Crooked teeth can be corrected at the age of 8. But it needs to be determined after a radiographic examination. Orthodontic treatment does not depend on the age of the patient, and the earlier the orthodontic treatment, the shorter the time required. When teeth are crooked, many people are not confident enough to smile or speak loudly. For the sake of aesthetics, they may request orthodontic treatment. Orthodontic treatment requires an interview, photographs, and a plan. The earlier the orthodontic treatment is started, the more plastic the bone is and the shorter the tooth movement time is. The external force required for orthodontic treatment is relatively small and the pain is relatively reduced. Orthodontics requires a high level of professionalism from the doctor. Communicate fully with the doctor and choose the most suitable program to achieve the desired results as much as possible.