Ameloblastoma is a benign odontogenic tumor with variable clinical characteristics and histological patterns.Though it is benign, it is regarded as locally malignant lesion for its local invasiveness and persistent growth.Resection of the jaw has been the principle treatment of ameloblastoma as the chance of recurrence is extremely high if treated by simple enucleation and curettage.But the resection of jaw is associated with numbers of complications such as loss of jaw bone support, deformity, dysfunction and psychological distress even after reconstruction.To overcome these problems we considered a new concept of conservative surgical approach named "Dreging Method".The purpose of this method is to eliminate the tumor tissues completely and to accelerate new bone formation for eventual achievement of normal contour of jaw.