Orthodontic Treatment of Severe Bimaxillary Dentoalveolar Protrusion with Skeletal Class II Malocclusion Without Using Miniscrews

Authors

Yi-Wei Huang, Department of Orthodontics, Chi Mei Medical Center, Tainan, Taiwan
Chun-Liang Kuo, Department of Orthodontics, Chi Mei Medical Center, Tainan City, Taiwan; Center for General Education, South Taiwan University
I-Hua Liu, Department of Orthodontics, Chi Mei Medical Center, Tainan City, Taiwan; Min-Hwei Junior College of Health Care Management
Yu-Ling Tsai, Department of Dentistry, Chi Mei Medical Center, Chiali, Tainan, Taiwan; Department of Orthodontics, Chi Mei Medical Center, Yongkang, Tainan, Taiwan.
Chung-Li Wang, Department of Orthodontics, Chi Mei Medical Center, Tainan, Taiwan
Chun-Hsiu Yang, Department of Orthodontics, Chi Mei Medical Center, Tainan City, Taiwan

Abstract

Bimaxillary dentoalveolar protrusion is characterized by the proclined anterior teeth, protrusive lips, and a convex profile. A proper orthodontic treatment modality for efficient anchorage control is necessary to retract the anterior teeth and improve the facial esthetics significantly. The commonly used miniscrew could provide absolute anchorage, however, it is accompanied by some risks and complications, especially in adolescent females. This case report described a 16-year-old female with diagnosis of skeletal Class II, normal mandibular plane angle, and Angle Class I malocclusion associated with proclined upper and lower anterior teeth, excessive overjet, and a convex profile with lip incompetence. We extracted her four first premolars first. Then, the Tip-Edge Plus bracket system and differential force method were applied to replace the temporary anchorage device. The total treatment duration was 27 months. Her dentoalveolar protrusion was decreased, both lips were significantly retracted, the mentalis strain was reduced, and her chin projection was improved. This case demonstrated that differential tooth movement with controlled light orthodontic forces could be an effective strategy to treat severe bimaxillary protrusion.

Recommended Citation

Huang, Yi-Wei; Kuo, Chun-Liang; Liu, I-Hua; Tsai, Yu-Ling; Wang, Chung-Li; and Yang, Chun-Hsiu (2022) "Orthodontic Treatment of Severe Bimaxillary Dentoalveolar Protrusion with Skeletal Class II Malocclusion Without Using Miniscrews," Taiwanese Journal of Orthodontics: Vol. 34: Iss. 1, Article 6.
https://doi.org/10.38209/2708-2636.1121
Available at: https://www.tjo.org.tw/tjo/vol34/iss1/6

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