Abstract
Introduction
This study examined the effect of different root canal irrigant agitation protocols
in the penetration of an endodontic irrigant into dentinal tubules.
Methods
Fifty-six human single-rooted teeth were shaped with nickel-titanium instruments,
and a final rinse of 5% sodium hypochlorite labeled with 0.2% alizarin red was performed.
Specimens were assigned to 7 groups (N = 8) and submitted to the following rinse activation protocols: no agitation (control
group), K-File or gutta-percha agitation, or different sonic (EndoActivator [Advanced
Endodontics, Santa Barbara, CA] and Plastic Endo, Lincolnshire, IL) and ultrasonic
(Satelec [Acteongroup, Merignac, France] and EMS, Nyon, Switzerland) agitations. Specimens
were sectioned at 1, 3, and 5 mm from the apex in 1-mm-thick slabs, ground, and prepared
for fluorescence microscopy at 100× with a wavelength of 450 milliseconds. Irrigant
penetration into dentinal tubules was analyzed by using Kruskal-Wallis analysis of
variance followed by post-hoc comparisons.
Results
Groups were ranked in the following order: control = K-file = gutta-percha < EndoActivator
= Plastic Endo < Satelec = EMS. At 1 mm from the apex, the highest score was found
for the EMS group compared with the control, K-file, gutta-percha, EndoActivator,
and Plastic Endo groups, whereas no difference was found with the Satelec group.
Conclusion
The results support the use of an ultrasonic agitation to increase the effectiveness
of the final rinse procedure in the apical third of the canal walls.
Key Words
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Article info
Publication history
Published online: December 07, 2009
Identification
Copyright
© 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
