Generally, there is no age limit for braces, but there is the best age for braces. Generally, after replacing all the baby teeth, about 13 or 14 weeks old is the most suitable age for orthodontic treatment. Patients at this age are still in the stage of growth and development, and the jawbone is also developing, so it is easier for orthodontic treatment to move the teeth or traction jawbone growth, and the orthodontic effect is more satisfactory after the operation, and the whole orthodontic treatment will be shortened. Some patients above this age, who are 20, 30 or even 40 years old, can also do orthodontic treatment with braces, but it will be relatively more difficult and the whole orthodontic treatment course may be relatively more. It is recommended that patients with intra-oral malocclusion or crowded and misshapen teeth should go to the hospital for orthodontic treatment when they are young, rather than wait until they are very old and miss the best time for treatment.