Chewing gum may not have gotten your school teacher's approval, but as long as it's sugar-free, it will get a nod from your dentist! In fact, sugar-free gum is the only item in the candy aisle that can actually improve your oral health. Adding sugar-free gum to your day can help: Increase Saliva Flow Saliva plays a critical role in your overall oral health. In addition to washing away bacteria, saliva keeps your ...