Orthodontic mainly have the following precautions: 1, wearing fixed braces can not eat too hard food, otherwise more than the braces of the bearing force is easy to lead to orthodontic appliances fall off, affecting the effect of orthodontic treatment and course of treatment; 2, wearing braces is easy to residual food residues and increase the difficulty of brushing, patients need to use more time every day to brush their teeth, once brushing for 3-5 minutes to brush the teeth clean, otherwise orthodontic completion of the caries there may be more; 3, do not drink too much pigmented beverages, in the period of orthodontic appliance or rubber band orthodontic staining to affect the aesthetics.