<p>Aim: The study looked to determine whether casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) differed from toothpastes containing NaF in its ability to inhibit demineralization. <p>Materials: Extracted permanent molars were sectioned and allocated to 4 different groups. the pieces were treated 30 minutes daily for 7 days by the following agents: 1450 ppm NaF, 5000ppm NaF, CPP-ACP, ...