1.Common oral diseases such as caries and periodontal diseases occur slowly. In the early stage, there is no obvious symptom, and it is not easy to self-awareness, but when there is pain and other uncomfortable symptoms, it may have developed to the middle and late stage of the disease, which is more complicated to treat, and the patient will suffer more pain, spend more money, and the treatment effect may not be very satisfactory. Regular oral health examination, early detection of oral diseases, timely treatment of oral diseases. 2, regular oral health examination, the doctor will also take appropriate preventive measures according to the oral health condition, to prevent the occurrence of oral diseases and control the development of oral diseases. 3, regular oral health examination, the doctor can also find some systemic diseases in the oral manifestations, and take appropriate measures to treat systemic diseases. What is regular oral health examination. Regular oral health checkups are oral health checkups that are performed when there is no oral disease or when you do not feel that you have oral disease, rather than going to the doctor only when it is clear that you have dental disease or toothache. The duration of regular checkups varies with age, but generally adults are examined once a year. The classification of regular oral health examination. 1.Group oral health examination, to understand the prevalence of common oral diseases in the population, according to the needs and possibilities, to develop prevention and treatment plans, to achieve the purpose of “early treatment of diseases and prevention of diseases”. 2.Individual oral health examination, to clarify individual oral health status, and guide individuals to take specific methods to maintain oral health. When planning to get pregnant, she should receive oral health examination. Pregnant women’s oral health is not only related to the health of pregnant women themselves, but also closely related to the growth and development of the fetus. The pain and discomfort caused by oral disease during pregnancy can affect the pregnant woman’s eating and lead to nutritional disorders in the mild cases, and in the severe cases, oral inflammation can spread throughout the body and affect the fetus, increasing the risk of fetal miscarriage or premature birth, and even lead to fetal malformation. Therefore, women should take the initiative to receive oral health examination when they plan to get pregnant, to find and deal with oral diseases or hidden problems in time, and not to get pregnant with oral diseases. Pay regular attention to children’s oral health starting from the first oral health examination. The first oral health examination for children should be conducted within 6 months after the first milk tooth erupts, that is, within the first year of age, mainly to check the eruption of milk teeth and assess the risk of caries, provide targeted oral hygiene guidance and establish the oral health record of children. After the age of 1, children should have a routine oral health examination once every six months. 1.Check whether there are caries, gum and oral soft tissue health condition, dental alignment and occlusion, and dental development, etc. 2.Children with early caries should be treated with filling as soon as possible. 3.To carry out caries prevention measures in real time, such as gutter closure and fluoride caries prevention. 4.When conducting oral health examination for children, the dentist should also provide appropriate oral health consultation service for parents, explain and demonstrate how to clean and care for the oral cavity and teeth. Older people should have oral health examination at least once every six months. Due to the special characteristics of the oral anatomy and physiology of the elderly, oral diseases develop and change rapidly, and the oral self-repair ability is weakened. The purpose of regular oral health examination is to detect diseases early. The content of the examination includes caries (especially root surface caries), periodontal disease, oral mucosal disease, oral cancer and so on. The residual roots in the oral cavity should be extracted as soon as possible if they are often swollen and painful, and the sharp cusps formed by excessive tooth wear should be ground and adjusted in time to prevent damage to oral soft tissues and temporomandibular joints. Oral health examination is best once every six months, and generally at least once a year, to detect problems and treat them in time.