| 摘要 |
<p>This invention is directed to a plastic orthodontic bracket (10) reinforced with a metal insert (22) having rotation wings (28). The bracket (10) includes a protrusion (30) extending into the archwire slot (16) and having an upper end (34) elevated above the bottom wall (18) of the archwire slot (16). The upper end (34) of the protrusion (30) is adapted to contact the underside of an orthodontic archwire located in the archwire slot (16) and to support at least a portion of the archwire above the bottom wall (18) of the archwire slot (16).</p> |
