The Dentist Dr. Konstantinos Mantalenakis graduated from the School of Dentistry, University of Athens and received his specialty of Oral and Maxillofacial Surgean from the School of Dentistry, University of Athens. Post-graduate in Maxillofacial surgery in Tufts University, USA. PhD in 1988 at the Dental Department of the University of Athens, Oral Pathology and Surgery Section. Author of the chapter Lasers in Maxillofacial Surgery in the textbook: Modern Oral and Maxillofacial Surgery. Certificate Master Degree from the university of Vienna in Lasers. Member of Hellenic and Foreign Scientific Societies. Has taken part as a guest lecturer and instructor in foreign and Greek congresses. From 1981 he practices the profession of Dentistry with emphasis in Maxillofacial surgery and implantology.