Temporarily or long-term lower lip numbness, pain, discomfort and other symptoms are often caused by dental implants and bone fragments into the inferior alveolar neural canal, and it has to remove the implant ultimately. This paper reported a case that implant extruded bone fragment into the inferior alveolar nerve tube, and the patient was not fell abnormal pain and numbness after surgery. 3 months later, the cone beam computed tomography-checking showed that the bone fragment was absorbed and the implant gained good osseointegration. Implant-suported restoration was finished after 3.5 months, 2-years follow-up, the patient felt good. To reduce the length of the implant appropriatly and the correct operation can greatly reduce this risk.
