Before removing the wisdom tooth, a curved tomography or CT examination is first performed to determine the location and growth direction of the wisdom tooth. Ancillary examinations can be performed to understand the number of root tips and roots of the tooth, or the degree of curvature of the root, or the relationship with important anatomical structures, the neural canal, and the relationship with the maxillary sinus. If there is a close relationship, minimally invasive examination methods and treatment methods are needed for surgical treatment. At the same time, when the auxiliary examination is performed on film, some tests such as blood routine, blood sugar and local examination of teeth can be taken to make a judgment. Therefore, the auxiliary examination is very critical. Through some auxiliary examinations, the possibility of infectious diseases can be ruled out and prevented in advance during the operation to prevent cross-infection, so that the preoperative examination is very important.