Abstract
ABSTRACT Objective: This study analyzed the influence of the irrigating solutions ultrasonic activation on the obturator cement penetration into lateral root canals. Methods: Fifty maxillary molars (palatine root) were randomly assigned to 5 experimental groups (Group 1 (EDTA 17% + manual agitation for 5 minutes), Group 2 (EDTA 17% + ultrasonic activation for 15 seconds), Group 3 (NaOCl 1% + Ultrasonic activation for 15 seconds), Group 4 (EDTA 17% + ultrasonic activation for 15 seconds and NaOCl 1% + ultrasonic activation for 15 seconds) and Group 5 (negative control). The lateral root canals were made in the apical and middle third. The obturation occurred in a single session. The radiographic and microscopic analyzes were performed to evaluate the sealant cement penetration degree. Data were analyzed by the Mann-Whitney and Wilcoxon tests. Results: Apical and middle third radiographic analysis showed that Groups 2 and 4 presented better penetration of the sealant cement. In the microscopic analysis, Group 4 presented superior results in relation to the other groups in both thirds. In the apical third, radiographic and microscopic analyzes showed significant differences in the comparisons between Group 4 and Groups 5 (p = 0.019) and 3 (p = 0.023) and between Group 5 and Groups 2 (p = 0.012), 3 (P = 0.038) and 4 (p = 0.019), respectively. Conclusion: It was concluded that the ultrasonic activation of the NaOCl 1% + EDTA 17% irrigation solution provides greater penetration of the endodontic cement in lateral root canals.
Highlights
It was concluded that the ultrasonic activation of the NaOCl 1% + EDTA 17% irrigation solution provides greater penetration of the endodontic cement in lateral root canals
The smear layer produced during instrumentation modifies the dentin permeability and interferes with the seal of the obturator material [1,2]
Passive Ultrasonic Irrigation (PUI) is based on the use of an ultrasound-activated instrument in the root canal filled with irrigant allowing the solution transport to the apical region
Summary
The smear layer produced during instrumentation modifies the dentin permeability and interferes with the seal of the obturator material [1,2]. The use of auxiliary chemical substances in the final toillet allows the increase of permeability and facilitates the intratubular endodontic cements penetration, which promotes a micromechanical retention of the filling to the dentinal wall [3]. Compounds used in irrigation have been chemically modified and mechanical devices seek to improve the penetration and effectiveness of irrigation [4]. Ultrasound is used as an auxiliary tool to clean the root canals through the activation of irrigation solutions to maximize its effect [6]. Passive Ultrasonic Irrigation (PUI) is based on the use of an ultrasound-activated instrument in the root canal filled with irrigant allowing the solution transport to the apical region. Less debris and smear layer are observed in this region [7,8]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call