Impact of recycling on the mechanical properties of nickel-titanium alloy wires and the efficacy of their reuse after cold sterilization.

Yadav, A ; Jayaprakash, PK ; et al.

In: Journal of orthodontic science, Jg. 9 (2020-08-18), S. 10

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Objective: This study aimed to assess the feasibility of reusing nickel-titanium (NiTi) alloy wires after 6 weeks of intraoral use by evaluating the changes in the load-deflection properties and surface characterization of these alloy wires after cold sterilization by immersion in 2% of acidic glutaraldehyde for 10 h.

Material and Methods: Twenty wires each in three groups of G1-as-received wires (ARW), G2-unsterilized used wires, and G3-sterilized used wires (SUW) were tested by the three-point bending test and scanning electron microscopy (SEM). The data were subjected to statistics, one-way analysis of variance, and Bonferroni posthoc test for comparison.

Results: Recycling of NiTi wires produced statistically insignificant changes in both the loading and unloading properties of the wires. The forces needed to twist the used wires, that is, G2-(UUW) and G3-(SUW) were lower than G1-(ARW), suggesting lowering of the stiffness of the wires. Superelasticity is well-maintained by G2-(UUW) and G3-(SUW) although there is an insignificant lowering of the forces exerted by them during loading and unloading. SEM demonstrated no increase in the pitting of surfaces in both G2-(UUW) and G3-(SUW); multiple areas were seen to be more smoothened over G2-(UUW) and G3-(SUW) NiTi wires surfaces.

Conclusion: The findings of this study support the reuse of NiTi wires after 6 weeks of use in oral conditions followed by cold sterilization by immersion in 2% acidic glutaraldehyde for 10 h.

Competing Interests: There are no conflicts of interest.

Titel:	Impact of recycling on the mechanical properties of nickel-titanium alloy wires and the efficacy of their reuse after cold sterilization.
Autor/in / Beteiligte Person:	Yadav, A ; Jayaprakash, PK ; Singh, R ; Dawer, M ; Modi, P ; Sehdev, B ; Ganji, KK
Link:	Full Text Finder (Volltext)
Zeitschrift:	Journal of orthodontic science, Jg. 9 (2020-08-18), S. 10
Veröffentlichung:	Mumbai : Medknow Publications and Media Pvt. Ltd., [2012]-, 2020
Medientyp:	academicJournal
ISSN:	2278-1897 (print)
DOI:	10.4103/jos.JOS_45_19
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article Language: English [J Orthod Sci] 2020 Aug 18; Vol. 9, pp. 10. <i>Date of Electronic Publication: </i>2020 Aug 18 (<i>Print Publication: </i>2020). References: Am J Orthod. 1979 May;75(5):569-75. (PMID: 286558) ; J Biomed Mater Res A. 2003 Dec 15;67(4):1123-30. (PMID: 14624497) ; Angle Orthod. 2007 Nov;77(6):991-8. (PMID: 18004922) ; Am J Orthod Dentofacial Orthop. 1989 Aug;96(2):100-9. (PMID: 2667330) ; Am J Orthod Dentofacial Orthop. 1988 Mar;93(3):232-6. (PMID: 3422779) ; Am J Orthod. 1982 Jul;82(1):45-9. (PMID: 6961776) ; Am J Orthod Dentofacial Orthop. 1988 Aug;94(2):117-22. (PMID: 3135743) ; J Oral Rehabil. 1983 Mar;10(2):121-8. (PMID: 6573461) ; Eur J Orthod. 1995 Oct;17(5):395-402. (PMID: 8529752) ; Am J Orthod Dentofacial Orthop. 1986 Jul;90(1):1-10. (PMID: 3460342) ; Angle Orthod. 1981 Oct;51(4):319-24. (PMID: 6947705) ; Am J Orthod Dentofacial Orthop. 1991 Nov;100(5):428-35. (PMID: 1951195) ; Am J Orthod. 1980 Feb;77(2):121-32. (PMID: 6928342) ; J Mater Sci Mater Med. 1999 May;10(5):275-81. (PMID: 15348144) ; J Dent Res Dent Clin Dent Prospects. 2014 Spring;8(2):71-6. (PMID: 25093049) ; Eur J Orthod. 1991 Oct;13(5):386-91. (PMID: 1748186) Contributed Indexing: Keywords: Bending test; cold sterilization; nickel-titanium alloy wires; recycling; superelasticity Entry Date(s): Date Created: 20201223 Latest Revision: 20201223 Update Code: 20240513 PubMed Central ID: PMC7749455

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