Objective
This study was designed to quantitatively evaluate the amount of dentin debris extruded
from the apical foramen by comparing the conventional sequence of the ProTaper Universal
nickel-titanium (NiTi) files with the single-file ProTaper F2 technique.
Study design
Thirty mesial roots of lower molars were selected, and the use of different instrumentation
techniques resulted in 3 groups (n = 10 each). In G1, a crown-down hand-file technique
was used, and in G2 conventional ProTaper Universal technique was used. In G3, ProTaper
F2 file was used in a reciprocating motion. The apical finish preparation was equivalent
to ISO size 25. An apparatus was used to evaluate the apically extruded debris. Statistical
analysis was performed using 1-way analysis of variance and Tukey multiple comparisons.
Results
No significant difference was found in the amount of the debris extruded between the
conventional sequence of the ProTaper Universal NiTi files and the single-file ProTaper
F2 technique (P > .05). In contrast, the hand instrumentation group extruded significantly more debris
than both NiTi groups (P < .05).
Conclusions
The present results yielded favorable input for the F2 single-file technique in terms
of apically extruded debris, inasmuch as it is the most simple and cost-effective
instrumentation approach.
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Article info
Publication history
Accepted:
April 16,
2010
Received in revised form:
April 5,
2010
Received:
November 16,
2009
Identification
Copyright
© 2010 Mosby, Inc. Published by Elsevier Inc. All rights reserved.
