Title Page
Contents
Abstract 6
I. Introduction 8
II. Material and methods 9
III. Results 15
IV. Discussion 16
V. Conclusion 17
VI. References 18
국문 초록 33
Table 1. Landmarks and Reference planes used in the study. 21
Table 2. Cross-sectional area (cm²) in different planes. (Mean ± SD) 22
Table 3. Total volume (cm³) of the pharyngeal airway. (Mean ± SD) 22
Table 4. Results of CFD simulations. 23
Table 5. Correlation between surgical changes and airflow characteristics. (r=spearman correlation coefficient) 24
Table 6. Correlation of cross-sectional area and skeletal changes. (r=spearman correlation coefficient) 26
Figure 1. Skeletal measurements using Superimposition of the pre and post CBCT. 28
Figure 2. Reorientation of the CBCT according to Frankfort horizontal plane. 29
Figure 3. Superimpositioning of the pre and post-surgery CBCT. (A) Firstly, point registration function was used by marking stable landmarks in pre and post CBCT. (B)... 29
Figure 4. Different planes for cross-sectional measurement. Boundary of the upper airway studied between Plane 1 and Plane 5. 30
Figure 5. (A) Segmented pharyngeal airway. (B) Anatomical model of pharyngeal airway was made from both pre and post CBCT. 30
Figure 6. Superimposition of pre and post pharyngeal airway model. 31
Figure 7. Streamlines distribution in a patient at inspiration phase (t=1.25s) 32