Toothpaste that reveals cavities?

I remember seeing a commercial with kids about a toothpaste that reveals cavities. If you brush with it and wherever there is a blue stain on your teeth, it means that you have cavities. Does anyone know the name of the toothpaste?

Toothpaste that reveals cavities?
NO THERE ISNT, BUT THERE ARE THINGS THAT CAN REVEAL WHERE PLAQUE IS.
Reply:It doesn't show cavities. It shows tarter that still needs more brushing. You are suppose to keep brushing until the blue is gone. It's mostly used to teach youngsters how to brush and how long to brush. I don't brush the teeth I have left. I scrub them.
Reply:Listerine has a children's mouthwash out that coats the plaque on the teeth and turns it blue. It's supposed to make it more fun for kids to brush - almost like a game to get all the blue off - and makes sure that they brush more tooth surfaces to get them clean. I don't think that there is a toothpaste available for this purpose, but you may be able to get disclosing tablets from your dentist or pharmacy.