It is not necessary to remove the root of the tooth, the specific need to be based on the length of the root, whether there is inflammation, the patient’s personal physical quality and other factors to be considered. 1. The length of the root: if the length of the remaining root is greater than 12mm, you can consider root canal treatment of the root and then play fiber piles; if the length of the remaining root is less than 10mm, the residual root generally has no value, it is recommended that it is best to extract and then veneer or dental implants. 2. Whether there is inflammation or not: it is generally recommended to take a panoramic film to analyze the whole mouth before veneering, if there is a root, and the remaining root tip of the root is not obvious inflammation or inflammation in a small range of cases, you can carry out root canal treatment on the residual root and then veneer; if the remaining root inflammation is too large, the effect of endodontic treatment is poor, it is recommended that the best extraction before considering veneering. 3. The patient’s personal physical quality: If there is a stump in the mouth, but the patient’s personal physical quality is not good, such as hypertension, heart disease and bleeding disorders and other contraindications to extraction, you can not remove the stump, and consider treating the root of the tooth can be embedded after the movable tooth.