Comparison of Canal Transportation and Remaining Dentin Thickness using Different NiTi Systems with CBCT - An in Vitro Study

Context: Controlled, uniformly tapered radicular preparation is a great challenge in endodontics. This study evaluated the shaping ability of three different instrumentation techniques. Aims: The aim of this study was to compare canal transportation and remaining dentin thickness of hand NiTi K files, ProTaper and WaveOne rotary systems using CBCT. Settings and Design: This study was conducted in the Department of Conservative Dentistry and Endodontics,Kamineni Institute of Dental Sciences,Narketpally in association with the secunderabad dental imaging, Secunderabad. Methods and Material: 30 mesiobuccal roots of maxillary first molars were taken and assigned to 3 experimental groups (n=10). Pre instrumentation and post instrumentation CBCT images of root cross sections at 3, 5, 7 and 9mm from apex to the canal orifice were obtained. Canal transportation and remaining dentin thickness were evaluated using DICOM software. Statistical analysis used: Data was statistically analyzed using SPSS version 19.0 software, One-way analysis of variance and Post hoc comparison for statistical significance. Results: It was observed that ProTaper has shown significantly more canal transportation when compared to hand NiTi K files and WaveOne at all the sections. Hand NiTi K files has shown significantly more dentin thickness compared to ProTaper and WaveOne at all sections. Conclusions: The WaveOne NiTi system has maintained the canal anatomy with less amount of canal transportation when compared with the ProTaper system and Hand NiTi K flex files in the apical third.