"You'll wonder where the yellow went, when you brush your teeth with Pepsodent." I can still hear that jingle from the 1950s. My mom taught me, like your mom did, to brush my teeth every day, morning and night. Since we started daily brushing with fluoride toothpaste, we've dramatically cut down tooth decay. Add to this water fluoridation and good dental care and you have a dental miracle. (Interesting fact: Tooth decay was the number one reason for turning down Army voluntee