Hello, the best age for orthodontics is 12- 16 years old. If the child's dentition is serious, you can consider correcting it in advance. Because all aspects of children are in the growth and development period during this period, orthodontic treatment has a quick effect and a short time. Adults can do orthodontics with the same effect, but it may take a little longer than children (about two and a half years). Adult orthodontics is generally better under the age of 30. Because periodontal disease and unhealthy gums will affect the orthodontic effect, it is generally necessary to check the oral condition before making a decision.