Woman: At the carnival, my roommate Marianne tried hard. But I usually won the prize. Once though, she came out ahead, when we were on opposite sides in a toothpaste test back at school. For two years, each side brushed with a different toothpaste, and hers reduced cavities 34%. Later, we learned it was Crest. My side used the same toothpaste, but without fluoristan. Now it's regular checkups, watch between meal treats, and brush often with Crest. Narrator: Crest reduced cavities 34% in this test. In a similar test, 21%. And in still another test where everyone brushed three times a day, Crest reduced cavities 46%, almost half. This seal and statement signify that Crest toothpaste is accepted by the Council on Dental Therapeutics of the American Dental Association. Crest proved effective against cavities.