Generally speaking, adult patients refer to those who have stopped growing and are over 18 to 20 years old. Because of the improvement of life and education, they have a clear and urgent need to receive orthodontic treatment for themselves. There are often office workers who are distressed by their uneven teeth and feel that their smile is not beautiful and confident enough, and some even feel that their “smile” problem directly affects their promotion at work and the success of their relationship. There are also some patients because of the growth of various occlusion problems left during the development period is becoming increasingly serious, causing inconvenience in diet and life. In fact, adults can also undergo orthodontic treatment, 20 years old can, 30 years old can, 40 years old can, even 50, 60, 70 years old can, with the modern orthodontic technology has become increasingly mature and sophisticated, as long as the periodontal tissue is healthy, bone metabolism is normal adults can receive orthodontic treatment. I have a patient who is a fashionable grandmother of about 60 years old! Although her teeth are not straight, she usually pays close attention to oral hygiene and her teeth are very well protected, so she can still have braces at the age of 60. Since age is not a problem, what other problems are there? The health of the bones as well as the mouth itself in adulthood is important! Adults have mature bones and cannot use their growth spurt to move their teeth large distances (8mm or more) like children can, but simple tooth movement is possible. Simple tooth movement is possible, such as aligning crowded teeth, adjusting rotated teeth back to their original angle, straightening tilted teeth, and improving the overgrowth of teeth due to the long-term lack of bite, all of which can be done through orthodontic treatment. In the case of protruding teeth, severe retrusion, or lack of space for dentures in the upper and lower dental beds due to long-term missing teeth, etc., surgical treatment is required in conjunction with maxillofacial surgery. Many of our friends’ teeth are prone to problems such as tooth decay, missing teeth, periodontal disease, etc. because of “long-term service, no rest in the year”, which are obstacles on the road to orthodontics. The foundation is well protected, when you want to align their teeth row beautiful, will have half the effect. Of course, adult orthodontic treatment in addition to the condition of the teeth themselves, the human factor is also important to the success or failure of orthodontic treatment. On the one hand, adult patients have more complex oral conditions, the final treatment effect and children when orthodontic treatment is certainly a gap, so the patient itself must have a clear understanding of this, must have good communication with the attending physician before the operation, a reasonable understanding of the final outcome. Secondly, the treating physician must be more patient with adult patients, who have higher requirements for service and are more fearful of orthodontic treatment than children and are more eager to receive care from the physician.