Education / Qualifications

• 1988: DDS, Dental School University of Athens
• 1996: PhD, Dental School, University of Athens

Academic and professional positions held

• 1998-1999, 2000-2001: Adjunct Lecturer, Department of Oral Pathology, Dental School, University of Athens
• 2002-2006: Lecturer, Department of Basic Sciences, Dental School, University of Athens
• 2006-2008: Lecturer, Department of Oral Pathology, Dental School, University of Athens
• 2008-2018: Assistant Professor, Department of Oral Pathology, Dental School, University of Athens
• 2018-2021: Associate Professor, Department of Oral Pathology, Dental School, University of Athens
• 2021-present: Associate Professor, Department of Oral Pathology & Hospital Dentistry, Dental School, University of Athens

Academic and professional responsibilities

• Teaching of Oral Histology and Embryology (seminars and laboratory exercises), Graduate Program, 2nd semester, Dental School, University of Athens
• Teaching of Stomatology (seminars and laboratory exercises), Graduate Program, 7th-8th semesters, Dental School, University of Athens
• Teaching of Stomatology (seminars and clinical practice), Graduate Program, 9th-10th semesters, Dental School, University of Athens
• Teaching in various courses (Basic Oral Pathology I and II, Principles of Pathology, Principles of Oral Surgery, Diagnostic Oral Histopathology, Advanced Histopathology of Oral Diseases)
• Postgraduate Program, Dental School, University of Athens
• Supervisor in 12 MS theses (completed) and two PhD thesis (1 completed), member in 7 three-members advisory committees of PhD theses (6 completed, 1 active), Postgraduate Program, Dental School, University of Athens
• Elected member of the General Assembly (2006-7 and 2011-12), ad hoc member of the committees for the Library (2005-6), Curriculum (2008-9), Continuing Education (2016-present), Ethics (2016-present), and selection of postgraduate students in the Department of Oral Pathology, Dental School, University of Athens
• Member of the Organizing Committees of 14 Hellenic and one International scientific meeting (11th Biennial Congress of the European Association of Oral Medicine, 2012).
• Member of the Board of Executives of the Stomatology Society of Greece (2007-present) and the Hellenic Society of Oral Medicine and Pathology (2001-2012)

Research Grants and Contracts

• Immunohistochemical study of calcifying odontogenic cyst (Gorlin’s cyst) and calcifying epithelial odontogenic tumor (Pindborg’s tumor), Financed by the Special Account for Research Grants of the University of Athens (completed)
• Histologic and immunohistochemical study of dental pulp in diabetic rats, Financed by the Special Account for Research Grants of the University of Athens (completed)

Awards and Honours

• 2nd Award for oral presentation on a freely chosen subject. Kontogiannis T, Krithinakis S, Tosios K, Kerezoudis N, Sklavounou A. A periapical lesion is not always a sequel of pulp necrosis. A retrospective study of 1,900 biopsies. 1st International Congress of Endodontics, Athens, December 2013.
• Oral Presentation, 2nd Position. Chaniotis A, Prodromidis G, Mitrou GG, Chatzistamou I, Tosios KI, Sklavounou A. A fluctuant swelling on the upper mucolabial fold. Roots Summit 2012, Iguazu Falls, Brazil, October 18-20, 2012.
• Wladimir Adlivankine research prize: Meliou E, Kerezoudis NP, Tosios K, Lafkas D, Kiaris H. Immunohistochemical expression of Notch signaling in the lining epithelium of periapical cysts. 14th Biennial Congress of the European Society of Endodontology, Edinburgh, Scotland, September 24-26, 2009.
• Poster Prize: Gisakis I, Tosios K, Zabaras D, Bouboulis S, Spanos A, Petsinis V, Kalyvas D. Guided bone regeneration for residual ridge augmentation: clinical, histologic and histomorphometric study in 46 patients. International Symposium of Osteology, Monaco, May 10-12, 2007.
• Robert Frank 2nd Award: Papavasileiou D, Tosios K, Vlachodimitropoulos D, Goutas I. HER-2/neu in oral squamous cell carcinomas: Immunochistochemical and CISH analysis. International Association of Dental Research Pan European Federation 2006, Dublin, September 13-16, 2006.

Memberships

• Hellenic Society of Oral Medicine and Pathology (founding member)
• Hellenic Society of Odontostomatological Research
• Stomatology Society of Greece

Research Theses - Books

• Immunohistochemical study of basement membrane components in hyperplastic and neoplastic lesions of the oral epithelium. PhD Thesis, Athens 1996
• Expression and regulation of MDM2 protein in ameloblastoma, Athens 2016
• Basic laboratory and techniques in oral histology and histopathology. K. Tosios, E. Crhrysomali, St. Papanicolaou. Benchbook, Athens 1998, 2001.
• Selected publications in scientific journals
• Tosios KI, Kalogirou EM, Sklavounou A. Drug-associated hyperpigmentation of the oral mucosa: report of four cases. Oral Surg Oral Med Oral Pathol Oral Radiol 2018, 125(3):e54-e66. doi: 10.1016/j.oooo.2017.10.006
• Siamantas I, Kalogirou E-M, Tosios KI, Sklavounou A. Spongiotic gingival hyperplasia synchronously involving multiple sites: Case report and review of the literature.  Head Neck Pathol 2018, 12(4):517-521. doi: 10.1007/s12105-018-0903-9
• Katsoulas Ν, Tosios Κ, Sklavounou-Andrikopoulou Α. Lichenoid lesions of the upper lip: A retrospective study of 24 cases. Med Oral Patol Oral Cir Bucal 2018, 23(3):e302-e307. doi: 10.4317/medoral.22303.
• Michelogiannakis D, Vastardis H, Melakopoulos I, Papathanasopoulou C, Tosios KI. The challenge of managing patients with generalized short root anomaly: A case report. Quintessence Int. 2018, 49(8): 673-9.
• Tamiolakis P, Theofilou VI, Tosios KI, Sklavounou-Andrikopoulou A. Oral verruciform xanthoma: Report of 13 new cases and review of the literature. Med Oral Patol Oral Cir Bucal 2018, 23(4):e429-e435. doi: 10.4317/medoral.22342.
• Chatzipetros Ε, Christopoulos P, Donta C, Tosios K, Tsiambas E, Tsiourvas D, Kalogirou E-M, Tsiklakis K. Application of nano-hydroxyapatite/chitosan scaffolds on rat calvarial critical-sized defects: A pilot study. Med Oral Patol Oral Cir Bucal 2018, 23(5):e625-32 doi:10.4317/medoral.22455
• Thermos G, Tosios K. Gingival ischemia and petechiae in a patient medicated with PCSK9 inhibitor for hypercholesterolemia. An adverse drug event?
  Clinical Advances in Periodontics 2018, doi: 10.1002/cap.10043.
• Tosios KI, Delli Κ, Makris N. Multiple osteolytic lesions of the jaws in a patient with neurofibromatosis type I. A case report and focused literature review. Oral Surg 2019, 12:126-132. doi: 10.1111/ors.12389.
• Kontogiannis TG, Tosios KI, Kerezoudis NP. Effect of calcium hydroxide as intracanal medicament on the expression of caspase-9 located within the radicular cyst epithelium. Aust End J 2019, doi:10.1111/aej.12325.
• Tamiolakis P, Thermos G, Tosios KI, Sklavounou-Andrikopoulou A. Demographic and Clinical Characteristics of 5294 Jaw Cysts: A Retrospective Study of 38 Years. Head and Neck Pathology https://doi.org/10.1007/s12105-019-01011-7 

Areas of scientific interest

• Basement membrane
• Oral potentially malignant disorders and oral cancer
• Odontogenic cysts and tumors

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