Histopathological examination of the specimen showed it to be a huge infected dental cyst due to continuous trauma from occlusion resulting from anterior deep bite. Maxillofacial surgeon Dr. S. M. Balaji successfully removed the entire cystic lesion along with the lining in toto. Followed by defective region of the upper jaw was reconstructed using costochondral rib graft. Following surgery the wound healed well and the patient was happy to be cured of his ailment. After complete bone formation, fixed dental replacement of the missing teeth will be done using dental implants.