Publication: Tensile properties of general purpose stainless steel wire formed for orthodontic use.
Accepted Date
2015-09-01
Issued Date
2015-09
Resource Type
Language
eng
ISSN
0125-5614 (printed)
Rights
Mahidol University
Rights Holder(s)
Mahidol University
Bibliographic Citation
Churnjitapirom P, Dechkunakorn S, Anuwongnukroh N. Tensile properties of general purpose stainless steel wire formed for orthodontic use. M Dent J 2015; 35: 203-7.
Suggested Citation
Pornkiat Churnjitapirom, พรเกียรติ ชื่นจิตอภิรมย์, Surachai Dechkunakorn, สุรชัย เดชคุณากร, Niwat Anuwongnukroh, นิวัต อนุวงศ์นุเคราะห์ Tensile properties of general purpose stainless steel wire formed for orthodontic use.. Churnjitapirom P, Dechkunakorn S, Anuwongnukroh N. Tensile properties of general purpose stainless steel wire formed for orthodontic use. M Dent J 2015; 35: 203-7.. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/1003
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Title
Tensile properties of general purpose stainless steel wire formed for orthodontic use.
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Abstract
Objective: The purpose of this study was to determine the tensile properties of type 304 general purpose round stainless steel wires (sizes 0.016", 0.018", and 0.020") before and after being formed to archwires, and to explore the applicability of type 304 general purpose round stainless steel archwires for orthodontic use. Materials and methods: Samples were divided into 2 groups: Group I – Type 304 general purpose stainless steel wires without forming and Group II – Type 304 general purpose stainless steel wires which were formed into archwires using a universal testing machine equipped with a forming device. For both sample groups, 12 wires for each of the 3 sizes: 0.016", 0.018", and 0.020" were subjected to tensile test. All specimens were tested using a universal testing machine equipped with an extensometer at gauge length 12.5 mm. The data of tensile strength, 0.2% proof stress, elongation, and elastic modulus were statistically analyzed using One-way ANOVA and Tukey’s multiple comparison test at 95% confidence interval. Results: Both as-received and after forming, the highest values of the tensile strength, 0.2% proof stress, and elastic modulus were 0.016" followed by 0.020" and 0.018", while the highest values of the elongation was 0.018" followed by 0.020" and 0.016". The 0.2% proof stress of the type 304 general purpose round stainless steel wires significantly increased after forming into archwires (p<0.05), while no significant changes in tensile strength, elongation, and elastic modulus were observed after forming into archwires (p>0.05). Conclusion: The proof stress of type 304 general purpose round stainless steel wires increased after forming into archwires. However, tensile strength, elastic modulus, and elongation were found to be unchanged. [Based on the evaluated tensile properties, tensile strength, proof stress, and elastic modulus of general purpose round stainless steel archwires in this study can be acceptable to use in orthodontic treatment, while elongation should be improved by the annealing heat treatment.]