Former Head of Prosthetics Department, Military Capital Integrated Hospital Former Director, Implant Department, Armed Forces Capital Integrated Hospital Former Director , Implant Dentistry Jei-dong, Rimplant Dental Clinic Outpatient Professor, Department of Prosthetics, Dankook University Dental Hospital Lifetime member of the Korean Dental Prosthodontic Society Full member of the American Implant Society Full member of the Korean Dental Occlusal Society Full member of the Korean Aesthetic Dental Society Full member of the Korean Oral and Maxillofacial Implant Society Regular member