PEERJ, sa.11, ss.1592, 2023 (SCI-Expanded)
Background: The effects of whitening toothpastes containing nanohydroxyapatite
on the surfaces of restorative materials are not well known. This study evaluated the
changes in surface roughness and color of coffee-stained restorative materials after
brushing with nanohydroxyapatite and other whitening toothpastes.
Methods: Disc-shaped specimens were formed using microhybrid, nanohybrid, and
supra-nano-filled composite (n = 30) and stained with a coffee solution. A brushing
simulation was applied with toothpastes containing nanohydroxyapatite (Dentiste
Plus White), perlite (Signal White System) and hydrogen peroxide (Colgate Optic
White) for 7, 15, and 30 days. Color and surface roughness measurements were taken
before and after brushing. Color change (ΔE00) was calculated using the CIEDE2000
system.
Results: Supra-nano-filled composite-Dentiste Plus White, supra-nano-filled
composite-Colgate Optic White, and nanohybrid composite-Signal White System
were the groups with the greatest color change observed on the 7th, 15th, and 30th
days, respectively. The smallest color change was seen in the microhybrid
composite-Signal White System, microhybrid composite-Dentiste Plus White, and
nanohybrid composite-Dentiste Plus White groups on the 7th, 15th, and 30th days,
respectively. No significant surface roughness changes were observed in the
nanohybrid composite-Dentiste Plus White, supra-nano-filled composite-Colgate
Optic White, supra-nano-filled composite-Dentiste Plus White, or supra-nano-filled
composite-Signal White System groups.
Conclusions: Whitening toothpaste containing nanohydroxyapatite provided a high
degree of color change in the short term and did not create significant surface
roughness in nanohybrid or supra-nano-filled composites.