Kochhar Anuraj Singh, Sidhu Maninder Singh, Bhasin Ritasha, Kochhar Gulsheen Kaur, Dadlani Himanshu, Sandhu Jagpreet, Virk Bobby
Former Orthodontist, Max Hospital, Gurgaon 122001, India.
Department of Orthodontics, Faculty of Dental Sciences, SGT University, Gurugram 122001, India.
World J Radiol. 2021 Feb 28;13(2):40-52. doi: 10.4329/wjr.v13.i2.40.
In growing patients with skeletal discrepancies, early assessment of functional factors can be vital for the restoration of normal craniofacial growth.
To compare airway volumes in patients with mandibular retrognathism with the normal anteroposterior skeletal relationship, thereby assessing the association between cephalometric variables and airway morphology.
Cone-beam computed tomography volume scans, and lateral cephalograms, 3-dimensional airway volume and cross-sectional areas of 120 healthy children (54 boys and 66 girls mean age 15.19 ± 1.28) which were done for orthodontic assessment were evaluated. The subjects were divided into 2 groups based on the angle formed between point A, Nasion and point B (ANB) values and cephalometric variables (such as anterior and posterior facial height, gonial angle ) airway volumes, and cross-sectional measurements were compared using independent tests. Pearson's correlation coefficient test was used to detect any relationship of different parts of the airway and between airway volume and 2-dimensional cephalometric variables.
Means and standard deviations for cephalometric, cross-sectional, and volumetric variables were compared. ANB, mandibular body length and facial convexity were statistically highly significant ( < 0.01) whereas condylion to point A, nasal airway and total airway volume ( < 0.05) were statistically significant. The nasal airway volume and the superior pharyngeal airway volume had a positive correlation ( < 0.01), nasal airway was correlated to middle ( < 0.05) and total airway superior had a relation with middle ( < 0.05), inferior and total airway ( < 0.05), middle was related to all other airways; inferior was also related to all the airways except nasal. Lateral cephalometric values were positively correlated with the airway volume with Frankfurt Mandibular Plane Angle and facial convexity showed significant correlations with total airway volume ( < 0.05). Additionally, ANB angle was significantly correlated with total airway volume and superior airway ( < 0.05).
The mean total airway volume in patients with retrognathic mandible was significantly smaller than that of patients with a normal mandible.
在骨骼发育异常的生长发育期患者中，早期评估功能因素对于恢复正常的颅面生长可能至关重要。
比较下颌后缩患者与具有正常前后骨骼关系患者的气道容积，从而评估头影测量变量与气道形态之间的关联。
对120名健康儿童（54名男孩和66名女孩，平均年龄15.19±1.28岁）进行正畸评估时所做的锥形束计算机断层扫描容积扫描和头颅侧位片、三维气道容积和横截面积进行评估。根据A点、鼻根点和B点之间形成的角度（ANB）值和头影测量变量（如前、后面部高度、下颌角）将受试者分为两组，使用独立样本t检验比较气道容积和横截面积测量值。采用Pearson相关系数检验来检测气道不同部位之间以及气道容积与二维头影测量变量之间的任何关系。
对头影测量、横截面和容积变量的均值及标准差进行了比较。ANB、下颌体长和面部凸度在统计学上具有高度显著性（P<0.01），而髁突至A点、鼻气道和总气道容积（P<0.05）在统计学上具有显著性。鼻气道容积与上咽部气道容积呈正相关（P<0.01），鼻气道与中部气道相关（P<0.05），总气道上部与中部气道相关（P<0.05）、下部气道和总气道相关（P<0.05），中部气道与所有其他气道相关；下部气道也与除鼻气道外的所有气道相关。头颅侧位测量值与气道容积呈正相关，法兰克福下颌平面角和面部凸度与总气道容积呈显著相关（P<0.05）。此外，ANB角与总气道容积和上部气道显著相关（P<0.05）。
下颌后缩患者的平均总气道容积明显小于正常下颌患者。
