Journal of Endodontics
Published Online: August 20, 2014
Abstract
Introduction
Different
single-file systems are available for endodontic treatment; however,
comparative studies are scarce. Thus, the present study evaluated
bacterial reduction promoted by 2 single-file systems: Wave One
(Dentsply Maillefer, Ballaigues, Switzerland) and One Shape (Micromega,
Besancon, France).
Methods
Forty-five distobuccal root canals of upper molars sterilized with ethylene oxide were infected with
Enterococcus faecalis
for 21 days, and then root canal initial bacterial sample was collected
with paper cones and plated on M-enterococcus agar. The specimens were
randomly divided into 3 groups according to instrumentation (
n = 15):
Wave One, One Shape, and the crown-down manual technique (control
group). The other 6 specimens without contamination were control
asepsis. After instrumentation, samples were collected with the use of
scraping and paper cones. The bacterial reduction was calculated, and
then intragroup analysis was performed using the paired
t test and intergroup analysis using analysis of variance (both at 5% significance).
Results
All techniques significantly reduced the number of bacteria in the root canal (
P < .05), with no significant difference between them (
P > .05). The aseptic control group did not show any bacterial growth.
Conclusions
It
can be concluded that the single-file systems Wave One and One Shape
significantly reduce the bacterial number in the root canal and that
there is no significant difference in their bacterial reduction
abilities.
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