Hard food, such as sugarcane, ribs, crabs, ribs, chicken, drumsticks, beef and snacks with shells, should be avoided as far as possible, because eating these foods will take a lot of effort to bite or chew, which will loosen the appliance and deform the teeth by biting the orthodontic wire. Too sticky foods should also be avoided, such as maltose, rice cakes, glutinous rice products, chewing gum, toffee, etc., which will stick to orthodontic appliances and orthodontic wires.

Foods with high sugar content should be avoided as much as possible, such as candy, biscuits and other common snacks. In order to avoid tooth decay, it is best to eat less during or after orthodontic treatment and try not to drink drinks with high sugar content, such as cola, sprite and juice. Tooth movement depends on the absorption and deposition of dental bone, and a balanced diet is helpful to tooth movement.

If the nutrition is not balanced during the treatment, the effect of the treatment will be carefully affected, so we should pay more attention to a balanced diet, eat more fruits and vegetables, and supplement more vitamins to relieve oral ulcers and angular stomatitis. Many friends who have appliances respond to the stimulation of appliances, and they are more prone to oral ulcers or bad mouth than ordinary people. They should consciously supplement enough vitamins.