Abstract
Introduction
The purpose of this study was to evaluate the effectiveness of different irrigation
systems on removing calcium hydroxide (Ca[OH]2) from the root canal by using a scanning electron microscope.
Methods
Forty extracted single-rooted teeth were divided randomly into 4 groups. Canal instrumentation
was done, and the teeth were filled with Ca(OH)2 paste. One week later, 4 techniques were used for Ca(OH)2 removal. In the first group, the canals were cleaned with a master apical file. The
second, third, and fourth groups were irrigated using the EndoVac (Discus Dental,
Culver City, CA), EndoActivator (Dentsply Tulsa Dental Specialties, Tulsa, OK), and
ProUltra (Dentsply Tulsa, Tulsa, OK) systems, respectively. All the groups were irrigated
with 3 mL (18%) EDTA and 3 mL (1%) NaOCl for 1 minute. The canal walls were viewed,
and the remaining amount of Ca(OH)2 was evaluated using a scanning electron microscope. A scoring system was used to
assess the amount of residue Ca(OH)2 on each third of the canal. The obtained data for comparisons between the conventional
irrigation needle and each device were statistically analyzed using the Mann-Whitney
U test.
Results
To compare the 4 devices, the results were statistically analyzed using the analysis
of variance test.
Conclusions
None of the investigated techniques removed the Ca(OH)2 dressing completely. However, the EndoActivator System showed better results in removing
Ca(OH)2 in each third of the root canals in comparison with the other techniques.
Key Words
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Article info
Publication history
Published online: November 04, 2014
Identification
Copyright
© 2015 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
