As you get older, your gums begin to recede and expose your tooth and root to plaque. Plaque is a waxy build up that covers your teeth and builds up and collects between your teeth and gums. These circumstances causes tooth decay. If the plaque is not removed right a way, it hardens and forms what is known as tartar. The build up of tartar can be avoided by brushing your teeth at least twice a day, using a soft brush, brushing in small circular motions and short back and forth strokes. Don’t forget to brush your tongue. Floss your teeth regular to remove tartar that your brush can’t get to. If you experience bleeding or hurt when you brush or floss than you should see a dentist.