L. Yu. Orekhova
Pavlov First Saint Petersburg State Medical University; «PAKS» City Periodontal Center
Russian Federation

Liudmila Yu. Orekhova, DMD, PhD, DSc, Professor, Head of the Department of Operative Dentistry and Periodontology

Saint Petersburg 

E. S. Loboda
Pavlov First Saint Petersburg State Medical University; «PAKS» City Periodontal Center
Russian Federation

Ekaterina S. Loboda, DMD, PhD, Associate Professor, Department of Operative Dentistry and Periodontology

Saint Petersburg 

V. G. Atrushkevich
A.I. Yevdokimov Moscow State University of Medicine and Dentistry
Russian Federation

Victoria G. Atrushkevich, DMD, PhD, DSc, Professor, Department of periodontology

Moscow 

E. V. Kosova
Pavlov First Saint Petersburg State Medical University
Russian Federation

Elena V. Kosova, DMD, PhD, Associate Professor, Department of Operative Dentistry and Periodontology

Saint Petersburg 

V. Yu. Vashneva
Pavlov First Saint Petersburg State Medical University
Russian Federation

Veronica Yu. Vashneva, DMD, PhD, Associate Professor, Department of Operative Dentistry and Periodontology

Saint Petersburg 

A. A. Petrov
Pavlov First Saint Petersburg State Medical University
Russian Federation

Alexander A. Petrov, DMD, PhD student, department of Operative Dentistry and Periodontology

Saint Petersburg