What is the purpose of the arch wire in orthodontics?

The arch wire in orthodontics plays a crucial role in the tooth movement process, and its primary function is to establish and maintain the shape of the dental arch. By connecting the brackets on each tooth, the arch wire helps create a complete arch shape which is essential for proper alignment and spacing. When force is applied through the arch wire, it activates the brackets and applies pressure on the teeth, facilitating their movement into the desired positions over time.

While establishing the shape of the dental arch is fundamental, the arch wire also contributes to guiding tooth movement and applying pressure. The other functions, such as holding elastics in place, are secondary roles of the components involved in orthodontic treatment. Ultimately, the arch wire's contribution to shaping the dental arch and working in tandem with the brackets is vital for achieving the desired orthodontic outcomes.