The Wall Street Journal, MarketPlace by Tara Parker-Pope

Can You Chew Gum and Fight Plaque at the Same Time?
"Here's an ambitious marketing pitch: Chewing gum is good for your teeth. A slew of new gums claiming to clean teeth and reduce plaque will arrive on store shelves in the next few months. Along with mint and cinnamon flavors, the new gums come packed with extra ingredients, including a sweetener used overseas as a cavity fighter...All the new gums also use xylitol, a natural sweetener also found in Proctor & Gambles Co.'s Crest Multicare toothpaste..."