Bimaxillary protrusion is defined as convex profile with protrusive upper and lower lips. Therefore the orthodontic treatment goal is to correct the proclination of upper and lower incisors by retracting the incisors into the space usually resulted from four bicuspid extractions. However, with extraordinary development of temporary anchorage device as skeletal anchorage, non-extraction approach could be a treatment option for patients with mild to moderate bimaxillary protrusion. In this case report, we present the treatment of a 28-year-old female patient with skeletal Class II, high mandibular plane angle, and dental Class I bimaxillary protrusion, which combined with gummy smile and also altered/delayed passive eruption at her upper anterior teeth. After two years of orthodontic treatment, total arch distalization of upper and lower dentition was accomplished with upper bilateral miniplates and lower miniscrews. Afterwards, periodontal surgery was done to lengthen the crown for improving the ratio of crown height/width, and to improve gingival color at her upper anterior teeth. Great improvement of her lateral profile and diminishment of the dentoalveolar protrusion were achieved by orthodontic treatment. One- year follow-up records revealed good stability for both profile and occlusion.
Tsai, Shu-Chun; Chang, Hau-Hueng; Wang, Chen-Ying; and Yao, Chung-Chen Jane
"Total Arch Distalization to Reduce Bimaxillary Protrusion with Temporary Anchorage Devices,"
Taiwanese Journal of Orthodontics: Vol. 24:
3, Article 5.
Available at: https://www.tjo.org.tw/tjo/vol24/iss3/5