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Efficacy of sodium hypochlorite, ethylenediaminetetraacetic acid, citric acid and phosphoric acid in calcium hydroxide removal from the root canal: a microscopic cleanliness evaluation.

Authors
  • da Silva, Juliana Melo1
  • Silveira, Amanda
  • Santos, Elizandra
  • Prado, Laiìs
  • Pessoa, Oscar F
  • 1 Department of Endodontics, Federal University of Pará, Belém, Brazil. [email protected] , (Brazil)
Type
Published Article
Journal
Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics
Publication Date
Dec 01, 2011
Volume
112
Issue
6
Pages
820–824
Identifiers
DOI: 10.1016/j.tripleo.2011.08.001
PMID: 22099858
Source
Medline
Language
English
License
Unknown

Abstract

Rooted molars were subjected to standardized canal instrumentation to a master apical file (MAF). The samples were dressed with Ca(OH)(2), and after 7 days, teeth were reopened and Ca(OH)(2) medication was removed by 1 of 4 different experimental procedures: 2.5% sodium hypochlorite (NaOCl) (n = 10); 17% EDTA-T (n = 10); 10% citric acid (n = 10); or 37% phosphoric acid (n = 10). This was followed by reinstrumentation with MAF plus 15 mL saline solution. The roots were prepared for scanning electron microscopic analysis of the cervical, middle, and apical thirds. Statistical analysis was performed with the Kruskal-Wallis test. EDTA-T and phosphoric acid gave the best results in the apical third, with significant statistical differences compared with other groups. NaOCl gave the worst results. Irrigation with 17% EDTA-T and 37% phosphoric acid is more effective than sodium hypochlorite and citric acid in the removal of calcium hydroxide from the apical third. Copyright © 2011 Mosby, Inc. All rights reserved.

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