Impact of metallurgical features on the cyclic and torsional properties of five reciprocating instruments manufactured with blue thermal treatment - Teves Cordova, Abel Victor Isidro; Alcalde, Murilo Priori; Vivan, Rodrigo Ricci; Zevallos Quiroz, Cesar Andre; Ponce Guzmán, Hubert Abel; Calefi, Pedro Henrique Souza; Pinto, Bruna de Oliveira; Correa, Diego Rafael Nespeque; Grandini, Carlos Roberto; Duarte, Marco Antonio Hungaro (Microscopy Research and Technique, 2025)