Abstract | INTRODUCTION: 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.
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Authors | Ligeng Wu, Ying Mu, Xiuli Deng, Shasha Zhang, Dongyan Zhou |
Journal | Journal of endodontics
(J Endod)
Vol. 38
Issue 3
Pg. 381-4
(Mar 2012)
ISSN: 1878-3554 [Electronic] United States |
PMID | 22341079
(Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2012 American Association of Endodontists. Published by Elsevier Inc. All rights reserved. |
Chemical References |
- MTAD (intracanal irrigant)
- Polysorbates
- Root Canal Irrigants
- Smear Clear
- Citric Acid
- Edetic Acid
- Sodium Hypochlorite
- Doxycycline
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Topics |
- Citric Acid
(pharmacology)
- Dental Pulp Cavity
(drug effects, ultrastructure)
- Dentin
(drug effects, ultrastructure)
- Double-Blind Method
- Doxycycline
(pharmacology)
- Edetic Acid
(pharmacology)
- Humans
- Materials Testing
- Microscopy, Electron, Scanning
- Polysorbates
(pharmacology)
- Root Canal Irrigants
(pharmacology)
- Root Canal Preparation
(instrumentation)
- Smear Layer
- Sodium Hypochlorite
(pharmacology)
- Tooth Apex
(drug effects, ultrastructure)
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