The quality of a person's teeth greatly affects a person's appearance, so orthodontics should start from a young age. Orthodontics is generally divided into three stages: deciduous teeth stage, orthodontic optimal age replacement stage and orthodontic optimal age permanent stage. The best age for orthodontics is 8-20 years old.

Primary tooth stage

Deciduous period generally refers to the time when children are 4 or 5 years old. At this time, children can take the opportunity to shape their teeth without changing their teeth. After he changes his teeth, all his teeth will grow neatly.

Dentition replacement stage

Changing teeth is also a good time. Girls are generally 7- 10 years old, and boys are generally 8- 12 years old. At this time, new permanent teeth began to erupt, teeth grew rapidly, and occlusion was unstable, which was the frequent period of tooth deformity. The main reason is that deciduous teeth fall off prematurely, which leads to the reduction of dental arch length, which in turn leads to the inability to arrange teeth. Such children should be regarded as gap holders.

Permanent tooth stage

The deciduous teeth have all been replaced, and the eruption of the second and third big teeth is another rapid growth period, generally around 12 ~ 18 years old. At this time, the diagnosis of tooth deformity is relatively clear, and it is also fast and stable to correct it in this rapid growth period.