The suitable age of children's orthodontics is divided into several stages, including deciduous teeth, replacement teeth and permanent teeth. The correction of deciduous teeth is generally around 4 to 5 years old. Generally, the best orthodontic time for mixed dentition is about 8 ~ 10 years old. However, the orthodontic treatment in permanent teeth is generally around 1 1 to 14 years old. I hope those who seek beauty can understand the above introduction.