Contemporary orthodontics focuses mostly on the anteroposterior anchorage control but seldom on the vertical control for facial esthetics. Dentofacial deformities such as, excessive or inadequate upper gingiva and incisor show, uneven gingival line due to occlusal canting, and excessive or inadequate chin projection in adult patients have not been well addressed yet in orthodontics, although these problems could be solved surgically. The aim of this presentation is to present the orthodontic mechanisms and techniques with/without TADs for the vertical control of anterior and posterior teeth, smile arc, upper gingival line, and chin projection for achieving a reasonable facial esthetic improvement without orthognathic surgery. These include the orthodontic mechanisms of intrusion/extrusion of upper/lower dentitions with TADs, upward/downward rotation of mandible for the control of chin projection with TADs, and the correction of occlusal cant with yin-yang archwires without TADs.
Manage the excessive/inadequate gummy smile and incisor show through non-surgical orthodontic approaches.
Access to the orthodontic devices and mechanics for increasing or decreasing chin projection without surgery.
Perform the orthodontic mechanism of yin-yang archwires for the correction of occlusal cant without orthognathic surgery or TADs.
Chang Gung Memorial Hospital, Taipei, Taiwan
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