Cone-beam computed tomography assessment of root canal transportation using WaveOne Gold and Neoniti single-file systems

INTRODUCTION: The aim of this study was to compare canal transportation of two single-file systems, WaveOne Gold and Neoniti, using cone-beam computed tomography (CBCT). METHODOLOGY: A total of 40 mesiobuccal canals of maxillary first molars with curvatures of 15°–30° were chosen and randomly divided into two experimental groups (n = 20). In both groups, glide path was established using ProGlider. In group 1, canals were shaped with WaveOne Gold and in group 2 with Neoniti A1, respectively. According to manufacturer's instructions, canal preparation was made. Canals were scanned before and after instrumentation using CBCT scanner to evaluate root canal transportation at 3, 5, and 7 mm from the apex. Data were statistically analyzed, and significance level was set at P < 0.05. RESULTS: Mesiodistal and buccolingual transportation showed a statistically significant difference at 3 mm (P = 0.009) and 7 mm (P = 0.002), respectively, when instrumented with Neoniti than WaveOne Gold. CONCLUSION: WaveOne Gold single reciprocation file respected original canal anatomy better than Neoniti single continuous file