骨格性下顎前突症における顎骨移動術前後の咽頭部気道形態および舌骨の変化

概要

論文の詳細を見る
The purpose of this study is to evaluate morphological changes in the pharyngeal airway and the hyoid bone position due to orthognathic surgery of mandibular prognathism patients. Eleven patients (3 males and 8 females) who had undergone a sagittal split ramus osteotomy (SSRO group) and 18 patients (6 males and 12 females) treated by both Le Fort I and sagittal split ramus osteotomy (Le Fort I group) were examined. The pre- and post-surgical lateral cephalograms were analyzed for each group. The results were as follows. 1. In the SSRO group the middle and inferior parts of the pharyngeal airway became narrow after the surgery, whereas in the Le Fort I group the entire pharyngeal airway became narrow. 2. The SSRO group showed a larger amount of downward positioning of the hyoid bone than the Le Fort I group, corresponding to the larger amount of mandibular set-back after surgery. 3. There were no changes in either group in the anteroposterior position of the hyoid bone in relation to the cervical vertebrae after the surgery. 4. Regarding the mandibular set-back after surgery, the downward positioning of the hyoid bone may indicate a compensatory change to keep the airway from becoming narrow.
福岡歯科大学学会の論文
2004-03-23