The ends of torsion springs are attached to other components, and when those components rotate around the center of the spring, the spring tries to push them back to their original position. This type of spring is normally close wound but can have pitch to reduce friction between the coils.
Item Tag: 16*22
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10Pcs/Bag Dental Ortho Anterior Teeth Torquing Spring Rectangular Wire S/M/L
Application torque spring before the main arch wire with 0.46 mm x 0.64 mm stainless steel wire, the torque hole through the main arch wire fixed on both ends of the spring, strength of the single spring torque with crowns are angled lip not to exceed 90°, strength direction for the direction of the coil spring open.