%0 Journal Article %T ANALYSIS OF THE CAUSES OF FAILURE OF ENDODONTIC TREATMENT AND THE CAUSES OF TOOTH EXTRACTION WITH A DIAGNOSIS OF CHRONIC APICAL PERIODONTITIS %A Kuratov, I.A. %A Nagaeva, M.O. %A Korneeva, M.V. %A Surkov, M.A. %K apical periodontitis, a survey of dentists, irrigation methods, tooth extraction, endodontic treatment %J Actual problems in dentistry %D 2019 %N 15 %P 4 %I TIRAZH Publishing House