Abstract
Introduction
This study aimed to compare the filling ability of carrier-based thermoplasticized
gutta-percha in flat-oval canals prepared using either rotary ProTaper files (Dentsply
Maillefer, Ballaigues, Switzerland) or the Self-Adjusting File system (SAF) (ReDent-Nova,
Ra'anana, Israel).
Methods
Thirteen pairs of mandibular incisors were selected from a random collection. The
teeth in each pair had single root canals with a flat-oval cross-section and similar
sizes and dimensions. Teeth from each pair were randomly assigned to 1 of 2 experimental
groups. One group was instrumented using the ProTaper NiTi system, whereas the SAF
system was used in the other. Root filling was performed with Thermafil obturators
(Dentsply Tulsa Dental Products, Tulsa, OK), and teeth were sectioned at 6, 5, 4,
and 3 mm from the apex; the cut surface was subjected to morphometric measurement
to establish the percent gutta-percha–filled area (PGFA) for each section. The Wilcoxon
matched-pairs signed rank test was used to assess the effect of the 2 preparation
methods on the PGFA.
Results
The median PGFA in the ProTaper group was 77.5%, whereas the median PGFA was 90.5%
in the SAF group (P < .05). In the SAF-instrumented group, 17.8% of the specimens had a PGFA ≥95% compared
with only 5.8% of the ProTaper-instrumented specimens (P < .05).
Conclusions
Instrumentation of the flat-oval canals with the SAF system led to a significantly
higher PGFA compared with ProTaper instrumentation with syringe and needle irrigation.
Key Words
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Article info
Publication history
Published online: April 19, 2012
Identification
Copyright
© 2012 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
