Surgical clockwise pitch rotation of the maxillo-mandibular complex could change the occlusal plane angulation and thereby open the bite. This procedure also increases the mandibular plane angle by forcing the lower face to turn backward and downward; it is the key to correct both skeletal and dental Class III malocclusions.
This case report presents a skeletal deformaty which primarily resulted from excessive transverse growth and reduced vertical growth in the midface and upper dentition. The counterclockwise growth rotation and excessive forward growth mandible aggravated the sagittal jaw bone discrepancy. The dental effect included canted maxillary occlusal plane and severe attrition of the upper teeth. By the combined treatment with orthognathic surgery and orthodontics, the patient with extreme low mandibular plane angle could be well treated to proper facial proportion and harmonization.
Hou, Chih-Hsun; Liu, Yi-Min; Pan, Chia-Yi; and Tsai, Huei-Mei
"Surgical Alteration of Occlusal Plane Angulation Followed by Orthodontic Application of TADs and Yin-Yang Arch Wire in Hypodivergent Prognathic Malocclusion,"
Taiwanese Journal of Orthodontics: Vol. 33
, Article 4.
Available at: https://www.tjo.org.tw/tjo/vol33/iss3/4
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