Oh Kyung-Min, Kim Min-Ah, Youn Jong-Kuk, Cho Hyung-Jun, Park Yang-Ho
Department of Orthodontics, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea.
Korean J Orthod. 2013 Aug;43(4):160-7. doi: 10.4041/kjod.2013.43.4.160. Epub 2013 Aug 22.
To evaluate the shapes and sizes of nasopharyngeal airways by using cone-beam computed tomography and to assess the relationship between nasopharyngeal airway shape and adenoid hypertrophy in children.
Linear and cross-sectional measurements on frontal and sagittal cross-sections containing the most enlarged adenoids and nasopharyngeal airway volumes were obtained from cone-beam computed tomography scans of 64 healthy children (11.0 ± 1.8 years), and the interrelationships of these measurements were evaluated.
On the basis of frontal section images, the subjects' nasopharyngeal airways were divided into the following 2 types: the broad and long type and the narrow and flat type. The nasopharyngeal airway sizes and volumes were smaller in subjects with narrow and flat airways than in those with broad and long airways (p < 0.01). Children who showed high adenoid-nasopharyngeal ratios on sagittal imaging, indicating moderate to severe adenoid hypertrophy, had the narrow and flat type nasopharyngeal airway (p < 0.01).
Cone-beam computed tomography is a clinically simple, reliable, and noninvasive tool that can simultaneously visualize the entire structure and a cross section of the nasopharyngeal airway and help in measurement of adenoid size as well as airway volume in children with adenoid hypertrophy.
利用锥形束计算机断层扫描评估鼻咽气道的形状和大小，并评估儿童鼻咽气道形状与腺样体肥大之间的关系。
从64名健康儿童（11.0±1.8岁）的锥形束计算机断层扫描中获取包含最大腺样体和鼻咽气道体积的额面和矢状面的线性及横断面测量数据，并评估这些测量数据之间的相互关系。
根据额面图像，受试者的鼻咽气道分为以下两种类型：宽长型和窄平型。窄平气道受试者的鼻咽气道尺寸和体积小于宽长气道受试者（p<0.01）。矢状面成像显示腺样体-鼻咽比值高，表明中度至重度腺样体肥大的儿童具有窄平型鼻咽气道（p<0.01）。
锥形束计算机断层扫描是一种临床简单、可靠且无创的工具，可同时可视化鼻咽气道的整个结构和横断面，并有助于测量腺样体肥大儿童的腺样体大小及气道体积。
