Impact of Varying Amplitudes of Upward and Downward Motion on the Torque/Force Generation, Canal-Centering Ability, and Cyclic Fatigue Resistance of Nickel–Titanium Reciprocating Instrument. - Hirano, Keiko; Kimura, Shunsuke; Maki, Keiichiro; Omori, Satoshi; Ebihara, Arata; Okiji, Takashi (Applied Sciences (2076-3417), 2025)