| 摘要 |
<p>An orthodontic device adapted to be secured to a tooth, the device including: (a) a housing; (b) a channel, extending mesial-distally through the housing, and adapted for receiving an archwire; and (c) a biasing element, housed in the housing, and adapted to apply a force in a mesial direction on the archwire, when receiving in the channel.</p> |
