Martins Luize Severo, Liedke Gabriela Salatino, Heraldo Luis Dias da Silveira, da Silveira Priscila Fernanda, Arus Nadia Assein, Ongkosuwito Edwin M, Vizzotto Mariana Boessio
Department of Surgery and Orthopedics, Oral Radiology Division, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
Department of Stomatology, Oral Radiology Division, Federal University of Santa Maria, Brazil.
Eur J Orthod. 2018 May 25;40(3):262-267. doi: 10.1093/ejo/cjx067.
No consensus exists on the assessment of airway in CBCT scans. Two-dimensional measures remain the standard in the cephalometric analysis. This research aimed to evaluate linear and area measurements in two-dimensional views from specific airway regions of interest and compare these to the correspondent volume in CBCT exams.
250-selected CBCT scans were retrospectively analyzed. A trained and calibrated examiner performed the linear, area and volume measurements in specific sites for nasal cavity, nasopharynx and oropharynx compartments. Dolphin Software was used for the analysis. The correlations were performed using Pearson coefficient.
The highest positive correlations were observed in the nasopharynx and oropharynx sagittal areas and the most constricted area in the oropharynx. Nasopharynx linear measures and nasopharynx coronal area did not present correlation with whole volume. Two-dimensional measurements in the soft palate (width and sagittal area) showed very low positive correlations. Although nasal cavity presented highest volume means, changes in oropharynx contributed more to variations in total volume, compared with the other two sections.
Airway sagittal areas, as well as the most constricted axial area in oropharynx remains a useful guide to correlate with airway volume in two-dimensional images.
在锥形束计算机断层扫描（CBCT）中，气道评估尚无共识。二维测量仍是头影测量分析的标准方法。本研究旨在评估特定气道感兴趣区域二维视图中的线性和面积测量，并将其与CBCT检查中的相应体积进行比较。
回顾性分析250例选定的CBCT扫描。由一名经过培训和校准的检查人员对鼻腔、鼻咽和口咽腔的特定部位进行线性、面积和体积测量。使用Dolphin软件进行分析。采用Pearson系数进行相关性分析。
在鼻咽和口咽矢状面区域以及口咽最狭窄区域观察到最高的正相关性。鼻咽线性测量和鼻咽冠状面面积与总体积无相关性。软腭的二维测量（宽度和矢状面面积）显示出非常低的正相关性。尽管鼻腔的平均体积最大，但与其他两个部分相比，口咽的变化对总体积变化的贡献更大。
气道矢状面面积以及口咽最狭窄的轴位面积仍是二维图像中与气道体积相关的有用指标。
