Kim Min-Ah, Kim Bo-Ram, Youn Jong-Kuk, Kim Yoon-Ji R, Park Yang-Ho
Department of Orthodontics, Kangdong Sacred Heart Hospital, Hallym University Medical Center, Gil-dong 445, Gangdong-gu, Seoul 134-701, Republic of Korea.
Graduate School of Hallym University, Seoul, Republic of Korea.
J Craniomaxillofac Surg. 2014 Jul;42(5):531-5. doi: 10.1016/j.jcms.2013.07.022. Epub 2013 Aug 28.
The purpose of this study was to evaluate head posture and the pharyngeal airway volume changes using 3D imaging after bimaxillary surgery in mandibular prognathism patients by null hypothesis.
Cone-beam computed tomography (CBCT) scans were obtained for 25 mandibular prognathism patients before bimaxillary surgery (T1) and 6 months after surgery (T2). The head posture of each patient was assessed by measuring cranio-cervical angle on a midsagittal plane passing through the anterior nasal spine at T1 and T2. Additionally, the volume of each subject's pharyngeal airway was measured using InVivoDental 3D imaging software.
The cranio-cervical angle increased significantly 6 months after bimaxillary surgery (p < 0.01). The total volume of the pharyngeal airway slightly decreased (p > 0.05) at the same timepoints, while naso- and oro-pharyngeal airway volume decreased significantly (p < 0.05, p < 0.05). There was significant relationship between the changes of head posture and those of total airway volume (p < 0.05).
The null hypothesis was rejected. Bimaxillary surgery resulted in significant head flexion and a slight decrease in total pharyngeal airway volume.
本研究旨在通过零假设评估下颌前突患者双颌手术后使用三维成像技术观察头部姿势和咽气道容积的变化。
对25名下颌前突患者在双颌手术前（T1）和术后6个月（T2）进行锥形束计算机断层扫描（CBCT）。通过在T1和T2时在穿过前鼻棘的正中矢状面上测量颅颈角来评估每位患者的头部姿势。此外，使用InVivoDental三维成像软件测量每位受试者的咽气道容积。
双颌手术后6个月颅颈角显著增加（p < 0.01）。在相同时间点，咽气道总体积略有下降（p > 0.05），而鼻咽和口咽气道容积显著下降（p < 0.05，p < 0.05）。头部姿势变化与总气道容积变化之间存在显著相关性（p < 0.05）。
零假设被拒绝。双颌手术导致头部显著前屈，咽气道总体积略有下降。
