Canal Transportation and Centering Ability of Root Canals Prepared Using a New Rotary Nickel-Titanium File System: An in Vitro Study

Abstract

Introduction: This study aimed to compare and evaluate the canal-centering ability, and apical transportation of three different NiTi rotary instruments: HyFlex EDM, JIZAI, and WaveOne Gold using cone-beam computed tomography (CBCT).

Objectives: It is crucial to correlate instrument properties with root canal anatomical features, and evaluating canal centering ability and apical transportation will help with the increased chances of success of endodontic treatment.

Methods: Seventy-two extracted human single-rooted mandibular teeth were used in the present study. Pre-instrumentation scans of all teeth were taken, and the samples were randomly divided into three groups with twenty-four samples in each group: Group I – HyFlex EDM, Group II – JIZAI, and Group III – Wave One GOLD. Post-instrumentation scans were performed and the two scans were compared to determine the canal-centering ability, and canal transportation at 1, 3, and 5 mm from the root apex.

Results: Using ANOVA and Tukey’s post hoc analysis, results were as follows: for canal-centering ability, at all levels. JIZAI had the highest canal-centering ability, followed by WaveOne Gold and HyFlex EDM (p < 0.05). For canal transportation, JIZAI caused the least transportation at all levels (p < 0.05).

Conclusions: Within the constraints of the current study, it was discovered that the JIZAI file produced significantly less transportation, stayed centered, and respected the original canal anatomy better than Wave One GOLD and HyFlex EDM. More research is needed to extrapolate these findings to clinical conditions.