钛镍弓丝矫正器是一种高性能、回弹性好、具有形状记忆效应的牙齿矫正器，对多种类型的牙颌畸形都有良好的矫治效果。但是，当扩大牙弓、打开前牙咬合时，需要在两侧弓丝的末端各焊接一个U型簧，由于焊接处理时U型簧焊接处弓丝会变软而失去弹性，弓丝易折断而影响矫治效果。我 The titanium-nickel arched wire orthodontic appliance is a high-performance, resilience-resistant, shape memory effect dental braces that have good curative effects on many types of dental malformations. However, when enlarging the dental arch and opening the anterior teeth, it is necessary to weld a U-shaped spring at the ends of the archwires on both sides. Since the U-shaped spring welding wire at the welding position will become soft and lose its elasticity, the archwire is easily broken. And affect the correction effect. I