Effect of mandibular setback surgery and bimaxillary surgery in patients with skeletal class III deformity on pharyngeal airway change by using cone beam computed tomographic measurement

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Sittipong Chaimanakarn
Nattinee Chaiudomsom
Watus Sakdejayont


            The common abnormal relationship of jaw is skeletal class III deformity which can be corrected by various jaw surgical techniques. The most commonly used technique for correcting this type of deformity is mandibular setback surgery or bimaxillary surgery, which results in the jaw position. Said that it affects the pharyngeal airway changes. Many studies report a decrease in the airway after the jaw surgery, mainly measured by lateral cephalometric radiographs. But currently, there are computed tomography which can be demonstrated in a three-dimension and illustrated the anatomy of the airway more clearly. Due to the report of the study that found that the decrease of the airway may be one of the factors that can cause sleep apnea, so the objective of this review article is to gather and evaluate the pharyngeal airway changes after the mandibular setback and bimaxillary surgery in patients with skeletal class III deformity by using computed tomography and to evaluate the correlation of pharyngeal airway changes with sleep apnea.


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Chaimanakarn S, Chaiudomsom N, Sakdejayont W. Effect of mandibular setback surgery and bimaxillary surgery in patients with skeletal class III deformity on pharyngeal airway change by using cone beam computed tomographic measurement. M Dent J [Internet]. 2019 Dec. 26 [cited 2023 Dec. 11];39(3):243-55. Available from: https://he02.tci-thaijo.org/index.php/mdentjournal/article/view/191826
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