Orthodontics and Orthodontology Commons^™

Orthodontic Treatment Combined With Maxillary Posterior Subapical Osteotomy In Severe Anterior Open Bite, Jui-Hsien Yang, Yun-Yun Wu

Taiwanese Journal of Orthodontics

A 29-year-old woman presented with severe anterior open bite (−6 mm). Eight-month presurgical orthodontic treatment involving arch rounding and leveling was performed, with the upper arch treatment from canine to canine only. Bilateral maxillary posterior subapical osteotomy (PSO) for posterior intrusion was performed for 6-week fixation. Postsurgical orthodontic treatment followed, resulting in a total treatment time of 19 months. Cephalometric X-ray superimposition revealed that the anterior overbite was corrected by 9 mm (from -6mm to +3 mm), and the lower mandibular plane angle changed from 38.4° to 35.4°. Therefore, counterclockwise rotation of the mandible improved the facial profile. In conclusion, …