TY CONF TI EVALUATION OF THE QUALITY OF LIFE IN PATIENTS WITH ORAL LICHEN PLANUS KW oral lichen planus KW quality of life KW chitosan JO International Congress "dentistry of The great Urals" November 29-December 1, 2017 Youth scientific school on fundamental dentistry AU Zhovtyak, P.B. AU Griroriev, S.S. PY 2023 PB TIRAZH Publishing House