Acute periapical periodontitis is relatively well treated because it is a very common disease in clinical practice, and the treatment protocols and procedures are very mature and well established. From this point of view, the treatment of acute apical periarthritis is not difficult, but at the same time, it should be known that acute periarthritis means that the damage to the tooth has reached a more serious degree, and it is not a simple caries, it is much more serious than caries. For acute periapical infection, root canal treatment is required, which means that the pulp of the tooth needs to be removed. After the pulp is opened, the necrotic pulp is removed, the inflammation of the pulp cavity and the inflammation of the root tip are fully drained, the medication is changed intermittently, and after the drainage is complete, the root canal is expanded and the canal is filled with dental cement and paste, which is a perfect root canal treatment. After root canal treatment, it is also recommended to apply crown restoration to protect the tooth’s crown. In this way, the whole process of treatment of periapical periodontitis is completed.