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Types of wires (0.016-inch nickel titanium and 0.017 × 0.025-inch stainless steel) and tested bracket. A, Uncoated wire (G&H Orthodontics, Franklin, IN, USA); B, Dany coated arch wire (DANY BMT, Anyang, Korea); C, Sentalloy® and White wire (Tomy Inc., Futaba, Japan); D, maxillary premolar Clippy-C® bracket (Tomy Inc.).
