I. A. Gatilo
Stavropol State Medical University
Russian Federation

Irina А. Gatilo – Сand. Sci. (Med.), Associate Professor, Head of the G.A. Guzovsky Department of Hygiene 

 310 Mira Str., Stavropol 35501 

S. V. Sirak
Stavropol State Medical University
Russian Federation

Sergei V. Sirak – Dr. Sci. (Med.), Professor, Head of the Department of Dentistry, Department of Hygiene 

 310 Mira Str., Stavropol 355017 

V. N. Lenev
Stavropol State Medical University
Russian Federation

Vadim N. Lenev – Сand. Sci. (Med.), Associate Professor, Associate Professor of the Department of Dentistry 

 310 Mira Str., Stavropol 355017 

A. V. Arutyunov
Kuban State Medical University
Russian Federation

Armenak V. Arutyunov – Dr. Sci. (Med.), Associate Professor, Head of the Department of General Practice Dentistry 

 4 Mitrofana Sedina Str., Krasnodar 350063 

N. Bykova
Kuban State Medical University
Russian Federation

Natalia I. Bykova – Сand. Sci. (Med.), Associate Professor, Associate Professor of the Department of Dentistry at the Institute of Continuing Education 

 4 Mitrofana Sedina Str., Krasnodar 350063 

I. I. Kartashevsky
Kuban State Medical University
Russian Federation

Igor I. Kartashevsky – Laboratory Assistant of the Department of General Practice Dentistry 

 4 Mitrofana Sedina Str., Krasnodar 350063 

D. Y. Polyakova
Kuban State Medical University
Russian Federation

Diana Y. Polyakova – Laboratory Assistant of the Department of General Practice Dentistry 

 4 Mitrofana Sedina Str., Krasnodar 350063