Comparative Study of Two Dimensional Measurements of Upper Airway by Two Dimensional Plain Film Transformed by CBCT and Lateral Head of Skull.

doi:10.13701/j.cnki.kqyxyj.2018.10.021

Abstract

Abstract: Objective: To study the differences of the same upper airway photographed by two-dimensional CBCT (CCB) and two-dimensional cranial lateral slice (LCR), and to analyze the reliability of two measurement methods. Methods: The CBCT of individual normal occlusion was transformed into two-dimensional radiographs. The two-dimensional CBCT and lateral cephalometric radiographs were respectively imported into Winceph8.0 to measure the airway distance. The intra-class correlation coefficient and the paired t test of variance were calculated in order by SPSS24.0 statistical software to test the reliability and the statistical significance of different measuring methods. Results: The results of pair t test found that there were statistical differences among PNS-Ba, PNS-Ad1, H-C3, and H-FH between two measurements. ICC values were all greater than 0.75, indicating the reliability of both measuring methods was relatively high. However, the average of ICC when transforming CBCT into a two-dimensional radiograph was 0.930, while that of lateral cephalometric radiographs was 0.830, indicating that the reliability of transforming CBCT data into two-dimensional radiographs was higher. Conclusion: The reliability of both measurement methods was high. However, the repeatability of transforming CBCT data into two-dimensional flat plate is higher than that of head lateral radiographs.

Key words: Normal occlusion, Cone-beam CT, Lateral cephalometric radiographs

MENG Yi-tong, ZHANG Xiao-dong.. Comparative Study of Two Dimensional Measurements of Upper Airway by Two Dimensional Plain Film Transformed by CBCT and Lateral Head of Skull.[J]. Journal of Oral Science Research, 2018, 34(10): 1117-1121.

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