In this case report,autotransplantation of lower left third molar for grossly decayed lower left first molar has been described. In this case report, A 19 yr old female patient reported with grossly decayed lower left first molar with poor prognosis hence extraction was advised. The preoperative assessment showed the favored position of the erupted lower left third molar. The CBCT imaging of the third molar helped in the production of a 3D prototype which has reduced the extraoral time of the donor teeth and preservation of its periodontal ligament cells c. After the preparation of neoalveolus with the help of the 3D guide, the donor tooth extracted was placed in the socket, checked for the fit and occlusal discrepancies and sutured back. In this case report, even the other factors such as patient factors, donor factors, and recipient factors were taken into consideration. And postoperative follow-up’s had shown the stability of the transplanted tooth. Conclusion: Thus usage of the technological advancements helps in reducing the duration of the procedure, iatrogenic errors and provides a greater chance for a favorable outcome
