Milk, Mixed Teeth

3-12 years old deciduous dentition, mixed dentition, early permanent dentition in Angel's class I, class I, Sichuan class malocclusion.

a) It is suitable for early correction between 4-6 years old and 8-10 years old

b) Children aged 7-8 are not necessarily contraindicated. Since they are in the stage of replacement of primary and permanent teeth and their teeth are relatively loose, the treatment can be delayed for half a year, and can be carried out after 2-2 replacements are stable, and bad habits can be corrected during the waiting period.

c) The retention of 4 Heng 1/Milk 1 and 4 Heng 6 has erupted better, and it is suitable to use invisible aligners.

d) Patients with abnormal muscle function need to be corrected with muscle function training at the same time.

1. Pediatric patients who cannot cooperate.

2. In the mixed dentition stage, if the number of missing teeth in one jaw and one side is more than 3, it is recommended to wait for the eruption of the permanent teeth before treatment.

3. In the mixed tooth stage, the eruption height of the crown is less than one-half. It is recommended to wait for two-thirds of the crown to erupt before treatment.