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

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); 1...

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Bibliographic Details
Published in:Oral surgery, oral medicine, oral pathology, oral radiology and endodontics oral medicine, oral pathology, oral radiology and endodontics, 2011-12, Vol.112 (6), p.820-824
Main Authors: da Silva, Juliana Melo, MD, Silveira, Amanda, Santos, Elizandra, Prado, Laiìs, Pessoa, Oscar F., DDS
Format: Article
Language:English
Subjects:
Biological and medical sciences
Calcium hydroxide
Calcium Hydroxide - chemistry
Canals
Citric acid
Citric Acid - chemistry
Citric Acid - therapeutic use
Dental Pulp Cavity - drug effects
Dental Pulp Cavity - ultrastructure
Dental roots
Dentin - drug effects
Dentin - ultrastructure
Dentistry
Edetic Acid - chemistry
Edetic Acid - therapeutic use
Humans
Irrigation
Materials Testing
Medical sciences
Microscopy, Electron, Scanning
Molars
Otorhinolaryngology. Stomatology
phosphoric acid
Phosphoric Acids - chemistry
Phosphoric Acids - therapeutic use
Root Canal Irrigants - chemistry
Root Canal Irrigants - therapeutic use
Root Canal Preparation - instrumentation
Root Canal Preparation - methods
root canals
Sodium hypochlorite
Sodium Hypochlorite - chemistry
Sodium Hypochlorite - therapeutic use
Solvents - chemistry
Solvents - therapeutic use
Statistical analysis
Surgery
Teeth
Therapeutic Irrigation
Time Factors
Tooth Apex - drug effects
Tooth Apex - ultrastructure
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Summary: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.
ISSN:1079-2104
1528-395X
DOI:10.1016/j.tripleo.2011.08.001