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SEM photomicrograph of Group A (negative control), Group B (CPP-ACP tooth mousse), and Group C (F-ACP tooth mousse) specimens showing open dentinal tubules and closed dentinal tubules respectively. SEM – Scanning electron microscope; F-ACP – Fluoride doped amorphous calcium phosphate; CPP-ACP – Casein phosphopeptide-amorphous calcium phosphate
