Dental caries is commonly known as tooth decay and dental caries, which is a disease in which the hard tissues of the teeth are gradually destroyed due to bacterial infection. Sugar in food is broken down and metabolized by bacteria in the mouth to produce acidic substances, which can lead to dissolution, demineralization and disintegration of the hard tissues of the teeth, resulting in the loss of hard tissues of the teeth and the formation of dental cavities. Cavities will not heal on their own without treatment, and continued development will lead to pulpitis and periapical inflammation, with the end result being tooth loss. The end result is tooth loss. In severe cases, it can even cause inflammation of the alveolar bone and jawbone. 1, the prevention of dental caries to start from infants and young children This is because, infants and young children’s teeth have just grown, the surface of the enamel mineralization is not high, the adaptability of the external environment is small, easy to occur caries. In infancy, if you do not pay attention to the feeding method, it is very easy to suffer from “bottle caries”. In the process of feeding infants and young children, first of all, pay attention not to give children the habit of sugar addiction, such as adding sugar to milk, adding sugar to water, do not fill bottles with sugary drinks, and do not add too much sugar to the diet. Secondly, when breastfeeding, you should adopt the correct posture and position, and try not to develop the habit of sleeping with the bottle in your mouth. If your child has developed the habit of sleeping with a bottle, you should clean your teeth before going to bed and then feed him or her, and then feed him or her some lukewarm water after feeding him or her. After the child is one year old, parents should encourage the child to drink from a cup, and after one and a half years of age, you should stop using the bottle. In addition, when feeding the child, do not pass the bacteria in the adult mouth mouth to mouth to the child, saliva in the mouth is the carrier of bacterial transmission, when feeding young children, adults should pay attention to the following aspects: do not kiss the child’s mouth; do not use their own chopsticks to feed the child; do not chew food to feed the child, and so on, these behaviors will be in their own mouths caries-causing bacteria spread to the child, and lead to early growth of caries children. . 2, thorough oral cleaning, change the oral environment, create clean conditions is an important part of the prevention of caries Many parents often ask a question, children should start brushing teeth at what age? Our suggestion is that children should be born every day regular cleaning of the oral cavity, once the teeth eruption should use gauze cotton swabs or finger toothbrush to clean the teeth, rather than the traditional concept of two and a half years old or even three years old before the start of brushing teeth, in our clinic the youngest children, less than a year old already have more than one carious teeth. So children from a young age to develop oral hygiene habits, learn to brush their teeth in a reasonable way. It can effectively remove most of the bacteria in the mouth and reduce the formation of dental caries. 3, should pay attention to the children’s dietary habits Eat more rough, hard and fibrous food, the surface of the teeth have rubbing clean role, reduce the accumulation of food debris. Eat more natural food, healthy food, such as vegetables, fruits, meat, eggs, fish and shrimp, etc., try to avoid eating sweet and sticky food, such as: all kinds of sugar, chocolate, cookies, candied fruit, etc., sugary drinks on children’s dental health is the most harmful. These sweets, drinks contain sucrose, maltose and other strong caries-causing effect, parents should limit the children’s sugar-sweetened beverages and sweets intake, reduce the frequency of use, after eating with water or tea rinse mouth, usually pay attention to drink more water, to prevent saliva in the mouth is too viscous, and increase the incidence of tooth decay. 4, enhance the caries resistance of the teeth is mainly through the use of some fluoride to change the enamel surface or the structure of the surface, enhance the teeth acid resistance. In recent times, the methods that are considered to be more effective are: fluoride coating on the tooth surface, brushing with fluoride toothpaste, rinsing with fluoride solution, etc. The use of fossa sealant to close the molar teeth will increase the occurrence of caries. The use of fossa sealant to close the fossa on the occlusal surface of the molar teeth to prevent the occurrence of fossa caries. 5, regular oral examination The last very important point is that children must be regular oral examination. Children should be examined every three months or every six months, in order to detect caries early and fill in early. If shallow caries can be detected and treated early, it can not only stop the development of caries, but also restore the form and function of the teeth, and at the same time, the treatment is easy to operate, and the fillings are not easy to fall off. Regular oral checkups should start at the age of one or two years, and continue until the permanent teeth have fully erupted at the age of about 14 years, after which you can have a dental checkup every six months to once a year, and even adults need to have regular oral checkups every year. Regular oral checkups are not only for dental caries, but also for early detection of malformations affecting facial development such as uneven teeth and diastema, so that the best time for treatment will not be missed.