Torque Spring

The torque spring is typically made from stainless steel or nickel-titanium wire, which allows it to exert consistent pressure while maintaining flexibility.
The spring is often customized to the patient’s dental needs and can be attached to a braces system or integrated into other orthodontic appliances.
The spring is typically placed on the archwire, with one end anchored to a bracket or tooth, and the other end applying pressure to the targeted area (either to rotate or tip a tooth).
Function:

The main function of the torque spring is to torque the teeth—that is, to apply force that moves the tooth roots in a desired direction.
This movement can be forward (positive torque) or backward (negative torque), depending on the treatment needs.
Torque springs help correct tipping of the teeth, ensuring that both the crowns (the visible part of the teeth) and the roots are properly aligned.
How It Works:

The spring exerts gentle, continuous pressure on the teeth, gradually moving them into a more favorable position over time.
Torque springs work by applying rotational force to the tooth roots, which helps to reposition the roots while aligning the crowns in the desired direction.
Types of Forces:

Positive Torque: Moves the roots of the teeth backward. This is useful when the teeth are tipped too far forward (for example, when the upper incisors are flared outward).
Negative Torque: Moves the roots of the teeth forward. This is used when teeth are tipped backward or if there is a need to bring the tooth crowns into a more upright position.