| 摘要 |
An orthodontic bracket system for edgewise orthodontic therapy which is adapted for attachment to the lingual surface portions of a patient's teeth. The lingual orthodontic bracket system of this invention is designed to permit occlusal and mesial insertion of an edgewise archwire into precision archwire slots that are defined by the respective brackets of incisors, cuspids, bicuspids and molars. At least some of the lingual orthodontic brackets incorporate fulcrum controlled twin tie wing systems to permit efficient controlled rotation of the teeth as well as archwire tipping and torque activities. The lingual bracket system of this invention also incorporates a molar tube that is designed for mesio-occlusal insertion of the end portion of the edgewise archwire and also permits pivoting or rotation of the archwire about the molar tube structure so as to bring the archform portion thereof occlusally into properly seated relation with respect to the archwire slots of other brackets.
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