The present invention is generally directed to an oral composition comprising a calcium phosphate salt and a combination of acids having differing solubilities in the oral cavity, for tooth mineralization or remineralization. The presence of a combination of acids in the oral composition acts to maximize the release of calcium and phosphate ions from the oral composition over an extended period of time, in order to promote the precipitation of enamel-like crystals on the surfaces of the teeth, or in subsurface regions therein.