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Effectiveness of different activated irrigation techniques on debris and smear layer removal from curved root canals: a SEM evaluation
Author(s) -
Haupt Franziska,
Meinel Michael,
Gunawardana Asanka,
Hülsmann Michael
Publication year - 2020
Publication title -
australian endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.703
H-Index - 34
eISSN - 1747-4477
pISSN - 1329-1947
DOI - 10.1111/aej.12342
Subject(s) - smear layer , dentistry , debris , root canal , materials science , molar , magnification , orthodontics , medicine , computer science , geology , oceanography , computer vision
Abstract This study evaluates the effectiveness of different activated irrigation techniques on removal of debris and smear layer from curved root canals. Ninety mandibular molars with a root canal curvature between 20 and 40 degrees were assigned to 4 groups ( n = 20): syringe irrigation ( SI ), passive ultrasonic activation ( PUI ), sonic activation with EDDY ( ED ) or EndoActivator ( EA ) and a control group. Mesiobuccal root canals were prepared to size 40, 0.04 and irrigated with Na OC l (3%) according to the respective technique. Roots were split longitudinally and subjected to scanning electron microscopic analysis. Presence of debris and smear layer was evaluated using 5‐grade scoring systems with 200× and 1000× magnification, respectively. Data were analysed with nonparametric analysis for ordinal longitudinal data (α = 5%). Activation of the irrigant significantly improved smear layer removal ( P < 0.05). Regarding debris, only activation with EA and ED was significantly more effective than SI ( P < 0.05). No activation technique was able to eliminate debris and smear layer completely from curved root canals.