Periodontal disease is one of the two major diseases that jeopardize human dental health (the other disease is dental caries). The etiology of periodontal disease can be generalized into local factors and systemic factors: local factors to poor oral hygiene caused by dental calculus, plaque production on the destruction of the periodontium is the main; and systemic factors and genetic, immune, hormone levels, mental stress and so on. Clinical manifestations of periodontal disease are bleeding from brushing; gums are red, swollen or abscessed; the alveolar bone is gradually destroyed after the teeth began to loosen, deformation, such as untreated, the alveolar bone is destroyed to a certain extent, then the teeth will fall out; in the process of periodontal disease, sometimes there will also be a retrograde pulpitis, which will bring intolerable pain to the patient. The harm of periodontal disease can be divided into the following two aspects: 1, oral function damage. Due to the loosening, displacement and even loss of teeth, it will inevitably affect the patient’s chewing and pronunciation functions. 2.Systemic damage. Periodontal disease may be related to cardiovascular disease, digestive disease, respiratory disease, preterm labor and low birth weight children. 3.Psychological damage. Patients with periodontal disease are often accompanied by bad breath, which affects the patient’s verbal communication with others. In addition, patients with severe periodontal disease, due to pathological displacement of teeth, often presenting serious malocclusion, the most common is a large gap between the teeth, and spread to the lips. The patient’s appearance is affected. Based on the above description, we can know that patients with periodontal disease often suffer from psychological damage, such as low self-esteem. The treatment of periodontal disease is currently based on cleaning, periodontal surgery and teaching patients about daily periodontal maintenance. In the vast majority of patients, periodontal disease can be controlled so that it does not progress, and in some cases, the damaged periodontal tissues can be restored to a certain extent, as long as they are treated properly and in a timely manner. As we discussed above, is it possible to treat malocclusion caused by periodontal damage? The answer is yes. But it is also easy to think that orthodontic treatment of periodontal disease is also quite complex. The complexity is mainly manifested in the following points: 1. Orthodontic treatment of periodontal disease requires the cooperation of at least two departments, periodontics and orthodontics. The treatment of periodontics is the foundation, only after the perfect periodontal disease treatment is completed, the periodontal condition is stable and no longer progresses, then orthodontic treatment is possible. That is why orthodontic treatment of periodontal disease is now basically only done in specialized hospitals, by a few specialized doctors. There is a huge gap between the treatment needs and the services that can be provided. 2. Orthodontic treatment for periodontal disease is associated with certain risks, mainly due to the fact that teeth that are severely damaged by periodontal disease may appear to be aggravated during treatment if they are not properly maintained, and may even lead to tooth loss. Of course, if the treatment program is well-designed, periodontology and orthodontics doctors work closely together, and patients strictly follow the medical advice, this situation can generally be avoided. 3. High cost. Due to the complex treatment involving two departments, the cost is relatively high. At present, periodontal treatment is covered by medical insurance, but orthodontic treatment is not. 4, aesthetic problems. Since periodontal disease is generally dominated by people above middle age, there is obviously a great aesthetic problem if traditional metal braces are used. The solution is that you can use ceramic braces, or invisible braces without brackets. One of them, Invisalign, is a very suitable method for periodontal disease treatment, because of its: 1) light force; moving teeth slowly and steadily; it can play the role of periodontal splint; it can be removed by itself, which is convenient for brushing teeth. In this way, it is beneficial to periodontal health. 2) Fully invisible, to meet the needs of invisible orthodontics for special populations. Of course, the cost of full invisible orthodontic treatment is also higher. 5. Maintenance problems after treatment. After periodontal treatment, periodontal maintenance treatment is needed periodically. And the maintenance after periodontal orthodontic treatment is also stricter than the maintenance of general orthodontic treatment. Generally need to be maintained for life. The author prefers to use lingual fixed retention, which is beautiful and comfortable, and has a periodontal splint, which is more conducive to periodontal health. So what are the benefits of orthodontic treatment of periodontal disease: 1, health, is conducive to improving the occlusion of the teeth, the formation of a good occlusal relationship, thereby stabilizing the periodontal disease or even promote the restoration of the function of the periodontal part of the damage has been done. 2, psychological aspects, due to improved aesthetics, the patient’s psychological condition and self-esteem will generally be improved accordingly, which in turn will improve the patient’s quality of life. To summarize: 1, periodontal disease in the periodontist and orthodontist cooperation, can be orthodontic treatment; 2, orthodontic treatment of periodontal disease is more complex than the general orthodontic treatment, the cost is also higher; 3, orthodontic treatment of periodontal disease for patients who are very concerned about aesthetics, the use of bracketless orthodontic treatment is desirable; 4, periodontal disease by scientific orthodontic treatment, the patient in the functionality, aesthetics, mental health will be improved. The patient’s function, aesthetics and mental health will be improved after scientific orthodontic treatment.