TY CONF TI DENTAL STATUS OF PATIENTS WITH EARLY MANIFESTATIONS OF TOOTH WEAR KW tooth wear KW dental erosion KW abrasion KW attrition KW conservative dentistry JO International Congress "dentistry of The great Urals" November 29-December 1, 2017 Youth scientific school on fundamental dentistry AU Legkih, A.V. AU Mandra, Y.V. PY 2021 PB TIRAZH Publishing House