R. A. Rozov
City Dental Clinic No. 33; Academician I.P. Pavlov First St. Petersburg State Medical University
Russian Federation

Rozov Roman A. - PhD, Associate Professor of Department Prosthodontic Dentistry and Dental Materials  Pavlov First SPSMU, Head of the St. Petersburg State Budgetary Health Care Institution CDC No. 33.

V. N. Trezubov
Academician I.P. Pavlov First St. Petersburg State Medical University
Russian Federation

Trezubov  Vladimir N. - PhD, MD, DSс, Professor, Head of the of Department Prosthodontic  Dentistry and Dental Materials.

SaintPetersburg

A. V. Shalaginova
Academician I.P. Pavlov First St. Petersburg State Medical University
Russian Federation

Shalaginova  Anna V. - graduate student of Department Prosthodontic  Dentistry and Dental Materials.

L. Ya. Kusevickiy
Academician I.P. Pavlov First St. Petersburg State Medical University
Russian Federation

Kusevickiy Leonid Y. - PhD, MD, DSс, Professor of the of Department  Prosthodontic   Dentistry  and Dental Materials.