANOVA and Bonferroni tests (α=0.05). Results: The effects of time, application, beverage and their interactions on color and whiteness were statistically significant (p<0.05). At week 8 and at after application, the highest color change was for black tea-HPS pair (∆E00=3.38, ∆E00=2.21, respectively) (p<0.001). At week 8, the highest darkening (∆WID=-4.67) and at after application, the highest whitening (∆WID=3.01) was caused by the black tea-HPS pair (p<0.001). Conclusions: Black tea, Fe+2 and liposomal iron supplements increased the color change of the teeth towards black over time. Black tea caused the highest darkening of the teeth. The order of magnitude was black tea>Fe+2>liposomal iron (p<0.001). Hydrogen peroxide superior and PDP provided an effect above the clinical perceptibility threshold selected in this study in terms of color recovery of darkened teeth. The order of magnitude was hydrogen peroxide superior>PDP.

Keywords

• Iron supplements
• Color
• Whiteness
• Hydrogen peroxide superior
• Professional dental prophylaxis

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