1. Efficacy of sodium hypochlorite, ethylenediaminetetraacetic acid, citric acid and phosphoric acid in calcium hydroxide removal from the root canal: a microscopic cleanliness evaluation.
- Author
-
da Silva JM, Silveira A, Santos E, Prado L, and Pessoa OF
- Subjects
- Citric Acid chemistry, Dental Pulp Cavity ultrastructure, Dentin drug effects, Dentin ultrastructure, Edetic Acid chemistry, Humans, Materials Testing, Microscopy, Electron, Scanning, Phosphoric Acids chemistry, Root Canal Irrigants chemistry, Root Canal Preparation instrumentation, Root Canal Preparation methods, Sodium Hypochlorite chemistry, Solvents chemistry, Therapeutic Irrigation, Time Factors, Tooth Apex drug effects, Tooth Apex ultrastructure, Calcium Hydroxide chemistry, Citric Acid therapeutic use, Dental Pulp Cavity drug effects, Edetic Acid therapeutic use, Phosphoric Acids therapeutic use, Root Canal Irrigants therapeutic use, Sodium Hypochlorite therapeutic use, Solvents therapeutic use
- 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.)
- Published
- 2011
- Full Text
- View/download PDF