After orthodontics, you can usually eat in a few hours. Generally, you will get used to it in a week or so after wearing the appliance. As long as the teeth are not painful or sour, you can eat them. A week or so varies from person to person. You can eat some soft food or liquid food a few days ago without chewing too hard. Remember to do good oral hygiene. Don't eat hard food, such as sugar cane, ribs, crabs, popsicles, snacks with cores and shells, etc., because eating such food requires hard biting or chewing, which will loosen the appliance, deform the orthodontic wire and affect the movement of teeth. Affect the plastic effect.