Many parents think that the milk teeth will be replaced in the future, so there is no need for treatment, but do not know that the milk teeth have a great role, such as the occurrence of lesions without timely treatment, can cause serious consequences, the following is introduced, I hope that parents pay attention to give their children a healthy set of teeth. 1, milk teeth is an important part of children’s chewing organs. Children grow fast, metabolism, daily diet requires a certain amount of nutrition to protect the needs of growth and development. Only healthy milk teeth can play a normal chewing function, only to facilitate digestion and absorption. If the teeth are not good, the child will not be able to chew well, and large pieces of food will enter the stomach, affecting digestion and absorption, and increasing the burden on the stomach. Some children develop bad habits of partial eating, such as not eating vegetables and lean meat, in order to avoid the pain caused by eating, such as toothache and stuffed teeth, which causes malnutrition and affects the normal growth and development of children. There are also children who chew exclusively on the other side because of toothache on one side, which is called lateral chewing. The side that is not used has no self-cleaning effect of food, and over time it becomes filled with tartar. Tartar and its surface plaque (a bacterial film, which is the main causative factor of caries and periodontal disease) stimulate the gums and make the gums inflamed, resulting in flabby, red, swollen and bleeding gums. 2.Healthy milk teeth give functional stimulation to the bones and muscles of the jaw and face when chewing, so that the jaw and face develop normally. In children who chew on the lateral side, there is no benign stimulation for chewing on the side that is not used, which affects the normal development of this side of the jaw and face and makes the face asymmetrical. 3, in the beginning of the eruption of the milk teeth and the milk teeth period is an important period for children to start learning to speak. A complete row of milk teeth is very important for the normal pronunciation of children, especially the upper front teeth. Children with missing upper front teeth cannot pronounce labiodental and linguodental sounds, which seriously hinders the acquisition of language. 4.White and healthy teeth are very important for children’s appearance and physical and mental health, especially the upper front teeth. When the upper front teeth are missing prematurely or darkened due to decay, it affects the beauty, makes children afraid to laugh in front of everyone, affects communication, and brings bad stimulation to children’s psychology. When most of the teeth are missing, due to the lack of support, the face will be sunken, very much like a little old lady without teeth. 5, the milk teeth play a “guide” role for the eruption of permanent teeth. When the child is about six years old, the first permanent molars (also known as “six-year-old teeth”) will erupt in the second milk molar far, the teeth can be aligned. If the second molar is lost prematurely, the first permanent molar will erupt without a “guide”, and it will be displaced to the proximal center, partly according to the original position of the second molar, or tilted to the proximal center, and the permanent teeth will be misaligned. Similarly, under the root of each baby tooth there is a germ that inherits the permanent tooth. When the baby teeth are replaced, they are lost and the permanent teeth grow in the same position as the baby teeth. If the baby teeth are lost prematurely, the neighboring teeth will be displaced and the space originally occupied by the baby teeth will be reduced. Inherited permanent teeth will erupt out of abnormal position due to lack of space, resulting in misalignment of permanent teeth. 6, premature loss of milk teeth can also make the inherited permanent teeth erupt too early. The permanent teeth that erupt too early have immature root development and short roots, which cannot withstand the pressure of chewing and can be easily loosened or even fall off. 7.If the decayed milk teeth are not treated, it can cause pulp and apical lesions. When the apical lesion can affect the development of the inherited permanent teeth, resulting in incomplete enamel development, yellowish brown teeth, defective tooth surface, poor acid resistance, and easy to get caries.