Abstract: This paper reported a case with autotransplantation of a mandibular second molar impacted in mandibular ramus to its normal position. By using digital surgery and minimally invasive tooth extraction, an impacted mandibular second molar was immediately autotransplanted from mandibular ramus to its normal position. After the buccal and distal bone defect was filled by autologous bone, the transplanted tooth was elastically fixed. Postoperative occlusal relationship was good, the immediate mobility was I degree, and the bone defect was repaired. Root canal therapy was completed 6 months later. Clinical and radiographic examination showed the transplanted tooth healed well 1 year later. Transplantation of impacted molar from mandibular ramus to its normal position can be an option for autogenous teeth transplantation.

Key words: Autotransplantation, Impacted second molar, Digital surgery