The first, and perhaps most basic, way to keep your mouth healthy is to brush at least twice a day, in the morning and at night. And don't just focus on your teeth; you should spend 2 to 3 minutes each session brushing all surfaces of the teeth, your tongue and your palate. The mouth is full of a sticky bacterial substance called plaque. After eating (especially sugary foods), plaque unleashes acids that assault tooth enamel and can, over time, damage the enamel. The result? Cavities.
Use a soft-headed toothbrush, and don't keep it around indefinitely. Replace your brush every three to four months, sooner if the bristles are splayed or loose. Brush gently; scrubbing can wear down that protective enamel and irritate gums.