The treatment of apical periodontitis is mainly root canal treatment, other surgical treatments, and tooth extraction. 1. Periodontitis is usually secondary to endodontics, which is an inflammation of the tissues around the root tip, and patients often suffer from toothache, occlusal pain, and pus in the gums. The main treatment for apical periodontitis is endodontics, in which the root canals are cleaned, shaped, disinfected and sterilized to remove the abnormal substances in the lesion and restore the local tissues to normal. 2. In addition, according to the specific conditions of the patient can also be carried out apical induction molding, apical surgery and other treatments, if the treatment effect is not good, or the degree of destruction of the tooth body is more serious and difficult to recover, the diseased tooth can also be directly extracted to prevent further infection and lesions. It is recommended that patients with apical periodontitis undergo early treatment to avoid aggravation of the condition.