Jaber, Sura A, and Zainab M Abdul-Ameer. 2016. “A Comparative Evaluation of the Centering Ability and Canal Transportation of Simulated S-Shaped Canals Instrumented With Different Nickel –Titanium Rotary Systems”. Journal of Baghdad College of Dentistry 28 (1): 48-56. https://doi.org/10.12816/0024709.