Mourad, L.M.E.-K.M., Elzainy, M.A. and Hussein , S.I. 2022. Comparing the Effect of Activated Charcoal Whitening Agents against Regular Whitening Toothpastes on the Enamel Surface of Premolar Teeth: In vitro Study. Open Access Macedonian Journal of Medical Sciences. 10, D (Nov. 2022), 493–498. DOI:https://doi.org/10.3889/oamjms.2022.11057.