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Revista Facultad de Odontología Universidad de Antioquia
Print version ISSN 0121-246X
Abstract
PORTILLO-MARTINEZ, Maria Alejandra et al. Cyclic fatigue resistance of three reciprocating nickel-titanium instruments with heat treatment at intrachannel temperature. Rev Fac Odontol Univ Antioq [online]. 2023, vol.35, n.1, pp.25-35. Epub Oct 13, 2023. ISSN 0121-246X. https://doi.org/10.17533/udea.rfo.v35n1a2.
Introduction:
the in vitro study compared the dynamic cyclic fatigue resistance of 3 reciprocating NiTi files with heat treatment.
Methods:
we distributed 30 new endodontic files in three groups. The endodontic files selected for this experiment were: AF Blue R3 25/06 (AFB) (Fanta Dental, Shanghai, China), X1 Blue File 25/06 (X1B) (MK Life, Porto Alegre, RS, Brazil), and Reciproc Blue 08/25 (RB) (VDW, Munich, Germany. We measured the time to file fractureand the length of the fractured fragment. ANOVA analysis was used, followed by the Tukey test for multiple comparisons, with a significance level of 5% (P < 0,05).
Results:
the mean time in seconds until the file fractured was 170.7 ±15,1 for AFB files, 110,4 ±26,8 for X1B, and 163,3 ±22,9 for RB files. This difference was statistically significant when comparing X1B to AFB (p: 0,000) and X1B to RB (p: 0,000). However, there are no statistically significant differences between RB and AFB (p:0,739).
Conclussions:
this study found that RB and AFB files exhibit similar resistance to cyclic fatigue.
Keywords : dental instruments; shape memory alloys; flexural strength.