| 摘要 |
<p>An improved edgewise orthodontic bracket is disclosed. In one embodiment, a bracket (10) comprises a single pair of opposing T-shaped tie wings (12, 14) which define an archwire slot (18) therebetween. Notches (20) are provided on each of the mesial and distal sides of the center leg (28) of each T-shaped tie wing (12, 14) for selectively receiving a ligating device. The notches (20) are defined in the gingival/occlusal edges of the tie wings (12, 14) and comprise sloped portions (24) that extend labially towards the archwire slot (18). Convex sidewall portions (42) and convex floor portions (44) are provided in the archwire slot (18) adjacent to the notches (20). An auxialiary slot (70) may be centrally disposed under the center legs (28) of the opposing T-shaped tie wings (12, 14). Alternatively, twin auxiliary slots (80) may be disposed under the convex archwire slot floor portions (44). An integral T-shaped hook (50) may be provided as a cantilevered extension from the center legs (28) of one of the T-shaped tie wings (12, 14). Alternatively, twin auxiliary slots (80) may be disposed under the convex archwire slot floor portions (44). An integral T-shaped hook (50) may be provided as a cantilevered extension from the center leg (28) of one of the T-shaped tie wings (12, 14) for use in attachment of traction devices.</p> |
