Document Detail

Comparison of the effect of four decalcifying agents combined with 60°c 3% sodium hypochlorite on smear layer removal.
MedLine Citation:
PMID:  22341079     Owner:  NLM     Status:  In-Data-Review    
INTRODUCTION: The objective of this study was to compare the efficacy on smear layer removal of 4 decalcifying agents: 17% ethylenediaminetetraacetic acid (EDTA), 20% citric acid, BioPure MTAD, and SmearClear.
METHODS: Forty-five single-rooted human teeth were used and prepared up to ProTaper F3. After each instrumentation, 1 mL of 3% NaOCl at 60°C was irrigated for 1 minute. All the samples were randomly divided into 5 groups according to the final irrigants: 17% EDTA, 20% citric acid, BioPure MTAD, SmearClear, and 3% NaOCl (control). The smear layer removal of all groups at the apical, middle, and coronal thirds was observed under the thermal field emission scanning electron microscope.
RESULTS: The EDTA group was significantly more effective than the SmearClear and MTAD groups (P < .05). The efficacy of all three thirds in the EDTA, MTAD, and SmearClear groups can be arranged as coronal, middle, and apical thirds (P < .05) from excellent to poor. However, in the citric acid group, the coronal two thirds were significantly better than the apical third (P < .05), and there was no statistical significance between the coronal and middle thirds (P > .05).
CONCLUSIONS: The 4 decalcifying agents could effectively, but not completely, remove the smear layer, especially in the apical third. The efficacy of 17% EDTA was better than that of MTAD and SmearClear.
Ligeng Wu; Ying Mu; Xiuli Deng; Shasha Zhang; Dongyan Zhou
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Publication Detail:
Type:  Journal Article     Date:  2011-12-22
Journal Detail:
Title:  Journal of endodontics     Volume:  38     ISSN:  1878-3554     ISO Abbreviation:  J Endod     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-02-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7511484     Medline TA:  J Endod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  381-4     Citation Subset:  D    
Copyright Information:
Copyright © 2012 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
Department of Endodontics, School of Stomatology, Tianjin Medical University, Tianjin, China.
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