THE EFFICIENCY OF CLEANING THE SYSTEM OF CORNER CHANNELS WITH DIFFERENT PROTOCOLS OF IRIGATION

The main reason for the failure of endodontic treatment and its most common pathology, apical periodontitis, are microorganisms combined into a biofilm. Qualitatively performed chemo-mechanical treatment of root canals is the key factor affecting the prognosis of endodontic disease. The application of the protocol with the final activation of the irrigant provides an opportunity to effectively clean the walls of the root canal before sealing. The aim of the study – to check the quality of chemo-mechanical treatment of the walls of the root canal according to the data of scanning electron microscopy (SEM ) when working with different irrigation protocols. Materials and Methods. The research of the comparative character of the quality of chemo-mechanical treatment of the walls of the root canal with the final activation of irrigation solutions in three groups was carried out: 1) using the passive ultrasonic activation of the solution; 2) using the activation of the solution with a gutta-percha pin; 3) with the activation of the solution with the XP -Endo Finisher tool. For this purpose 36 models of teeth ex vivo were used, 12 for each group. The samples were studied using Mira 3 Tescan raster electron microscope. To obtain a high-quality image without distortion, the surface of the samples was covered with a thin layer of gold by a spray coating of 50 to 100 Å. The evaluation of the quality results of the chemo-mechanical treatment was carried out according to the classification of the SEM photographs by Mahmoud Torabinejad and Abbasali Khademi. The obtained data is subjected to statistical analysis using the method of statistical verification of hypotheses, based on comparison with the distribution by Student. Results and Discussion. As a result of this study, the quality of chemo-mechanical treatment with final activation of irrigant in 36 samples was analyzed. According to the evaluation of 386 SEM photographs, the data on the quality of root canal cleaning are derived from three different irrigation protocols – with ultimate passive ultrasonic activation of the irid (PU I), activation of the XP -Endo Finisher tool and the gutta-percha pin (GSH ). The evaluation was carried out on a 3-point scale, where 1 point is the best quality of cleaning, 3 points – the lowest. In spite of the successes of modern microbiology, the root canal microflora is not well understood. Among various drugs with apical periodontitis, 478 species of microorganisms are currently isolated and more than half of them remain unknown. Conclusions. Under the conditions of this experiment, the best results of cleaning the walls of the root canal were achieved by using the XP -Endo Finisher chemomechanical processing protocol for final activation of the solutions. In the apical section, satisfactory results are obtained, both when activating the solutions with the XP -endo Finisher tool, and with passive ultrasonic activation