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2015 ; 10
(4
): 263-7
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Comparing the Coronal Flaring Efficacy of Five Different Instruments Using
Cone-Beam Computed Tomography
#MMPMID26525955
Homayoon A
; Hamidi MR
; Haddadi A
; Madani ZS
; Moudi E
; Bijani A
Iran Endod J
2015[Fal]; 10
(4
): 263-7
PMID26525955
show ga
INTRODUCTION: Fearless removal of tooth structure during canal preparation and
shaping has negative effects on the prognosis of treatment. On the other hand,
sufficient pre-enlargement facilitates exact measurement of the apical size. The
present in vitro study aimed to compare the efficacy of Gates-Glidden drills, K3,
ProTaper, FlexMaster and RaCe instruments in dentin removal during coronal
flaring using cone-beam computed tomography (CBCT). METHODS AND MATERIALS: A
total of 40 mandibular molars were selected and the coronal areas of their
mesiobuccal and mesiolingual root canals were randomly prepared with either
mentioned instruments. Pre- and post-instrumentation CBCT images were taken and
the thickness of canal walls was measured in 1.5- and 3-mm distances from the
furcation area. Data were analyzed using the one-way ANOVA. Tukey's post hoc
tests were used for two-by-two comparisons. RESULTS: At 1.5-mm distance, there
was no significant difference between different instruments. However, at 3-mm
distances, Gates-Glidden drills removed significantly more dentin compared to
FlexMaster files (mean=0.18 mm) (P<0.02); however, two-by-two comparisons did not
reveal any significant differences between the other groups. CONCLUSION: All
tested instruments can be effectively used in clinical settings for coronal
pre-enlargement.