Abstract

Introduction: The canal transportation is defined as as removing the structure of canal
wall on the outer curve in the apical half of the canal due to the fact that the rotary files
being used failed to restore themselves to their original linear shape during canal
shaping. The success of an endodontic treatment is determined majorly by the effective
biomechanical preparation and following the original anatomy of the root canal.
Materials and Methodology: For the study purpose, eighty mesio-buccal root canals
from human permanent mandibular first molars teeth which were extracted for various
periodontal reasons, caries free and non-carious lesion free accompanied by normal
anatomical form and structure were carefully selected. At once, the root canals were
prepared, CBCT series of images were taken for all the teeth. Both mesiodistal and
buccolingual diameters were recorded at 2mm, 3mm and 4 mm from the apex in both
the diagnostic and postoperative CBCT imaging.
Results: The Reciproc (Group I) system revealed the greatest canal transportation with
least centering ability when compared to other file systems that have been studied. The
observable difference in the canal transportation in the 3 groups was reported to be
statistically significant (p<0.001), except while comparing the 4 mm distance from the
root apex, the buccolingual transportation was not statistically significant between the
Reciproc and WaveOne groups (p = 0.591). In, OneShape rotary file system has
recorded the highest centering ability, while the Reciproc displayed the lowest under
certain experimental conditions.