The treatment of pulp exposure is as follows: 1, pulp exposure caused by acute trauma: if the area of pulp exposure is small or short, the treatment of pulp protection can be taken temporarily, i.e., apply the medicine of nerve protection on the exposed area and leave it for observation. If the patient’s pain is mild, follow the doctor’s instruction to review it after 2-4 weeks. If the patient has contact or spontaneous pain, it is recommended to consult the doctor immediately and perform root canal treatment; 2. Pulp exposure caused by cavity: root canal treatment is needed, followed by the combination of crown restoration and other operations to protect the tooth.