Many parents have the misconception that the baby teeth will be replaced, so why spend money and time on treatment? It is true that from the age of 6 to 7 years old until 12 to 13 years old, the baby teeth are gradually lost and replaced by permanent teeth. However, the chewing power of the milk teeth is a functional stimulus that facilitates the growth of the jawbone and the eruption of permanent teeth. Therefore, it is extremely important for the healthy development of children to ensure the morphological and functional integrity of the milk tooth series. Preventive care of the oral cavity must begin with the deciduous teeth. Important roles of the baby teeth. Therefore, if the milk teeth lose some or all of their chewing function due to pathology, it will definitely constitute a major obstacle to the growth of children and plant the factor of “nutritional intake disorder” and “weakness and disease” in the future. 2. Inducing the eruption of permanent teeth: Since the milk teeth will fall out at a certain time and be replaced by permanent teeth, if the permanent teeth are to erupt correctly, the milk teeth must be induced and the proper space must be maintained by the milk teeth. For example, if the second molar falls out prematurely due to some disease or other factors, the second molar, which replaces it, is not yet developed enough to erupt, so the second molar is left vacant, and the subsequent “sixth age teeth” will be left vacant for the same reason that all milk teeth are the maintainers of the space needed to maintain the eruption of their secondary teeth. The premature loss of baby teeth can be replaced by artificial space maintainers, but they will not function any better than the original, naturally complete baby teeth. 3. Pronunciation and aesthetics: When children start to engage in social activities, if the baby teeth (especially the baby incisors) fall out prematurely or are broken and discolored, it will not only affect their aesthetics, but also their pronunciation, and they may be ridiculed or teased by their peers, which is undoubtedly a serious blow to their young and pure hearts. 4.Promote the normal development of jaw bone: Unilateral dental lesions often make children afraid to chew with the affected teeth, which may cause imbalance of facial development after a long time.