We compared the mechanical properties of 2Shape mini TS2 (Micro-Mega, Besançon, France) obtained from 1.0 diameter nickel-titanium (NiTi) wires and 2Shape TS2 from 1.2 diameter nickel-titanium (NiTi) wires differently thermally treated at room and body temperature. We used 120 NiTi TS2 1.0 and TS2 1.2 files made from controlled memory (CM) wire and T-wire (n = 10). Cyclic fatigue resistance was tested by recording the number of cycles to fracture (NCF) at room and body temperatures using a customized testing device. Maximum torque and angle of rotation at failure were recorded, according to ISO 3630-1. Data were analyzed by a two-way ANOVA (p < 0.05). The CM-wire files had significantly higher NCFs at both temperatures, independent of wire dimensions. Testing at body temperature negatively affected cyclic fatigue of all files. The 1.0-mm diameter T-wire instruments showed higher NCF than the 1.2-mm diameter, whereas no significant differences emerged between the two CM wires at either temperature. The maximum torque was not significantly different across files. The TS2 CM-wire files showed significantly higher angular rotation to fracture than T-wire files. The TS2 CM-wire prototypes showed higher cyclic fatigue resistance than T-wire prototypes, regardless of wire size, exhibiting suitable torsional properties. Torsional behavior appears to not be affected by NiTi wire size.

Influence of NiTi wire diameter on cyclic and torsional fatigue resistance of different heat-treated endodontic instruments / Pedullà, E; Canova, Fs; La Rosa, Grm; Naaman, A; Diemer, F; Generali, L; Nehme, W. - In: MATERIALS. - ISSN 1996-1944. - 15:(2022), pp. 1-9. [10.3390/ma15196568]

Influence of NiTi wire diameter on cyclic and torsional fatigue resistance of different heat-treated endodontic instruments

Generali L;
2022-01-01

Abstract

We compared the mechanical properties of 2Shape mini TS2 (Micro-Mega, Besançon, France) obtained from 1.0 diameter nickel-titanium (NiTi) wires and 2Shape TS2 from 1.2 diameter nickel-titanium (NiTi) wires differently thermally treated at room and body temperature. We used 120 NiTi TS2 1.0 and TS2 1.2 files made from controlled memory (CM) wire and T-wire (n = 10). Cyclic fatigue resistance was tested by recording the number of cycles to fracture (NCF) at room and body temperatures using a customized testing device. Maximum torque and angle of rotation at failure were recorded, according to ISO 3630-1. Data were analyzed by a two-way ANOVA (p < 0.05). The CM-wire files had significantly higher NCFs at both temperatures, independent of wire dimensions. Testing at body temperature negatively affected cyclic fatigue of all files. The 1.0-mm diameter T-wire instruments showed higher NCF than the 1.2-mm diameter, whereas no significant differences emerged between the two CM wires at either temperature. The maximum torque was not significantly different across files. The TS2 CM-wire files showed significantly higher angular rotation to fracture than T-wire files. The TS2 CM-wire prototypes showed higher cyclic fatigue resistance than T-wire prototypes, regardless of wire size, exhibiting suitable torsional properties. Torsional behavior appears to not be affected by NiTi wire size.
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Influence of NiTi wire diameter on cyclic and torsional fatigue resistance of different heat-treated endodontic instruments / Pedullà, E; Canova, Fs; La Rosa, Grm; Naaman, A; Diemer, F; Generali, L; Nehme, W. - In: MATERIALS. - ISSN 1996-1944. - 15:(2022), pp. 1-9. [10.3390/ma15196568]
Pedullà, E; Canova, Fs; La Rosa, Grm; Naaman, A; Diemer, F; Generali, L; Nehme, W
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1289825
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