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Results of Orthodontic treatment depend not only on skills of clinician, appropriate diagnosis and treatment planning, but also on material of components used for fixed mechanotherapy. Components of fixed appliance include wires, brackets, Nickel Titanium (NiTi) springs, elastic module, ligature wire etc. A variety of materials with variable physical properties, esthetics and frictional properties are used for manufacturing of orthodontic wires. Therefore, an Orthodontist must know the properties and behaviour of different wires for their appropriate clinical use to achieve satisfactory results during orthodontic therapy. This article reviews the NiTi wire and latest trends of these wires.
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