You can usually eat within 1 to 2 hours of having a root canal, but it is recommended that you do not chew food with a root canal treated tooth until a day later. Root canals are usually performed several times, and the treated tooth will need to be temporarily sealed with materials during the treatment, and permanently filled with materials at the end of the treatment. However, both temporary fillings and permanent fillings require a certain amount of time to solidify, and if the material is chewed or eaten during the time it is not fully solidified, it can easily deform the material and cause damage to the tooth. Generally, after root canal treatment, if there is no discomfort, the patient can eat after 1 to 2 hours, and it should be noted that only the healthy side of the tooth can be used to chew food. After 24 hours, the material has completely solidified and you can properly chew with the affected side. Meanwhile, for patients with pulpitis and periapical inflammation, eating and chewing with the affected side should be delayed appropriately. It is recommended to eat finer and softer foods.