Can toothpaste stain teeth? That seems counterproductive as toothpaste is meant to clean teeth. Some brands even go so far as to brand themselves as "stain-fighting" or "stain-erasing." Featured Video ...

CHICAGO (Reuters) - Procter & Gamble Co. is starting to market its oral care businesses together after keeping leading toothbrush maker Oral-B largely separate from its Crest brand for nearly a year ...