APA
Faus Llácer, Vicente & Hamoud Kharrat, Nirmine & Ruiz Sánchez, Celia & Faus Matoses, Ignacio & Zubizarreta Macho, Álvaro & Faus Matoses, Vicente .The Effect of Taper and Apical Diameter on the Cyclic Fatigue Resistance of Rotary Endodontic Files Using an Experimental Electronic Device.
ISO 690
Faus Llácer, Vicente & Hamoud Kharrat, Nirmine & Ruiz Sánchez, Celia & Faus Matoses, Ignacio & Zubizarreta Macho, Álvaro & Faus Matoses, Vicente. The Effect of Taper and Apical Diameter on the Cyclic Fatigue Resistance of Rotary Endodontic Files Using an Experimental Electronic Device.
https://hdl.handle.net/20.500.12080/23983
Résumé:
The aim of this study was to analyze the effect of the taper and apical diameter of nickel¿
titanium (NiTi) endodontic rotary files on the dynamic cyclic fatigue resistance. A total of 50
unused conventional NiTi wire alloy endodontic rotary instruments were used in this study. All
NiTi endodontic rotary files were submitted to a custom¿made dynamic cyclic fatigue device until
fracture occurred. The time to failure, the number of cycles to failure, the number of pecking
movements, and the length of the fractured file tip were analyzed using the analysis of variance
(ANOVA) test. In addition, the Weibull characteristic strength and Weibull modulus were also
calculated. The paired t¿test revealed statistically significant differences between the time to failure,
number of cycles to failure, and number of cycles of in¿and¿out movement of both the apical diameter
(p ¿ 0.001) and the taper (p ¿ 0.001) of NiTi endodontic rotary files; however, the results did
not show statistically significant differences between the mean length of the fractured files regarding
the apical diameter (p = 0.344) and taper study groups (p = 0.344). Increased apical diameter
and taper of NiTi endodontic rotary files decreased their dynamic resistance to cyclic fatigue.