In fact, there is no exact age limit for orthodontic treatment. If patients find malocclusion, we can go to the hospital stomatology or orthodontics department for treatment at an appropriate age. For example, patients with babies should be corrected during defoliation, corrected at the age of three or four, corrected at the age of seven or eight, and may need correction after the age of sixteen. If it is a patient with irregular dentition and crowded dentition, it may be done at the age of 1 1~ 13, but if the best orthodontic age is missed, adults can actually correct it. At present, many adult patients choose to do orthodontics, but the older they are, the more difficult it is.