Introduction: The aim of this study was to investigate the role of the cross-sectional design surface in improving the cyclic fatigue resistance by comparing two nickel-titanium (NiTi) rotary instruments with the same heat-treatment and grinding procedure. Materials and Methods: A total of 40 new NiTi instruments (20 S-One 25.06 taper and 20 AF Blue S4 25.06 taper) were tested in the present study. Both instruments were rotated at 300 rpm and with a torque setting of 2 Ncm) using an endodontic motor in the same artificial canal (90° angle of curvature and 3 mm radius). A Student's t-test was performed to determinate the differences in terms of time to fracture (TtF) and the length of the fractured portion between the two different instruments. Significance was set at P < 0.05. Results: The differences in terms of TtF for cyclic fatigue resistance between the two files were statistically significant (P < 0.05). In terms of fractured length, not statistically significant differences were found (P > 0.05). Scanning electron microscopy images showed patterns of cyclic fatigue striations. Conclusion: The results of this study confirm and enhance the role of cross-section in increasing the cyclic fatigue resistance of NiTi rotary instruments.

Influence of different cross-section on cyclic fatigue resistance of two nickel-titanium rotary instruments with same heat treatment: An in vitro study / Di Nardo, D.; Gambarini, G.; Seracchiani, M.; Mazzoni, A.; Zanza, A.; Giudice, A.; D'Angelo, M.; Testarelli, L.. - In: SAUDI ENDODONTIC JOURNAL. - ISSN 2320-1495. - 10:3(2020), pp. 221-225. [10.4103/sej.sej_124_19]

Influence of different cross-section on cyclic fatigue resistance of two nickel-titanium rotary instruments with same heat treatment: An in vitro study

Di Nardo D.
Primo
Conceptualization
;
Gambarini G.
Secondo
Validation
;
Seracchiani M.
Methodology
;
Zanza A.;D'Angelo M.;Testarelli L.
Ultimo
Conceptualization
2020

Abstract

Introduction: The aim of this study was to investigate the role of the cross-sectional design surface in improving the cyclic fatigue resistance by comparing two nickel-titanium (NiTi) rotary instruments with the same heat-treatment and grinding procedure. Materials and Methods: A total of 40 new NiTi instruments (20 S-One 25.06 taper and 20 AF Blue S4 25.06 taper) were tested in the present study. Both instruments were rotated at 300 rpm and with a torque setting of 2 Ncm) using an endodontic motor in the same artificial canal (90° angle of curvature and 3 mm radius). A Student's t-test was performed to determinate the differences in terms of time to fracture (TtF) and the length of the fractured portion between the two different instruments. Significance was set at P < 0.05. Results: The differences in terms of TtF for cyclic fatigue resistance between the two files were statistically significant (P < 0.05). In terms of fractured length, not statistically significant differences were found (P > 0.05). Scanning electron microscopy images showed patterns of cyclic fatigue striations. Conclusion: The results of this study confirm and enhance the role of cross-section in increasing the cyclic fatigue resistance of NiTi rotary instruments.
2020
Cross-section; cyclic fatigue; endodontics; heat treatment; nickel-titanium rotary instruments
01 Pubblicazione su rivista::01a Articolo in rivista
Influence of different cross-section on cyclic fatigue resistance of two nickel-titanium rotary instruments with same heat treatment: An in vitro study / Di Nardo, D.; Gambarini, G.; Seracchiani, M.; Mazzoni, A.; Zanza, A.; Giudice, A.; D'Angelo, M.; Testarelli, L.. - In: SAUDI ENDODONTIC JOURNAL. - ISSN 2320-1495. - 10:3(2020), pp. 221-225. [10.4103/sej.sej_124_19]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1442577
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