Albadah As, Khan Am 2022. An in Vitro Study Comparing Nano-Composite Microleakage with and without Hydroxyapatite-Reinforced Glass Ionomer Cement and Cention N as a Base Material in Class I Cavity. Pakistan Journal of Medical & Health Sciences. 16, 05 (Jun. 2022), 400. DOI:https://doi.org/10.53350/pjmhs22165400.