Pinedo Saldaña AE, García Rupaya CR. Comparison of Surface Microhardness of Portland Cement Associated with Niobium Oxide and Zirconium Nanoparticles with the Mineral Aggregate Trioxide. Odovtos - Int J Dent Sc [Internet]. 2024Dec.12 [cited 2025Mar.28];27(1):64-72. Available from: https://revistas.ucr.ac.cr/index.php/Odontos/article/view/61616