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Nickel-Titanium Alloy Wires In Orthodontics, Sirichom Satrawaha, Vachara Phetcharakupt

Chulalongkorn University Dental Journal

Nickel-titanium alloy wires have suitable properties for orthodontic tooth movement because they have the light and continuous force delivery or superelasticity. Some wires have shape memory effect. However, these wires are expensive and have poor formability. Nowadays there are many kinds of nickel-titanium alloy wires for choosing so it is necessary to understand the mechanical properties of each wire. The purpose of this article was to review the mechanical properties of each kind of nickel-titanium alloy wires including their effect on temperature changing providing the basic knowledge of wire selection.