- Mom, oh Mom! Look Mom, no cavities! - No new cavities, how marvelous! Sally, do you use Crest toothpaste? It certainly helped all of us. Spokesperson: Yes, Crest really works for grownups and children right down to your very youngest, because only Crest has fluoristan, a special fluoride formula. Fluoride, you know, is the decay fighter dentists use. The decay fighter, dentists put on teeth to prevent cavities. With Crest, you put the same fluoride on your teeth at home too. Every time you brush that's Why Crest can cut your families' cavity rate almost in half. Yes, when you switched to Crest with fluoride, you can prevent about half your families' cavities and for stopping mouth odor, no toothpaste beats Crest. So switch to Crest. You two may hear. - Hey Mom, Look Mom no cavities!