Shaping ability of different NiTi rotary systems during the preparation of printed mandibular molars

Abstract

This study aimed to evaluate the shaping ability of XP- endo Shaper, TruNatomy and EdgeFile X3 during the preparation of resin- printed mandibular molar mesial root canals. Thirty- three resin- based mandibular mesial roots with two canals, obtained from extracted tooth cone- beam computed tomography (CBCT) image and printed on a three- dimensional (3D) printer, were divided into three experimental groups according to the different nickel– titanium (NiTi) systems used for root canal prepa-ration. The specimens were scanned using CBCT imaging before and after root canal preparation. Then images were registered using a dedicated software and changes in the canal area, volume, untouched canal surface and the maximum and mini-mum dentine wall wear were calculated. The XP- endo Shaper instruments showed improved shaping ability with lower untouched root canal surface and better pres-ervation of root canal anatomy during the preparation of resin- printed mandibular mesial root canals compared with TruNatomy and EdgeFile X3 systems.