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Byline: --HANNAH MORRILL
WHAT IT IS: Crest Weekly Clean Intensive Cleaning Paste. WHAT IT DOES: Used once a week, the paste polishes teeth almost as well as a professional cleaning, says the company. WHAT'S IN IT: ActivClean Crystals (a patented polymer) and finely ground silica. HOW IT WORKS: The silica, which is larger and more abrasive than the kind in daily toothpastes but less harsh than that in professional pastes, gently scrubs away stains. ActivClean Crystals dissolve in saliva to clean the teeth. WHAT AN EXPERT SAYS: "This mild ...