2025. Effects of Nanohydroxyapatite and Fluoride varnish on the Microhardness of the Artificially Induced Enamel Lesion: An In-Vitro Study. Mustansiria Dental Journal. 21, 2 (Dec. 2025), 167–177. DOI:https://doi.org/10.32828/mdj.v21i2.1159.