Comparison of mechanical and structural properties of nickel-titanium alloy with titanium-molybdenum alloy and titanium-niobium alloy as potential metals for endodontic files

Introduction: The objective of this study was to compare the mechanical and structural properties of the nickel-titanium (Ni-Ti) alloy already used in endodontics with titanium-molybdenum (Ti-Mo) and titanium-niobium (Ti-Nb) alloys to determine if these can be suggested in the manufacture of endodontic files. Methods and Materials: Orthodontic wires made of the different alloys were used. The previously mentioned alloys were characterized by energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and torsion tests. Cyclic fatigue tests were performed on a simulated canal with a curvature of 86° to 375 rpm. The fractured surfaces of the wires were observed by means of scanning electron microscopy (SEM). A Kruskal-Wallis test and U Mann Whitney test were used to determine significant differences in cyclic fatigue between groups. Results: In the mechanical tests, similar values of torsion were found for the three alloys. In XRD, the Ti-Nb showed less structural changes. In the cyclic fatigue test, Ti-Nb was found to be significantly more resistant with respect to Ni-Ti and Ti-Mo. Conclusion: Based on our in vitro study, Ti-Nb is suggested as a possible alloy for the manufacture of rotary files due to its impressive properties.

• Autores: Niño-Barrera, Javier Laureano; Aldana-Ojeda, Laura; Gamboa-Martinez, Luis Fernando; Acosta-Humanez, Manuel; Silva-Castellanos, Christian; Cortés-Rodríguez, Carlos Julio
• Tipo de recurso: Article of journal
• Fecha de publicación: 2021
• Institución: Universidad El Bosque
• Repositorio: Repositorio U. El Bosque
• Idioma: eng
• OAI Identifier: oai:repositorio.unbosque.edu.co:20.500.12495/5771
• Acceso en línea: http://hdl.handle.net/20.500.12495/5771; https://doi.org/10.22037/iej.v16i1.24048
• Palabra clave: Cyclic Fatigue; Nickel-titanium; Rotary Files; Titanium-molybdenum; Titanium-niobium
• Rights: openAccess
• License: Atribución-NoComercial-CompartirIgual 4.0 Internacional