Effect of EDDY and manual dynamic activation techniques on postoperative pain in non-surgical retreatment: a randomized controlled trial

Abstract

Background During non-surgical retreatment process, the products such as dentin debris, root canal fillings, irrigation solutions, microorganisms and remaining pulp tissues can extrude to the apical area and can cause the postoperative pain and flare-up. Thus, the aim of this study was to evaluatethe effect of EDDY and manual dynamic activation (MDA) techniques on postoperative pain (PP) associated with retreatment. Methods Ninety patients scheduled for retreatment were treated at a single visit. Non-vital mandibular premolar teeth diagnosed with asymptomatic apical periodontitis were included in this study. The patients were divided into two groups (n = 45) on the basis of the need for additional irrigation activation procedures (EDDY and MDA). The patients’ post-treatment pain levels were asked to rate the intensity of their pain on a 10-point numerical rating scale (NRS) at the 12th, 24th, 48th, and 72nd h and 7 days.The data were analyzed using the chi-square and Wilcoxon signed-rank test was used for within-group comparisons and Mann Whitney U test was used to compare the groups by time period. Results The difference in postoperative pain intensity between two groups was statistically significant at 12, 24, 48, and 72 h (p < 0.05). There was no significant difference at 7 days. Moreover, no statistically significant difference was found between the two groups in terms of gender and analgesic medication intake (p > 0.05). Pain intensity after the treatment was lesser in the MDA groupthanin the EDDY group at 12, 24, 48, and 72 h. Conclusion This study could lead us to conclude that the two activation systems can be used during endodontic retreatment with no difference at PP 7 days later. However, a comparison of the groups indicated that the EDDY resulted in significantly more PP at 12, 24, 48, and 72 h. Trial registration ClinicalTrials.gov Identifier: NCT04726670.

Endodontic methods for retreatment of periapical lesions: A review

“…In addition, the technical quality of root canal treatment and retreatment depends on several risk factors such as canal curvature and morphology [14] . For this reason, due to the inability to make contact with all the walls of the dentin it is at this point where chemomechanical preparation takes on greater relevance thanks to its ability to remove debris, disinfection of the canal and lubricating effects during the procedure [15] . Hand and rotary instruments are used to remove the previous endodontic filling material, removing it correctly from the root canal walls may be related to the metallurgical properties and recommended movements of the instrument, which help the clinician to reach the hard-to-reach areas, which would allow more disinfection with less dentin wear [16] .…”

Performance of two different electronic apex locators during the removal of calcium silicate-based sealers

“…The first option is non-surgical endodontic retreatment in cases where root canal treatment fails for various reasons, such as residual bacteria and necrotic tissue, coronal leakage, and tooth cracks (1,2). Success in retreatment can be achieved by removing the previously infected root canal filling, chemomechanical reinstrumentation, and obturating the root canals hermetically (3). The chemomechanical instrumentation should be performed within the root canal and should end at the minor apical constriction, which most commonly exists 0.5-1.0 mm short of the radiologic apex (4,5).…”