BT Circle Wire is an orthodontic arch‑wire used in braces — part of the system that applies controlled force to gradually move teeth into alignment. It appears under Ni‑Ti (nickel‑titanium) wire type (sometimes listed as “Tiggle Ni‑Ti Wire” for BT Circle Wire).

• Flexible / shape‑memory alloy (Ni‑Ti): As a Ni‑Ti archwire, BT Circle Wire likely offers a gentle, consistent force with elasticity that helps align teeth gradually good for early stages of orthodontic treatment.

• Suitable for alignment / leveling phases: Archwires like these are typically used for the initial phase of braces treatment, when teeth are crowded or misaligned, requiring gentle, continuous force rather than high rigidity.

• Formable to arch shape: As with other archwires, it can be pre‑shaped or adapted to fit the patient’s dental arch, helping guide teeth along the intended arch form.

• Corrosion‑resistant / medically compatible material: Orthodontic archwires (including Ni‑Ti wires) are designed to be biocompatible and resistant to corrosion and fatigue under the oral environment.