Lingual orthodontics is done through laser three-dimensional scanning, and then using the latest computer technology to complete the modeling design on the computer, precision casting brackets, and finally complete the precise molding of the arch wire. Lingual orthodontics avoids the impact of traditional wire orthodontics with braces on the aesthetics, and the braces of lingual orthodontics cannot be seen from the appearance, and the correction is very aesthetically pleasing and natural at the same time. Not only is the size more accurate, but also easy to install, very humanized. But at the same time there are certain risks of orthodontic treatment, mainly the following: 1, alveolar bone compression resorption: mainly occurs in adults, because the adult jawbone development has ended, if a certain amount of pressure is exerted later, it will lead to alveolar bone resorption; 2, recurrence of disorders after orthodontic treatment: occurs in adults, it is recommended that in the best orthodontic age of 12 years old, in time to correct the teeth; 3, root resorption: if the In the orthodontic treatment process traction force is too large, will lead to a certain degree of root resorption, the more serious will even induce root resorption of a large area; 4, excessive tilt of the teeth: teeth move after the degree of tilt, depending on the size of the force, the teeth of the force site and the teeth of the original tilt. The force is too large, the point of application of force from the gingival margin is too far, will make the fulcrum to the direction of the crown transfer, thereby increasing the degree of tilt of the teeth.