Malocclusion has its indications at every age. If you correct it at the right time, you can get twice the result with half the effort. For example, deciduous teeth have malocclusion. In order to prevent maxillary hypoplasia and mandibular overdevelopment in the later stage, early correction was selected at the age of 4-5. At this time, the root of deciduous teeth has been fully developed and has not been absorbed, which is a good period. However, if it is in the mixed tooth stage and permanent tooth stage, it may be repeated and need to be followed up as soon as possible. Early treatment of skeletal malocclusion is a very good period for girls aged 8- 10 and boys aged 9- 12. There are some bad habits during this period, such as biting fingers, biting pencils, sticking out your tongue, breathing and snoring. Early occlusion treatment can control the maxillary and maxillary deformities. In this period, maxillary hypoplasia and mandibular overdevelopment are prone to occur, or micrognathia with maxillary overdevelopment and mandibular hypoplasia needs to be blocked and corrected as soon as possible. The malocclusion of girls is 1 1- 14 years old, and that of boys is 12- 15 years old. Blocking treatment in the early growth stage and peak growth period can achieve good results. Most malocclusion occurs in the early stage of permanent teeth. Girls 1 1- 14 years old, boys 12- 15 years old. At this time, the permanent dentition has been completed and the adaptability of soft and hard tissues is very good. It has great potential and the efficiency of tooth movement will be higher. This period is the golden age of orthodontic treatment. Osteomalocclusion with obvious genetic tendency can only be completed by the combined treatment of orthodontics and orthognathic surgery after the jaw is fully developed 18-20 years old. Shijiazhuang yongqi dentistry