Many patients are worried that orthodontic treatment will make the teeth loose, reduce the service life of the teeth, in fact, orthodontic treatment is a kind of teeth in the physiological range of movement, in addition to a very small number of patients with specific physical characteristics will be caused by the treatment of obvious root resorption, will not have a significant impact on dental health, teeth in the process of the treatment of the temporary loosening is inevitable and normal, the completion of the treatment will disappear naturally. But orthodontic treatment aggravates the burden on the teeth, and due to the presence of orthodontic attachments to increase the difficulty of oral cleaning, if oral hygiene maintenance is unfavorable, will promote and aggravate gingivitis to periodontitis, secondary dental caries, so orthodontic treatment of oral hygiene maintenance is crucial, it affects the effect of the treatment and dental health, adults and patients who have suffered from periodontal disease is particularly important, if the oral hygiene maintenance is unfavorable, it is inevitable to the If oral hygiene maintenance is unfavorable, it will inevitably cause irreversible effects on dental health. Some patients are also hesitant to have their teeth extracted because of orthodontic treatment, fearing that the reduction in the number of teeth will have any adverse effects or that the extraction gap will not be closed. In fact, a lot of malocclusion is because the jawbone can not accommodate these existing teeth will occur, extraction is to create a gap to align the teeth, adjust the bite relationship, is to achieve aesthetic and functional perfection, is conducive to oral health, and will not be left gap. Yuan Fang, Department of Orthodontics, Urumqi Stomatological Hospital, Urumqi, China