Infl uence of motion pattern on apical transportation and centering ability of WaveOne single-fi le technique in curved root canals

Abstract

Background: The aim of this study was to evaluate apical transportation and centering ability of
single-fi le instruments, WaveOne primary, with full rotation versus reciprocation movement using
cone-beam computed tomography (CBCT) analysis in curved mesiobuccal (MB) root canal of
human mandibular molars.
Materials and Methods: Thirty MB canals of mandibular molars were randomly divided into
two groups according to the instrument motion (n = 15): Group 1, reciprocation/WaveOne
primary; Group 2, continuous rotation/WaveOne primary. After preparation, the amount of apical
transportation and centering ability were assessed by evaluating pre- and post-instrumentation
CBCT scans in three section (1, 3, and 5 mm from apical foramen). Statistical analysis of the data
was performed using Mann-Whitney U-test and Friedman test (α = 0.05).
Results: There was no statistically signifi cant difference between two experimental groups in
terms of apical transportation and centering ratio at 1, 3, and 5 mm from apical foramen (P > 0.05).
Conclusion: Apical transportation and centering ability of WaveOne primary reciprocating
instrument did not signifi cantly differ between two motion patterns.

Key Words: Apical, cone-beam computed tomography, full, reciprocating, rotation, single,
transportation