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Continuing pain after root canal treatment, swelling, the occurrence of fistulous, the severity of periapical changes are the indications for repeated endodontic treatment. Mineral trioxide aggregate (MTA) is a reliable bioactive material proposed for widespread use in endodontics, in particular as an obturation material. The article contains a review of the literature on the use of MTA as an intracanal filling material, a comparison of the clinical effectiveness of the methods and principles of its placement, a description of the results of treatment of apical periodontitis. A technique and clinical cases of MTA use in conjunction with thermocompaction of gutta-percha. A new technique combining materials, which can increase positive outlook during the endodontic retreatment.

Poor quality treatment of periodontal inflammation is the cause of tooth extraction. Most of the teeth treated endodontically in the future are subject to retreatment. The success of conservative treatment of apical periodontitis appreciably depends from compliance with the standards of classical endodontics. This article summarizes three clinical cases of endodontic retreatment of destructive forms of apical periodontitis, where noted positive dynamics