The most appropriate time for children to have their teeth straightened is generally after the baby teeth have largely been replaced as permanent teeth. The best age for orthodontics for girls is around 11-13 years old, while boys are more suitable for orthodontic treatment at the age of 12-14. This is the period when permanent teeth are just erupting and the teeth are very plastic, so if you go for orthodontic treatment, the difficulty is relatively minimal and the results are the best, and the time spent is also the shortest. If your child misses the early stage of permanent teeth, orthodontics can be done at the age of about 15-17. This is the period when the child is in adolescence, the bone development is more active, faster, correction than the permanent teeth a little more difficult, but the orthodontic effect is still very good.