The American Dental Hygienists' Association web site provides comprehensive information about symptoms and warning signs of dental diseases. It also includes advice on everyday brushing and flossing techniques. Not sure if your child is old enough for a dental appointment? The ADHA web site outlines how often oral health appointments should be scheduled and how you can take care of teeth at home for infants, children, adults, and seniors. The site also features toothbrush giveaways and other contests.