Prof. Byoung Eun Yang,orthognathic surgery,Maxillary,Mandibular,lefort1,BSSRO,FACEGIDE,R2GATE,Digital orthognathics,cone-beam computed tomography,craniofacial,orthognathic,virtual surgery,2jaw,Division of oral and Maxillofacial surgery,wafer,saw-guide,face-plate,customized,osteotomy,lefort1,bssro,Publication