Helal, M. A., Yang, B., Saad, E., Abas, M., Al-kholy, M. R., Imam, A. Y., & Gad, M. M. (2020). Effect of SiO2 and Al2O3 nanoparticles on wear resistance of PMMA acrylic denture teeth. Brazilian Dental Science, 23(3), 12 p. https://doi.org/10.14295/bds.2020.v23i3.1999