TY JOUR TI EFFICIENCY OF COMBINATIONS OF ORAL HYGIENE PRODUCTS IN CHILDREN AT DIFFERENT LEVEL OF ANTHROPOGENIC LOAD KW dental caries KW prevention KW anthropogenic load KW nanohydroxyapatite KW fluoride JO Actual problems in dentistry AU Samatova, R.Z. AU Safina, R.M. AU Ahmetova, G.M. PY 2021 IS 17 PB TIRAZH Publishing House