Medical College of Wisconsin
CTSICores SearchResearch InformaticsREDCap

Structure, composition, and mechanical properties of Australian orthodontic wires. Angle Orthod 2009 Jan;79(1):97-101



Pubmed ID




Scopus ID

2-s2.0-58849103921 (requires institutional sign-in at Scopus site)   18 Citations


OBJECTIVE: To investigate the surface morphology, structure, elemental composition, and key mechanical properties of various sizes and tempers of Australian wires.

MATERIALS AND METHODS: Three types of Australian wire were used: 0.016'' regular, 0.018'' regular+, and 0.018'' special+ (A.J. Wilcock, Whittlesea, Victoria, Australia). Each type of wire was subjected to scanning electron microscopy (SEM) analysis, x-ray energy dispersive spectroscopy (EDS) investigation, Vickers hardness testing, and tensile testing. The modulus of elasticity and ultimate tensile strength were determined. Hardness, modulus, and strength data were analyzed with one-way analysis of variance (ANOVA) and Tukey testing at the .05 level of significance.

RESULTS: All three types of Australian wire were found to possess considerably rough surfaces with striations, irregularities, and excessive porosity. All three wire types had high levels of carbon and a similar hardness, which ranged within 600 VHN (Vickers hardness number), and a similar modulus of elasticity (173 to 177 GPa). The 0.018'' special+ had a significantly lower tensile strength (1632 MPa) than the 0.016'' regular and the 0.018'' regular+ wire (2100 MPa).

CONCLUSIONS: Australian wires did not show variation implied by the size or temper of the wires.

Author List

Pelsue BM, Zinelis S, Bradley TG, Berzins DW, Eliades T, Eliades G


David Berzins BS,PhD Graduate Program Director for Dental Biomaterials in the General Dental Sciences/Dental Biomaterials department at Marquette University

MESH terms used to index this publication - Major topics in bold

Dental Alloys
Dental Stress Analysis
Elastic Modulus
Electron Probe Microanalysis
Materials Testing
Microscopy, Electron, Scanning
Orthodontic Appliance Design
Orthodontic Wires
Stainless Steel
Surface Properties
Tensile Strength