A toothpowder oral care composition of fluoride ion source particulate (such as stannous fluoride particulate) dispersed in an oral calcium carbonate abrasive particulate bed is achieved with careful adjustment of the particle sizes of both the fluorinated particulate and the abrasive particulate to achieve a bed of toothpowder where neither the fluorinated particulate or the abrasive particulate will settle to create a localized concentration of the fluoride significantly different from the average concentration of the fluoride throughout the bed.
