| 摘要 |
<p>An orthodontic bracket including a body including a bonding base for attachment to the tooth, a lingual vertical slot, a pair of laterally spaced gingival tie wings and a pair of laterally spaced occlusal tie wings, the gingival and occlusal tie wings projecting from a labial surface of the body; an archwire slot extending mesio-distally across the body and between the gingival and occlusal tie wings at opposed medial and distal sides of the body to accommodate an archwire; a locking shutter including at pair of resilient arm members and a lingual guide bar between the resilient arm members, the locking shutter moveable between an open position in which placement and removal of the archwire is facilitated and a closed position in which placement and removal of thearchwire is inhibited; first and second tracks formed on each of first and second outer lateral surfaces of thebody, extending from the gingival tie wings across the archwire slot and into theocclusal tie wings; the first and second tracks sized and otherwise dimensioned to receive thepair of resilient arm members therein. The first and second tracks extend in a substantially occlusal-gingival direction, angled gingivally by an angle with respect to a plane parallel with the vertical plane of a tooth on the outer lateral surfaces such that the first and second tracks.</p> |
