Nabavizadeh, M., Sedigh-Shams, M. and Abdolrasoulnia, S. 2019. Cyclic Fatigue Life of Two Single File Engine-Driven Systems in Simulated Curved Canals. Iranian Endodontic Journal. 13, 1 (Nov. 2019), 61–65. DOI:https://doi.org/10.22037/iej.v1i1.18037.