TY - JOUR AU - Phuvoravan, Chalermkwan AU - Yamyindee, Pokklaw AU - Chaichanawanich, Ruethaichanok PY - 2019/06/27 Y2 - 2024/03/29 TI - Cyclic Fatigue Resistance of Hyflex® CM after Immersion in Different Root Canal Irrigants JF - Khon Kaen University Dental Journal JA - Khon Kaen Dent J VL - 22 IS - 1 SE - Research Articles DO - UR - https://he01.tci-thaijo.org/index.php/KDJ/article/view/198595 SP - 26-33 AB - <p>The aim of this study was to compare cyclic fatigue resistance of Hyflex® CM nickel titanium rotary instruments no. 25 after immersion in root canal irrigants. A total of 40 new Hyflex® CM files were randomly assigned to 4 groups (n=10). Group 1 was a control group with non-contact to solution and Group 2-4 were submitted in 2.5% sodium hypochlorite (NaOCl), 17% ethylene<br>diaminetetraacetic acid (EDTA), and 2% chorhexidine gluconate (CHX) respectively, at 37°C for 5 minutes. Then, all instruments were tested for cyclic fatigue resistance in the stainless steel artificial canal with a 60° angle of curvature and 5-mm radius of curvature. Files were rotated at the constant speed of 500 rpm with 2.5 N/cm torque. Numbers of rotation before fracture (NRF)<br>were recorded. Mean NRF of group 1 revealed the highest value, followed by group 4, group 3 and group 2, respectively. Statistic analysis revealed the resistance to cyclic fatigue of Hyflex® CM significantly reduced when immersed in all 3 root canal irrigants when compared with control group (p &lt; 0.05).</p> ER -