To flat or not to flat?: exploring the impact of flat-side design on rotary instruments using a comprehensive multimethod investigation - Silva, Emmanuel João Nogueira Leal da; Alcalde, Murilo Priori; Martins, Jorge N. R; Vieira, Victor Talarico Leal; Vivan, Rodrigo Ricci; Duarte, Marco Antonio Hungaro; Belladonna, Felipe Gonçalves; Braz-Fernandes, Francisco Manuel; Versiani, Marco Aurélio (International Endodontic Journal, 2023)