Back to Search Start Over

Disinfection and Shaping of Vertucci Class II Root Canals after Preparation with Two Instrument Systems and Supplementary Ultrasonic Activation of Sodium Hypochlorite.

Authors :
Loyola-Fonseca SC
Campello AF
Rodrigues RCV
Alves FRF
Brasil SC
Vilela CLS
Gonçalves LS
Provenzano JC
Siqueira JF Jr
Rôças IN
Source :
Journal of endodontics [J Endod] 2023 Sep; Vol. 49 (9), pp. 1183-1190. Date of Electronic Publication: 2023 Jul 06.
Publication Year :
2023

Abstract

Introduction: This study compared disinfection and shaping after root canal preparation with either XP-endo Shaper or TruNatomy instrument systems, supplemented by ultrasonic activation of sodium hypochlorite (NaOCl) with either stainless-steel (SS) or nickel-titanium (NiTi) inserts.<br />Methods: Mesial roots from mandibular molars with Vertucci class II configuration were divided into 2 groups (n = 24) based on anatomically paired micro-computed tomography (micro-CT) analyses. Pre and postpreparation micro-CT scans were obtained to evaluate the shaping performance. The canals were contaminated with a mixed bacterial culture for 30 days and then subjected to preparation with either XP-endo Shaper or TruNatomy instruments using NaOCl irrigation. Supplementary ultrasonic activation of NaOCl was conducted using either an SS (TruNatomy group) or NiTi (XP-endo Shaper group) insert. Bacteriological samples were taken from the canals before preparation (S1), after preparation (S2), and after the supplementary approach (S3). Bacterial reduction was evaluated using a quantitative real-time polymerase chain reaction.<br />Results: Preparation with both instrument systems significantly reduced bacterial counts (P < .01). After preparation, 36% (TruNatomy) and 35% (XP-endo Shaper) were negative for bacteria. These values increased to 59% and 65% after ultrasonic activation with the SS and NiTi inserts, respectively. The quantitative data in S2 showed that XP-endo Shaper promoted a significantly higher bacterial reduction than TruNatomy (P < .05). No significant intragroup differences were observed after ultrasonic activation (P > .05), probably because the SS insert promoted a significantly higher S2-to-S3 reduction than the NiTi insert (P < .01). Micro-CT analysis revealed no significant differences in the unprepared areas between the groups (P > .05).<br />Conclusions: The XP-endo Shaper caused a significantly higher bacterial reduction than TruNatomy in Vertucci class II canals. Better antibacterial results after ultrasonic activation were observed for the SS ultrasonic inserts than for the NiTi inserts.<br /> (Copyright © 2023 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.)

Details

Language :
English
ISSN :
1878-3554
Volume :
49
Issue :
9
Database :
MEDLINE
Journal :
Journal of endodontics
Publication Type :
Academic Journal
Accession number :
37419243
Full Text :
https://doi.org/10.1016/j.joen.2023.06.017