| Autor: |
Weissheimer, Theodoro, Heck, Luana, Calefi, Pedro Henrique Souza, Alcalde, Murilo Priori, da Rosa, Ricardo Abreu, Vivan, Rodrigo Ricci, Duarte, Marco Antonio Hungaro, Só, Marcus Vinícius Reis |
| Předmět: |
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| Zdroj: |
Australian Endodontic Journal; Aug2021, Vol. 47 Issue 2, p265-272, 8p |
| Abstrakt: |
This study investigated the cyclic fatigue, bending, torsional resistance and angular deflection of Pro‐R 25.08, Logic RT 25.08, MK Retreatment 25.08 (MK RT) and ProTaper Retreatment D2 instruments. Cyclic fatigue test was performed until fracture in a custom stainless‐steel device with water bath equipment to simulate body temperature. Fracture time was recorded. A number of cycles were calculated. Resistance to bending at 45°, torsional resistance and angular deflection were evaluated. The fracture surfaces were examined by scanning electron microscopy. Statistical analysis was performed with one‐way ANOVA and Tukey and Kruskal–Wallis and Dunn tests. Pro‐R and Logic RT presented the highest cyclic fatigue (P < 0.05). D2 had higher strength to bend than Pro‐R and Logic RT (P < 0.05). Logic RT showed the highest torque and angular deflection (P < 0.05), without differences when compared to D2 (P > 0.05). Instrument performances were dependent on their geometrical features and heat treatments. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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