TY JOUR TI INVESTIGATION OF CLINICAL EFFICACY OF WHITENING TOOTHPASTE BASED ON SILICON DIOXIDE, CALCIUM PYROPHOSPHATE AND EXTRACTS OF MEDICINAL PLANTS KW teeth whitening KW toothpaste KW oral hygiene KW clinical research in dentistry KW extracts of medicinal plants JO Actual problems in dentistry AU Tokmakova, S.I. AU Bondarenko, O.V. AU Lunitsyna, Y.V. AU Rikhter, A.A. AU Subbotin, E.A. AU Chechun, N.V. PY 2022 IS 18 PB TIRAZH Publishing House