TY JOUR TI CLINICAL AND X-RAY FEATURES OF PERIODONTIC TISSUES IN PATIENTS WITH GINGIVAL RECESSION KW gum recession KW gum biotype classification KW etiology KW diagnostic KW surgical methods of treatment KW diagnosis of gum recession KW ultrasound diagnostic method JO Actual problems in dentistry AU Farkhshatova, R.R. AU Usmanova, I.N. AU Gerasimova, L.P. PY 2020 IS 16 PB TIRAZH Publishing House