Root canal overfill is asymptomatic and requires no treatment. If an inflammatory reaction occurs after overfilling the root canal, it is necessary to re-fill the canal or perform apicoectomy. If there are no clinical signs of overfilling, it will not affect the treatment result and no special measures can be taken. If too much filling material during root canal treatment may irritate the pulp, causing tooth pain and easily inducing pulpitis. In this case, it is necessary to clean up the original filling material in the affected area and then re-fill the treatment. In addition, an overfilled root canal needs to be removed by apicoectomy, which can be performed by cutting the apical tissue to remove the filling material. It is recommended that patients who have overfilled their root canals after root canal filling treatment need to seek medical attention in time, and can choose the appropriate measures for treatment under the guidance of the doctor. For patients with no symptoms, no treatment can be carried out, but regular follow-up. In addition, patients should keep their mouths clean after root canal treatment, avoid eating hard food, and rinse their mouths in time after each meal.