If only the root of the molar remains, it is also good to extract it. If root canal treatment or nerve killing treatment has been carried out, the tooth will become brittle and will fall out or fall off. During the extraction of this kind of tooth, care should be taken not to use too much torque or clamping force, which will cause the tooth and wall to fall off, and extra care should be taken when extracting. If only the root of the tooth is left, the extraction is easier, and the root can be removed without splitting the root, and the root can be extracted with a dental tappet. To confirm that the tooth is completely extracted, an X-ray can be taken to observe whether the root of the tooth is extracted cleanly.