Certificate of Bjorn Zacrisson Orthodontic Course Certifacate of Implanet Implant Surgery and Prosthodontic Course Fellow of WFO(World Federation of Orthodontists) 대한치과교정학회(Korean Association of Orthodontists) 정회원 미국치과교정학회(American Association of Orthodontists) 정회원 대한설측교정학회(Korean Association of Lingual Orthodontists) 창립회원