Shaping ability of BlueShaper, TruNatomy, DC Taper and HyFlex EDM in long oval canals: An ex vivo study

Aim This study evaluated and compared the shaping ability of four rotary instrument systems in long–oval root canals using microcomputed tomographic (micro‐CT) evaluation. Currently, there is no data available on the canal shaping abilities of BlueShaper and DC Taper instruments. Methodology Sixty‐four single‐rooted mandibular premolars were matched based on similar root canal morphologic features as determined by (micro‐CT) and randomly assigned to 1 of 4 experimental groups (n = 16) according to the instrument system used: BlueShaper, TruNatomy, DC Taper and HyFlex EDM One File. Changes in the root canal surface and volume, remaining dentine thickness, and number of prepared areas were assessed. Results No significant differences were found amongst the four instrument systems for the parameters evaluated (p > .05). There was a significant reduction in the number of unprepared areas and the remaining dentine thickness after each increase in size of the instruments tested (p