Tooth decay can cause great damage to teeth, and untreated tooth decay can lead to cavities and serious tooth loss. Why do children suffer from tooth decay? The following is to understand some reasons why children suffer from dental caries. 1.When the teeth just erupted, the calcification degree of teeth is low, the surface is not smooth and there are many micro-pores, so the teeth have poor acid resistance and bacteria are easy to attach to the tooth surface to form plaque, so it is easy to occur caries. 2.The first teeth, especially the sulcus, fossa, and point gap on the occlusal surface of young permanent teeth are many and deep, which are easy to make the food embedded and stagnant and hide the bacteria, and it is not easy to clean by brushing and rinsing, so it is easy to get caries. 3, children’s teeth chewing function is weak, eat mostly soft food, and often contains a lot of sugar, easy to ferment and produce acid, easy to occur caries. 4, like to eat snack mouth at present, children’s food is mostly high sugar content, thick, soft and fine food, such as cakes, bread, cookies, all kinds of candy, milk and all kinds of drinks, etc. are children’s favorite food. These foods are easy to ferment and produce acid on the surface of the spear for a long time, and erode the teeth and cause tooth decay. 5.Children sleep for a long time, and their mouths are at rest during sleep, so the saliva secretion is reduced, the flow rate is low, and the mechanical flushing effect of saliva is reduced. Due to the decrease of saliva secretion, some antibacterial substances and lysozyme in saliva are beneficial to dental health and the amount is reduced, which is conducive to the reproduction of bacteria, some children with bad habits, such as the bad habit of eating bread and pastry before bedtime and going to bed without brushing teeth, some children have the bad habit of containing? The bad habit of sleeping with sugar etc., so it is more likely to induce caries. 6, parents often think that the milk teeth are temporary, rotten does not have much influence, so they do not pay enough attention to children’s caries and fail to treat it timely, which inevitably increases the factor of caries development. Some of the above factors that make children suffer from caries can be eliminated, as long as you do not spoil your children, and can correct some bad habits, pay attention to oral hygiene, and take some necessary anti-caries measures, the chance of children’s milk teeth suffering from caries can be obviously reduced. 7.Poor oral hygiene. Infancy can not brush teeth by themselves, most of children brush teeth, not seriously, and the method is not correct. Because of young and ignorant, children almost all have the bad habit of eating snacks and not cleaning teeth. When asked how many times a day a child brushes his teeth and how long each brush lasts, parents often reply that “brushing is a formality, and each brush lasts 30 seconds or a few seconds”. This kind of bad habit of treating one’s teeth sloppily, of course, is easy to get caries.