Effects of different concentrations of ethylenediamine tetraacetic acid paste on removing root canal smear / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 149-157, 2010.
Article
in Chinese
| WPRIM
| ID: wpr-246635
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the effect of different concentrations of ethylenediamine tetraacetic acid (EDTA) paste on the removing root canal smear layers and the degrees of erosion on the surface of the root canal walls at the different portions of canal.</p><p><b>METHODS</b>Sixty human teeth with single root were instrumented using step-back technique, then were divided into six groups and treated with different concentrations EDTA paste and NaCLO solution. Group A 0.9% saline; group B 5.25% NaC10+5% EDTA; group C 5.25% NaC10+10% EDTA; group D 5.25% NaC10+15% EDTA; group E 5.25% NaC10+17% EDTA; group F 5.25% NaClO+20% EDTA. Then the teeth were split, the root canals with different treatments were examined with scanning electron microscope at the coronal, middle and apical thirds for smear layers removal and the degrees of erosion.</p><p><b>RESULTS</b>The effect of EDTA paste on removing smear layers at the coronal, middle thirds of the root canal increased with the concentrations. 15% EDTA paste could remove the smear layers at the coronal and middle thirds of the root canal, but the effect on apical third was invalid, and no erosion could be found in the root canal wall. 17% and 20% EDTA paste produced the erosion to the root canal wall.</p><p><b>CONCLUSION</b>The concentrations of the EDTA paste can influence the effect of the removing smear layers, and the concentration beyond 17% would produce the erosion to root canal wall.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Ointments
/
Root Canal Irrigants
/
Root Canal Therapy
/
Microscopy, Electron, Scanning
/
Smear Layer
/
Edetic Acid
/
Root Canal Preparation
/
Dental Pulp Cavity
Limits:
Humans
Language:
Chinese
Journal:
West China Journal of Stomatology
Year:
2010
Type:
Article
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