If the broken root is present or may cause lesions, it will be extracted; if there is no obvious lesion and the trauma of root extraction is too great, it will be kept for observation and suspended for extraction, as follows. 1. The existence of broken roots or may cause lesions: for the existence of periapical tissue disease of broken roots, in principle, should be removed. In addition, if the broken root may affect the normal healing of the extraction wound, cause inflammation or pain, or may become a chronic lesion, resulting in local infection, causing pus and other symptoms, it should be removed. 2. Asymptomatic broken roots and excessive extraction trauma: For broken roots without obvious periapical lesions, if the removal of the root may cause nerve damage, maxillary sinus perforation and other complications, the broken root can be retained for observation, and the extraction can be postponed. It is recommended to go to a regular medical institution for consultation and targeted treatment with the help of a doctor.