BATUBARA, F.Y. et al. 2025. DIFFERENCES IN THE EFFECT OF APPLYING 6% AND 12% HYDROXYAPATITE PASTE FROM DUCK EGGSHELLS (ANAS PLATYRHYNCHOS) WITH CASEIN PHOSPHOPEPTIDE-AMORPHOUS CALCIUM PHOSPHATE (CPP-ACP) AS REMINERALIZING MATERIALS ON ENAMEL SURFACE HARDNESS (IN VITRO). International Journal of Applied Pharmaceutics. 17, 6 (Nov. 2025), 478–484. DOI:https://doi.org/10.22159/ijap.2025v17i6.54801.