Dean of the Faculty of Dentistry, University of Puthisastra, Phnom Penh BDS. (Seema Dental College, India) M.Sc.D Orthodontics (University of the East, Philippines) PGDHHM (Symbiosis Center for Healthcare, India) Ph.D. (Thammasat university, Bangkok, Thailand) FAMS- National Academy of Medical Sciences- India FICD (Fellow of the International College of Dentists), USA FPFA- (Fellow of the Pierre Fauchard Academy), USA FDS RCS England (UK) FDS RCPS Glasgow (UK) MFDS RCS Edinburgh (UK) MDTF RCS Edinburgh (UK)