| 摘要 |
PURPOSE: An orthodontic coil spring is provided to enable a user to adjust the installation distance and elasticity of a coil spring. CONSTITUTION: An orthodontic coil spring comprises a side hook(30), a selection hanging hole(41), a length adjustment hook(40), and a coil spring(10). A plurality of length adjustment hooks is connected to one end of the side hook. The length and elasticity of the coil spring can be adjusted in correcting teeth row. The length adjustment hook can be injection molded using synthetic resin.
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