1, deciduous teeth stage: children's deciduous teeth are irregularly arranged, and the best treatment age is 3~6 years old. At this time, children's deciduous teeth are relatively stable, and the course of treatment can last for about 6 months through oral appliances. Early treatment is of great benefit to the normal development of children's teeth. If it is not corrected in time, it may aggravate the deformity.
2. mixed dentition: the age is about 7~ 1 1 year. At this time, the teeth grow rapidly, which is the frequent period of tooth deformity. The main reason is tooth deformity caused by bad oral habits or hobbies. At this time, it is necessary to use movable or fixed appliances according to different situations, and even cooperate with external plastic forces to correct the row of teeth.
3. Permanent tooth stage: the average age is 12~ 18 years old. Generally, at this time, all the deciduous teeth have been replaced, and the second big tooth and the third big tooth are in the rapid growth period. At this time, the diagnosis of tooth deformity is relatively clear, and it will be corrected for a long time in this life, with fast speed and stable correction effect.