- Look, I want that story. - Dad, Dad! - Barry. - My checkup, only one cavity! - Hey, that's good news. - Somebody uses Crest. - How'd you know? - Well, Crest has fluoride and fluoride fights cavities. - That's why we switched to Crest. The others we tried didn't have it. Spokesperson: Crest can promise only one cavity, but we can promise most people good checkups. - Crest makes sense. A toothpaste should fight cavities. Spokesperson: Fighting cavities is the whole idea behind Crest.