Pelvic penetration may be caused by untreated dental caries, caries untreated rot to the pulp, resulting in pulp penetration, the clinical manifestations can be manifested in the presence of residual roots or crowns, the patient may have symptoms such as occlusal pain, or there may be a fistula buccal side. It is recommended that the patient go to the hospital to take X-rays to determine the pulp penetration of the tooth, generally the tooth has no preservation value, it is recommended that the patient in the absence of inflammation will be extracted, and 2-3 months after extraction can go to the Department of Prosthodontics, under the advice of the doctor to carry out the appropriate restorative treatment. Patients can choose the appropriate treatment according to their own requirements, such as implant treatment, fixed bridge restoration, removable denture and other treatment methods.