| 摘要 |
A lingual orthodontic bracket includes a body (12) having a three-sided archwire slot (14, 414), and a hinged closure member (22, 422) pivotally and pivotable across the archwire slot and into a closed position in the closure member slot. The closure member includes a cam shaped central portion (28, 428A, 428B) extending across the archwire to retain it in the archwire slot under shear. The cam portion is convexly shaped to seat the archwire in the slot during closure. A bumper or rotation member (340, 440) can be used to bias the archwire against the closure member. The closure member (422) is formed with two sides that enclose the sides of the bracket and locking ears (425A, 425B) that engage the bracket body. The bracket includes two oppositely directed wings (418, 426) for receiving a ligature or O-ring.
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