There are several types of braces, but here we are referring to fixed orthodontics, that is, the kind that stick to the tooth surface and cannot be taken off by themselves. First, make sure that the braces do not fall off from the tooth surface. If they do, the precise control of the teeth will not be achieved and the treatment will be delayed. Therefore, patients are required to eat very carefully, do not eat too sticky and hard food, harder fruits can be sliced into thin slices, meat food to pay attention to eliminate the bones, nuts and hard cookies should not eat as much as possible. Second, to ensure oral hygiene. After wearing fixed orthodontic devices, the self-cleaning ability of the oral cavity is reduced, food residues are easily attached to the tooth surface, forming plaque, which causes tooth demineralization and gum redness and bleeding, affecting the health of teeth. Therefore, it is required to brush your teeth immediately after eating, you can choose children’s toothbrush or orthodontic special toothbrush, make sure to do thorough cleaning.