TY CONF TI FEATURES OF THE STRUCTURE OF THE HYDROXYAPATITE OF TOOTH ENAMEL ACCORDING TO THE RESULTS OF THE METHOD OF IR-SPECTROSCOPY IN PERSONS WITH DIFFERENT SUSCEPTIBILITY TO DENTAL CARIES KW Hydroxyapatite KW dental enamel KW calcium JO International Congress "dentistry of The great Urals" November 29-December 1, 2017 Youth scientific school on fundamental dentistry AU Mikheykina, N.I. AU Elovicova, T.M. PY 2024 PB TIRAZH Publishing House