Simple jQuery Dropdowns
Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/1003
Title: Tensile properties of general purpose stainless steel wire formed for orthodontic use.
Authors: Pornkiat Churnjitapirom
พรเกียรติ ชื่นจิตอภิรมย์
Surachai Dechkunakorn
สุรชัย เดชคุณากร
Niwat Anuwongnukroh
นิวัต อนุวงศ์นุเคราะห์
Mahidol University. Faculty of Dentistry. Research Office
Mahidol University. Faculty of Dentistry. Department of Orthodontics
Pornkiat Churnjitapirom
พรเกียรติ ชื่นจิตอภิรมย์
Keywords: Archwires;Elastic modulus;Elongation;Orthodontic;Stainless steel;Tensile properties;Open Access article;วิทยาสารทันตแพทยศาสตร์มหิดล;Mahidol Dental Journal
Issue Date: Sep-2015
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.
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.]
URI: http://repository.li.mahidol.ac.th/dspace/handle/123456789/1003
ISSN: 0125-5614 (printed)
Appears in Collections:DT-Article

Files in This Item:
File Description SizeFormat 
dt-ar-pornkiat-2015.pdf716.76 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.