The correct name of orthodontic wire is orthodontic arch wire. Its function is to use the deformation of its material itself to generate a continuous force of a certain magnitude, and finally achieve the purpose of tooth correction.
Since the arch wire is formed by stretching, the orthodontic arch wire usually needs heat etching to eliminate residual stress, increase strength and stabilize size.
In addition, friction is an important factor affecting orthodontic treatment, but the friction of the arch wire varies greatly due to the properties of the material and the production process. Therefore, it is necessary to frequently add force and replace the arch wire during clinical use. When aligning more seriously misaligned teeth, it is often necessary to use an arch wire with a smaller diameter or bend it into a curve.