What is adult orthodontics Orthodontics is the correction of teeth and the release of malocclusion. Orthodontics is the study of the etiology of malocclusion, its diagnosis and analysis, and its prevention and treatment. The English name of orthodontics comes from the combination of three Greek roots, which mean “tooth”, “orthodontic” and “discipline”, that is, what we call “orthodontics”. Clinically, it has been found that more and more adults are coming into orthodontics for social, professional and aesthetic needs. Adult orthodontic patients are mainly divided into two categories, one for no other oral diseases, the main purpose of the visit is to align the teeth and solve the aesthetic problems; the other category which is accompanied by other oral diseases, such as periodontal disease, temporomandibular joint disease, etc. The difference between adult orthodontics and children’s orthodontics Adult orthodontic treatment is gradually becoming more and more widespread, but there is a considerable difference with orthodontics for adolescents and children. While we strive for perfection in orthodontic treatment for adolescents and children, adult orthodontics is based on the patient’s main purpose and the doctor tries to meet their requirements. Generally speaking, the growth period is indeed the best time for fixed orthodontic treatment. When the rapid growth period of youth (generally 11 to 13 years old for girls and 12 to 14 years old for boys), tooth replacement is basically completed and the jaws still have developmental potential, this is the best time for fixed orthodontic treatment, and most of the malocclusions can be resolved at this time. The growth of adults has stopped, bone metabolism and alveolar bone reconstruction is slow, the teeth move relatively slowly, the required orthodontic treatment time is longer than that of children, orthopedic treatment of the jaws has little effect. If the teeth are only misaligned, the impact of adulthood is not particularly large, but the impact of skeletal correction, such as the chin is too long to close a little, the disadvantage of treatment after adulthood is obvious. For serious bony malocclusion, if orthodontic treatment alone cannot achieve satisfactory results, surgery with orthodontic treatment is needed to solve the patient’s requirements. In addition, adults have a higher rate of dental caries, and many patients also suffer from periodontal disease at the same time, and the phenomenon of missing teeth, residual crowns, residual roots, etc. is also very common, plus the presence of serious tooth wear and systemic diseases and other factors, which all lead to adult orthodontics is more difficult than adolescents. The characteristics of adult orthodontics 1, the orthodontic treatment time is longer than that of children, and the difficulty is relatively large; 2, adults are often accompanied by other diseases and have high oral health requirements; 3, adults have high aesthetic requirements due to work and other reasons. Sometimes it is necessary to use clear aligners or lingual aligners; 4. The tendency of relapse after treatment is greater in adults than in children, or they need to be maintained for a long time; 5. The symptoms of discomfort during treatment or more obvious.