Capcha-Duymovich, P.; Percca-Condo, M.; Villar-Zapata, J. C.; Escalante-Otárola , W.; Denegri-Hacking , A.; Córdova-Malca, F.; Coaguila-Llerena, H. Cyclic Fatigue Resistance, Macroscopic, Microscopic, and Elemental Analysis of Three Reciprocating Systems. Iran Endod J 2026, 21, e18.