Firwana Alqassam, Wang Hua, Sun Lian, Wang Jialu, Zhang Wei-Bing
Department of Orthodontics, Institute of Stomatology, Nanjing Medical University, Jiangsu Key Laboratory of Oral Diseases, Nanjing, Jiangsu, China.
Indian J Dent Res. 2019 May-Jun;30(3):368-374. doi: 10.4103/ijdr.IJDR_526_18.
This study aims to evaluate the pharyngeal airway dimensions among Chinese adults in relation to Class I and Class II facial skeletal patterns using three-dimensional cone-beam computed tomography (CBCT) images.
A total of 156 initial CBCT images were evaluated, which were classified into skeletal Class I and Class II according to ANB angle with mean (SD) age being 22.56 ± 4.0 years and 22.32 ± 3.6 years. The pharyngeal airway volume, airway area, minimum cross-sectional area (MCA) and the distance from uvula (tip of the soft palate) to mental spine (U-MS distance) were assessed with Dolphin imaging software.
Compared with Class I group, Class II group displayed significantly smaller pharyngeal airway volume, airway area and MCA (P <.01, P =0.03, and P =0.008, respectively), and shorter U-MS distance (P <.001). Comparing gender subgroups, the female subgroup showed the smallest airway measurement. Spearman correlation test results showed that the airway volume and area had a significant positive correlation with U-MS distance (r = 0.22, P = 0.005, and r = 0.28, P < 0.005, respectively) and negative correlation with ANB angle (r = -0.23, P = 0.002, and r = -0.21, P = 0.007, respectively).
Pharyngeal airway volume, airway area, MCA, and the U-MS distance were smaller in skeletal Class II than Class I Chinese adult subjects and lower in female Class II subgroup. Additionally, there was a correlation observed between the mandibular distance (U-MS), ANB angle and airway size.
本研究旨在使用三维锥形束计算机断层扫描（CBCT）图像评估中国成年人中与I类和II类面部骨骼模式相关的咽气道尺寸。
共评估了156例初始CBCT图像，根据ANB角将其分为骨骼I类和II类，平均（标准差）年龄分别为22.56±4.0岁和22.32±3.6岁。使用Dolphin成像软件评估咽气道容积、气道面积、最小横截面积（MCA）以及从悬雍垂（软腭尖端）到颏棘的距离（U-MS距离）。
与I类组相比，II类组的咽气道容积、气道面积和MCA显著更小（分别为P<.01、P = 0.03和P = 0.008），且U-MS距离更短（P<.001）。比较性别亚组，女性亚组的气道测量值最小。Spearman相关性检验结果显示，气道容积和面积与U-MS距离呈显著正相关（分别为r = 0.22，P = 0.005和r = 0.28，P<.005），与ANB角呈负相关（分别为r = -0.23，P = 0.002和r = -0.21，P = 0.007）。
骨骼II类中国成年受试者的咽气道容积、气道面积、MCA和U-MS距离比I类受试者更小，且在II类女性亚组中更低。此外，在下颌距离（U-MS）、ANB角和气道大小之间观察到相关性。
