You should be brushing your teeth for two minutes, twice a day with fluoride toothpaste. Choose a soft-bristled brush that fits your mouth and place the toothbrush at a 45-degree angle to the gums. Gently move the brush back and forth in short, tooth-wide strokes. Brush the outer surfaces, the inner surfaces, and the chewing surfaces of the teeth. To clean the inside surfaces of the front teeth, tilt the brush vertically and make several up-and-down strokes. Brush your tongue to remove bacteria and keep your breath fresh.