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Effect of Final Irrigation Regimen on Sealer Penetration in Curved Root Canals

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Authors
Moon, Young-Mi; Shon, Won-Jun; Baek, Seung-Ho; Bae, Kwang-Shik; Kum, Kee-Yeon; Lee, WooCheol
Issue Date
2010-04
Publisher
Elsevier
Citation
J Endod 2010;36:732–736
Keywords
Confocal laser scanning microscopyEDTAfinal irrigationNaOClsealer penetration
Abstract
Introduction: The purpose of this study was to evaluate the effect of different final irrigation regimens on the sealer penetration into dentinal tubules of curved root canals. Methods: The mesiobuccal canals from 45 extracted maxillary and mandibular molars were instrumented with sodium hypochlorite (NaOCl) irrigation. The samples were divided into 3 groups according to the final irrigation used: group N (control), 3.5% NaOCl; group E, 17% ethylenediaminetetraacetic acid (EDTA); and group EN, 17% EDTA followed by 3.5% NaOCl. All teeth were obturated with gutta-percha and AH Plus sealer labeled with fluorescent dye. Transverse sections at 2 mm (apical) and 5 mm (coronal) from root apex were examined by using confocal laser scanning microscopy. Then, total percentage and maximum depth of sealer penetration were measured. Results: The apical sections in each group showed significantly lower percentage and maximum depth of sealer penetration than the coronal sections (P < .05). In apical levels, group E and EN resulted in a higher percentage of sealer penetration than the control group (P < .05), but there was no significant difference of maximum depth between group E and the control group (P > .05). Conclusions: In curved canal, final rinse with NaOCl after the use of EDTA had no additional effect on sealer penetration. Complete debridement with a 1-minute application of EDTA remains a challenge in the apical area of curved canals.
ISSN
0099-2399
Language
English
URI
http://hdl.handle.net/10371/74161
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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