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Evaluation of the root canal shaping ability of two rotary nickel–titanium systems
Author(s) -
AlManei K. K.,
AlHadlaq S. M. S.
Publication year - 2014
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/iej.12243
Subject(s) - root canal , nickel titanium , coronal plane , dentistry , significant difference , molar , orthodontics , dental instruments , materials science , mathematics , medicine , composite material , anatomy , statistics , shape memory alloy
Abstract Aim The aim was to investigate the canal shaping abilities of the twisted file ( TF ) and GT series X file ( GTX ) systems. Methodology Sixty mesial root canals of mandibular molars with curvatures of 15–50° were divided randomly into two groups of 30 canals each. The teeth were sectioned horizontally at 3, 6 and 9 mm from the apex. Root canals were prepared with TF and GTX files, respectively, and the shaping abilities of the systems were evaluated at three levels (coronal, middle and apical) based on the comparison of pre‐ and post‐instrumentation photographs using Auto CAD software. Preparation time was also assessed. Data from the two groups were compared statistically using the Student's t ‐test. Results There was no significant difference between the rotary systems in terms of change in root canal cross‐sectional area, root canal transportation, centring ability or minimum dentine thickness. Remaining dentine thickness at the coronal and middle levels was similar in the TF and GTX groups, but GTX instruments left significantly less dentine than TF instruments on the mesial aspects of root canals at the apical level. Root canal preparation with TF instruments required significantly less time than with GTX instruments. Conclusions The TF and GTX NiTi rotary instruments showed similar shaping abilities, but root canal preparation was more rapid with the TF than with the GTX system.