Effect Of Torsional Preloading Of Heat-Treated Files On The Cyclic Fatigue Resistance In Simulated 90o Root Canal Curvature. Journal of Pharmaceutical Negative Results [Internet]. 2022 Jun. 1 [cited 2026 Jun. 17];:4391-5. Available from: https://www.pnrjournal.com/index.php/home/article/view/9984