Instrument design may influence bacterial reduction during root canal preparation - Machado, Manoel Eduardo de Lima; Nabeshima, Cleber Keiti; Caballero Flores, Hector Valentin; Elmadjian-Filho, Moyzés; Duarte, Marco Antonio Hungaro; Odinola-Zapata, Ronald; Cai, Silvana (Brazilian Dental Journal, 2017)