12-year-old children can choose to correct irregular teeth after changing teeth. It is very important to have your teeth done. It is recommended to choose a professional beauty hospital. Our side is a professional stomatological hospital with strong pertinence. We have been specializing in tooth making for more than ten years, and correction is also our specialty. Orthodontics can be divided into two categories, orthodontics and crown orthodontics. 12 years old can do orthodontic correction after changing teeth. Full or half mouth correction takes about 1-2 years, depending on the complexity of teeth. Crown orthodontics is aimed at a single ugly tooth. It can be done after the alveolar bone is well developed around 18 years old, and you can come to the hospital twice in 7 days. I suggest you go to the hospital as soon as possible to check your child's teeth and choose the most suitable correction plan according to the results!