entists have long sworn by the credo: "You don't have to floss all your teeth, just the ones you intend to keep." That statement is literally the truth -- the only surefire method of avoiding gum disease (gingivitis) and tooth decay is to floss and brush daily. Following are some dentists' recommendations on the best techniques for oral hygiene: Brush the teeth gently twice a day with a soft nylon brush. Use small circular and short back-and-forth motions. Brush gently along the gum line to help prevent plaque buildup. Brush your tongue, especially in the back. It's a key hiding place for germs and bacteria. Use fluoride toothpaste for further protection from decay. When flossing, use a piece of floss about 18 inches long. Gently bring the floss through tight spaces between teeth, using a sawing motion. Curve the floss around each tooth and gently scrape from below the gum to the top of the tooth. Rinse your mouth after flossing. Have your teeth checked at least every six months to stay ahead of any disease that might develop. If you have diabetes, a checkup every six months is especially critical. © Your HealthStyle, 2002.