K. E. Frolova
Penza State University
Russian Federation

Kristina Evgenievna Frolova -  Senior lecturer of the Department of Dentistry.

L. A. Zyulkina
Penza State University
Russian Federation

Larisa Alekseevna Zyulkina - Doctor of medical sciences, associate professor, head of the Department of Dentistry.

A. V. Yurkevich
Far Eastern State Medical University of the Ministry of Health of Russia
Russian Federation

Alexander Vladimirovich Yurkevich - Doctor of Medical Sciences, Associate Professor, Corresponding Member of the Russian Academy of Natural Sciences, Dean of the Faculty of Dentistry, Head of the Department of Orthopedic Dentistry of the Far Eastern State Medical University of the Ministry of Health of Russia.

A. V. Efremova
Penza State University
Russian Federation

Anastasia Vladimirovna Efremova - Candidate of medical sciences, associate professor.