If a healthy person has no obvious and significant systemic diseases, and usually the person is basically in good health, basically the teeth that need to be extracted can be extracted in this case. For deep caries, there is such a characteristic, because deep caries has occurred for a long time, and bacteria have been multiplying in this tooth for a long time. Often, when examining the patient, the tooth has been decayed to a mess, maybe the crown has been decayed, or even only part of the crown is left, and some even more serious patients only have part of the root left. In this case, when the doctor examines the patient, he or she will also ask the patient to take another film, i.e. an X-ray, through which the inflammation of the tooth root can also be determined. Because the roots are inside the bone, they cannot be judged by the naked eye, so they are judged by x-rays. If there is inflammation of the tooth root, including the examination of the patient, if there is obvious discomfort during the examination, the patient will be advised to take anti-inflammatory medicine for a few days, and then go to the oral and maxillofacial surgery to extract the deep caries that have decayed and cannot be retained after the pain and discomfort are gone.