Evaluation of the mechanical properties of different nickel–titanium retreatment instruments

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 e...

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Veröffentlicht in:	Australian endodontic journal 2021-08, Vol.47 (2), p.265-272
Hauptverfasser:	Weissheimer, Theodoro, Heck, Luana, Calefi, Pedro Henrique Souza, Alcalde, Murilo Priori, Rosa, Ricardo Abreu, Vivan, Rodrigo Ricci, Duarte, Marco Antonio Hungaro, Só, Marcus Vinícius Reis
Format:	Artikel
Sprache:	eng
Schlagworte:	Body temperature cyclic fatigue Dental equipment Dentistry Dentistry, Oral Surgery & Medicine Endodontics Heat treatments Kruskal-Wallis test Life Sciences & Biomedicine Materials fatigue Mechanical properties Nickel NiTi alloy Scanning electron microscopy Science & Technology Statistical analysis strength to bend Titanium torsion
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Zusammenfassung:	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
ISSN:	1329-1947 1747-4477
DOI:	10.1111/aej.12474