If the tooth is broken in the pulp, i.e. the tooth is broken below the gingival margin, root canal treatment or tooth extraction will be considered depending on whether the tooth can be preserved or not. 1. Root canal treatment: If the root of the tooth is in good condition and the fracture site is located more than five millimeters below the gingival margin after the radiographic examination, root canal treatment can be done first, and then consider doing the pile core crown restoration at a later stage. 2. Tooth extraction: If the fractured part of the tooth is located under the gingival margin and the root cannot be retained or the inflammation is aggravated and cannot be retained, it is necessary to consider tooth extraction and then prosthetic restoration. Fractured teeth in the gums are recommended to go to the hospital in time to take pictures to determine whether the teeth can be retained, if they can be retained as soon as possible for treatment, can not be retained as soon as possible for extraction.