TY JOUR TI CLINICAL, LABORATORY AND ECONOMIC JUSTIFICATION OF ORTHOPEDIC TREATMENT OF PATIENTS WITH A NEW DEVICE FOR RESTORING THE MISSING CLINICAL CROWN OF PREMOLARS KW destruction of the crown part of premolars KW stump pin insert KW ceramic-metal crown KW economic efficiency KW orthopedic treatment JO Actual problems in dentistry AU Matrosov, V.V. PY 2020 IS 16 PB TIRAZH Publishing House