Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5637804 | American Journal of Orthodontics and Dentofacial Orthopedics | 2016 | 13 Pages |
Abstract
To achieve optimum occlusal and facial results in a patient with high-angle maxillary protrusion, it is important to move Point A back with retraction of the anterior teeth and prevent clockwise rotation of the mandible through good vertical control. A woman, aged 42Â years 5Â months, with a protrusive profile sought lingual orthodontic treatment. She had a skeletal Class II high-angle pattern with maxillary protrusion and mandibular retrusion. The extraction of the 4 first premolars was indicated to correct the problems. The vertical bowing effect, a side effect known to occur with conventional lingual bracket systems owing to torque loss, would preclude adequate retraction of Point A and compromise the facial results. To prevent this issue, a fully customized lingual bracket system with vertical slots for the anterior teeth using ribbon-wise archwires was selected. A midpalatal miniscrew was used to prevent molar extrusion. As a result, the bodily retraction of the maxillary incisors and Point A was achieved, obtaining an attractive facial profile.
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Authors
Toru Inami, Yuko Nakano, Ken Miyazawa, Masako Tabuchi, Shigemi Goto,