Shaping ability of TruNatomy, i-File X, and ProTaper Universal in mesial canals of 3D-printed mandibular molars: a micro-CT study - Wenyuan Zhou; Chao Liu; Ying Tang; Lu Wang; Yinfeng Qiu; Juan Fan; Lin Zhu; Zhigang Feng; Yongchun Gu (BMC Oral Health, 2026)