In the process of orthodontics, the teeth are usually fixed with steel wires where the teeth are extracted. These steel wires are called arch wires and are an important part of dental instruments.

The main function of archwire is to move the teeth to the ideal position. By placing the archwire in the dental appliance, a force can be applied and the teeth can be guided to move. This force is determined by the shape and texture of the arch wire, which can transfer the force to the teeth and make them move in the right direction.

The purpose of using multiple steel wires in tooth extraction is to better control and adjust the position of teeth. Because the position of teeth will change after tooth extraction, it is necessary to use steel wire to adjust and fix teeth to ensure that teeth are in the correct position. At the same time, the use of multiple steel wires can also increase the stability and durability of the dental appliance and make the correction effect better.

It should be noted that the use of archwire needs to be decided according to personal situation and doctor's advice. In the process of orthodontics, patients need to check regularly to ensure that the position and strength of arch wire are appropriate and avoid any possible problems.