Abstract
Introduction
Profile GT files have been redesigned and are now marketed as GTX nickel-titanium
rotary files.
Methods
A double-digital radiographic technique was used to compare apical transportation
(AT) and change in working length (CWL) between Profile GT and GTX rotary files. Mesiobuccal
canals of 40 extracted mandibular molars were instrumented by either rotary system.
The central axes of preoperative (15 K) and master apical rotary file (30/.04) were
digitally superimposed. AutoCAD was used to measure AT at 0, 1, and 3 mm from WL.
The distance from the file tip to the set WL indicated any CWL. Analysis of variance
test showed no significant differences between groups in AT.
Results
CWL in GTX (−0.25 ± 0.42) group was significantly greater than in Profile GT group
(0.17 ± 0.30).
Conclusions
The AT results indicate that the newly designed GTX rotary instruments are as effective
as the older Profile GT instruments.
Key Words
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Article info
Publication history
Published online: December 11, 2009
Identification
Copyright
© 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
