Oral health is an important part of general health. China has a large number of patients with caries and periodontal disease, and the human, material and financial resources for oral health care are very limited, therefore, the fundamental way out to solve the problem of dental disease lies in prevention. Protecting teeth in addition to daily brushing, rinsing after meals these well-known methods, there are some other self-care measures. 1, timely removal of food fillings between teeth. In the process of chewing food, the gap between the teeth often caught into the food fibers, they are harmful to the teeth and periodontal tissues. We can remove them by brushing, flossing and interdental brushes to maintain oral hygiene. 2, give the teeth adequate nutrition. The development of teeth can not be separated from a variety of nutritious food. Therefore, whether it is adults or children and teenagers, the diet should be diversified, do not favor food. 3, develop the correct chewing habits. The correct chewing method is to alternate between the two sides or both sides. 4.Correct the bad habits that harm the teeth. Some infants and young children due to thumb-sucking, licking, biting, open-mouth breathing, lip-biting and other habits, resulting in misalignment and malformation of the teeth. Correcting bad habits is conducive to dental health. 5, tea is conducive to the prevention of dental caries. Tea can prevent caries is the main component containing fluorine and catechol and other substances. Fluoride ions can be enamel in the hydroxyapatite into fluorapatite, improve the structure of the enamel, enhance its role in acid resistance; catechol and other substances can inhibit the oral cavity Streptococcus pyogenes (i.e., caries-causing bacteria) proliferation. Drinking tea or gargling with tea can play a role in protecting teeth and cleaning the oral cavity. At present in many countries in Europe and the United States, has been drinking tea after meals, as a solution due to the diet of cheese, meat more than one of the measures caused by bad breath. After eating garlic, immediately chew a little tea, also has the effect of removing odor. 6, it is important to brush your teeth before going to bed. After people fall asleep, bacteria in the oral temperature and saliva secretion is reduced in the case of easy reproduction. Sugar fermentation acid, corrosion of teeth to form cavities, so brush your teeth before going to bed as thoroughly as possible, which has an important role in the prevention of dental disease. 7, some drugs are detrimental to the health of teeth. Tetracycline, chlortetracycline and other drugs can make the teeth yellow or enamel underdevelopment, easy to caries later, so do not take a lot or long-term use of these drugs. 8, prevent trauma. Do not bite hard objects with your teeth to avoid damage to your teeth. 9. Regular checkups. Regular dental checkups can prevent the growth of dental disease. Adults are best to have a dental examination once a year, found that dental disease timely treatment.