DEAR DOCTOR K: I'm confused by the many types of toothpaste on pharmacy shelves. What should I look for in a toothpaste?
DEAR READER: To prevent cavities and tooth decay, you need to brush away plaque -- that sticky, bacteria-laden material that builds up on teeth. It's best to brush at least twice daily, once after you eat breakfast, and then again before you go to sleep. When it comes to plaque removal, your toothbrush does most of the heavy lifting.