The survey found that: tooth decay (caries), tartar, gingivitis (periodontal disease), dental stains (tooth surface staining), and tooth wear are the five most common oral problems, four of which are directly related to dental plaque. Plaque is a microbiota adhering to the surface of teeth or other soft tissues of the mouth, consisting of a large number of bacteria, shed epithelial cells and food debris, which cannot be removed by rinsing the mouth. It is closely related to the occurrence of dental caries and periodontal disease, and also contributes to the formation of tartar and dental stains. Brushing and flossing are the most effective ways to remove plaque. However, new plaque will be formed about 8 hours after the teeth are cleaned, therefore, you should brush your teeth 2 to 3 times a day and brush properly for more than 3 minutes each time. After brushing, rinse your mouth with toothpaste for 5-10 seconds, and then rinse your mouth with water for 1 to 2 mouthfuls, so that the substances in toothpaste that are good for oral health can stay for a while longer. In addition, flossing can reduce 80% of the plaque residing on the adjacent surfaces of the teeth. When flossing, place the floss close to the adjacent surface of the teeth above the gums and then move it up and down several times to scrape out the plaque, and floss should be used once every 1 to 2 days. Anti-bacteria and anti-disease recipe: wash and mash garlic, add a little water to make a paste on the gums, 10 minutes each time, for dentin allergy (commonly known as inverted teeth) is also effective. You can also use fresh radish with spicy flavor instead, which not only can sterilize and disinfect, but also can promote gum regeneration.