Preventing tooth decay requires good oral cleaning habits, dietary habits, regular checkups and good oral health care. It is recommended that anyone with or without cavities should go to the hospital regularly to check their oral condition. 1. Brush your teeth every day, use electric toothbrushes, flossers and dental floss correctly, and brush your teeth at least twice a day and for about three minutes each time. Adults should use the Pasteur method of brushing, and children should use the circular method. 2. Diet should minimize the frequency and amount of sugar intake, try not to drink beverages, and eat regularly to ensure dietary fiber intake. 3. It is routinely recommended to check the oral condition every six months, and those at high risk of caries are recommended to check once every three months or so. 4. Young children can be coated with fluoride to protect their teeth, and the back teeth can also be fossa sealed to prevent caries.