Role of Zr and thermomechanical treatment on phase transformation and functional properties of NiTi-based shape memory alloys

Shahmir, Hamed; Kiani, Fatemeh; Baradari, Sadjad; Resnina, Natalia; Bikbaev, Rashid

doi:10.1016/j.jmrt.2023.08.100

Cited by 7 publications

(1 citation statement)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the RE files exhibited the presence of zirconium (Zr). Previous studies have indicated that NiTi surface treatments involving Zr can result in smoother surfaces and improved resistance to metal fatigue [45,46]. The presence of Al and Zr in RE files may also explain why their cyclic fatigue resistance remained unaffected by NaOCl [47].…”

Section: Discussionmentioning

confidence: 98%

Comprehensive Characterization of Blue Wire NiTi File Failure: A Comparative Analysis of Cyclic Fatigue and Torsional Resistance Properties

Barakat,

Almohareb,

Algahtani

et al. 2024

Coatings

View full text Add to dashboard Cite

This study compared the fatigue resistance and elemental composition of two blue heat-treated nickel–titanium (NiTi) files used in root canal preparation as follows: Tia Tornado Blue (TTB) and Race Evo (RE) file systems. For cyclic fatigue testing, the two systems were tested where each file was rotated inside an artificial metal canal submerged in either sodium hypochlorite or saline solution until fracture. Time to fracture was recorded. For torsional fatigue testing, the file tip was secured while the file was allowed to rotate at a fixed rate until fracture. Torque at failure was recorded. The two experiments were performed at simulated body temperature and the length of fractured segments was measured. Statistical analysis was carried out with a significance level (p-value) set at 5%. The mean cycles to fracture for RE were superior to that of TTB irrespective of the solution used (p < 0.05). TTB’s cyclic fatigue resistance decreased in NaOCl (p < 0.0001). RE demonstrated lower torque at failure (p = 0.002). All files were fractured at comparable lengths (p = 0.218). Although RE is considered more resistant to cyclic fatigue, it showed inferior torsional resistance compared with TTB. The NaOCl negatively affected the TTB’s cyclic fatigue resistance.

show abstract

Section: Discussionmentioning

confidence: 98%