Oral Surgeon, Center of Maxillofacial Surgery and Dentistry, Kyiv Regional
Clinical Hospital, Kyiv, Ukraine
valentyn.demidov@ukr.net
b Vasyl A. Rybak
PhD, Oral Surgeon; Head, Center of Maxillofacial Surgery and Dentistry,
Kyiv Regional Clinical Hospital, Kyiv, Ukraine (position at moment of
material collection)
rybak.jaws@gmail.com