Abstract
Introduction
The purpose of this study is to compare extrusion of irrigants delivered with a 27-G
needle or the EndoVac system (Discus Dental, Culver City, CA) during instrumentation
and final irrigation of teeth.
Methods
Matched paired single canal teeth were divided into four sample groups and controls.
The experimental groups were needle irrigation International Standards Organization
(ISO) size #40 (N40) and #60 (N60) and EndoVac ISO size #40 (E40) and #60 (E60). Teeth
were secured and embedded in 0.2% agarose gel (ph = 7.3-7.4) containing 1 mL 0.1%
m-cresol purple, which changes color at a pH of 9.0. Teeth received NaOCl and EDTA
irrigation with the 27-G slot needle or the EndoVac system. The amount of irrigation
was controlled for each sample. Standardized digital photographs were taken 20 minutes
after the first irrigant was used. Photographs were analyzed by using Adobe Photoshop
7 (Adobe, San Jose, CA) to determine the amount of extrusion expressed as percent
of total pixels.
Results
Data from sample groups show the following: N40 with 50% extrusion (6/12), E40 with
8.33% extrusion (1/12), N60 with 58.33% (7/12), and E60 with 8.33% (1/12). The overall
extrusion frequency, regardless of apical preparation size, was 54.17% (13/24) for
needle and 8.33% (2/24) for EndoVac. Analysis of N40 and E40 revealed p < 0.03. Analysis
of N60 and E60 revealed p < 0.01. Comparison of needle irrigation versus EndoVac showed a significant p value of 0.0007.
Conclusions
This study showed significantly less extrusion risk using the EndoVac system compared
with needle irrigation.
Key Words
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Article info
Publication history
Published online: December 25, 2009
Identification
Copyright
© 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
