Iwasaki Tomonori, Sato Hideo, Suga Hokuto, Takemoto Yoshihiko, Inada Emi, Saitoh Issei, Kakuno Eriko, Kanomi Ryuzo, Yamasaki Youichi
Field of Developmental Medicine, Health Research Course, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.
Field of Developmental Medicine, Health Research Course, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.
Am J Orthod Dentofacial Orthop. 2017 May;151(5):929-940. doi: 10.1016/j.ajodo.2016.10.027.
The purpose of this study was to clarify the relationships between upper airway factors (nasal resistance, adenoids, tonsils, and tongue posture) and maxillofacial forms in Class II and III children.
Sixty-four subjects (mean age, 9.3 years) with malocclusion were divided into Class II and Class III groups by ANB angles. Nasal resistance was calculated using computational fluid dynamics from cone-beam computed tomography data. Adenoids, tonsils, and tongue posture were evaluated in the cone-beam computed tomography images. The groups were compared using Mann-Whitney U tests and Student t tests. The Spearman rank correlations test assessed the relationships between the upper airway factors and maxillofacial form.
Nasal resistance of the Class II group was significantly larger than that of the Class III group (P = 0.005). Nasal resistance of the Class II group was significantly correlated with inferior tongue posture (P <0.001) and negatively correlated with intermolar width (P = 0.028). Tonsil size of the Class III group was significantly correlated with anterior tongue posture (P <0.001) and mandibular incisor anterior position (P = 0.007). Anterior tongue posture of the Class III group was significantly correlated with mandibular protrusion.
The relationships of upper airway factors differ between Class II and Class III children.
本研究旨在阐明Ⅱ类和Ⅲ类错颌儿童的上气道因素（鼻阻力、腺样体、扁桃体和舌位）与颌面形态之间的关系。
64名错颌畸形受试者（平均年龄9.3岁）根据ANB角分为Ⅱ类和Ⅲ类组。使用锥束计算机断层扫描数据通过计算流体动力学计算鼻阻力。在锥束计算机断层扫描图像中评估腺样体、扁桃体和舌位。使用曼-惠特尼U检验和学生t检验对两组进行比较。Spearman等级相关检验评估上气道因素与颌面形态之间的关系。
Ⅱ类组的鼻阻力显著大于Ⅲ类组（P = 0.005）。Ⅱ类组的鼻阻力与舌低位显著相关（P <0.001），与磨牙间宽度呈负相关（P = 0.028）。Ⅲ类组的扁桃体大小与舌前位显著相关（P <0.001）和下颌切牙前突（P = 0.007）。Ⅲ类组的舌前位与下颌前突显著相关。
Ⅱ类和Ⅲ类儿童的上气道因素之间的关系有所不同。
