TY CONF TI EVALUATION OF THE EFFECTIVENESS OF NEW PHARMACOLOGICALLY ACTIVE COMPOSITIONS OF NANOSTRUCTURED hydroxyapatite APPLICATION IN PATIENTS WITH EARLY MANIFESTATIONS OF tooth wear KW tooth wear KW erosion KW attrition KW abrasion KW remineralisation KW hydroxyapatite 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 2024 PB TIRAZH Publishing House