ZW SS .Ant .021×.025 SS Pos.018x.018 34m Upper - PK/5
- With technology advancement, the dream of having two wire sizes or materials built into the same archwire becomes a reality
- The anterior segment is thicker to maintain torque while the posterior segment is thinner for less friction during retraction.
- Joining hook could be used for elastics, coils or lacebacks.
- Size is measured by the distance between the inter-hook.