1. Affects the normal eruption of permanent teeth. Healthy deciduous teeth can guide the normal eruption of permanent teeth, once the deciduous teeth are not treated in time, it can lead to inflammation of the root of the deciduous teeth, and the permanent tooth embryos struggle to survive in such a harsh environment for a long time, and their development will be affected, and the permanent tooth enamel dysplasia or permanent tooth ectopic eruption will occur.
2. Affects chewing and causes malnutrition. Deciduous teeth are damaged to a certain extent, and the child will have toothache, affecting the appetite. Grinding teeth are rotten, chewing function is reduced, and many foods cannot be eaten, which may lead to children not loving to eat; on the other hand, food is not fully chewed into the gastrointestinal tract, which not only increases the burden on the gastrointestinal tract, but also affects digestion and absorption, resulting in malnutrition.
3. Affects aesthetics and mental health. If the front teeth become black or fall out prematurely, they may be ridiculed by other children, and when they speak, they will bow their heads, wrap their mouths, do not like to laugh, or speak quietly, slowly becoming less confident, affecting the child's mental health. Affects language development. If the front teeth fall out prematurely because of caries, the pronunciation will "leak air", affecting the child's normal speech.
![Is it normal for children to change their teeth late, and the newly grown permanent teeth are yellower than deciduous teeth?[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)