PHARYNGEAL AIRWAY VOLUME FOLLOWING ...

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perpendicular to Frankfort Horizontal represented the y- axis, or coronal plane (Figure 3.4). Figure 3.4: 3D Skull Depicting X, Y, Z Axis Three skeletal landmarks (nasion, point A, and point B) were identified. The A-P surgical movement of each jaw was calculated using the z-axis coordinate. The relative position of point A and point B to nasion was recorded for the pre-surgical and 2 week post-surgical scans and compared to determine the amount of advancement. It should be noted that the surgical technique utilized involved 34
counterclockwise rotation of the mandible; therefore the amount of mandibular advancement measured may not equal the size of the osteotomy gap. Statistics Data analysis was performed using SPSS 14.0 (SPSS Inc., Rainbow Technologies, Chicago, IL). Descriptive statistics calculated the mean, range, and standard deviation of the airway volume at each time point along with the percentage of volumetric change between time points. Paired t-tests and a Wilcoxon signed rank test were used to test for significant differences in airway volume. Pearson’s correlation was used to determine if a relationship existed between the amount of advancement of each jaw and the percentage of airway volume change between time points. For reliability testing, ten percent of the sample was randomly selected and remeasured. Cronbach’s alpha Inter-item Correlation was the statistic used to determine reliability. Results Descriptive statistics are summarized in Tables 3.1, 3.2, and 3.3. Figures 3.5, 3.6, and 3.7 show the mean 35
Page 1 and 2: PHARYNGEAL AIRWAY VOLUME FOLLOWING
Page 3 and 4: PHARYNGEAL AIRWAY VOLUME FOLLOWING
Page 5 and 6: ACKNOWLEDGEMENTS I would like to th
Page 7 and 8: LIST OF TABLES Table 3.1: Descripti
Page 9 and 10: CHAPTER 1: INTRODUCTION Combined or
Page 11 and 12: CHAPTER 2: REVIEW OF THE LITERATURE
Page 13 and 14: the posterior pharyngeal wall, 2 or
Page 15 and 16: mask discomfort, nasal dryness, and
Page 17 and 18: Tongue-Reduction Procedures Other s
Page 19 and 20: structures causes the airway muscle
Page 21 and 22: after surgery, the upper retropalat
Page 23 and 24: skeletal tissues, soft tissues, and
Page 25 and 26: Literature Cited 1. Schwab RJ, Gold
Page 27 and 28: 19. Wittels EH, Thompson S. Obstruc
Page 29 and 30: 37. Li KK, Guilleminault C, Riley R
Page 31 and 32: CHAPTER 3: JOURNAL ARTICLE Abstract
Page 33 and 34: patients often have elongated soft
Page 35 and 36: subsequent to orthognathic surgery
Page 37 and 38: years. Females had a mean age of 28
Page 39 and 40: Line from Sella to PNS Posterior of
Page 41: Line from Maxillary Incisor to Post
Page 45 and 46: Table 3.1: Descriptive Statistics f
Page 47 and 48: Volume (cubic mm) 30000.00 25000.00
Page 49 and 50: percent change from T0 to T2 (r=.55
Page 51 and 52: surrounding soft tissues encroachin
Page 53 and 54: the pre-surgical values, but there
Page 55 and 56: Conclusions 1. In this study, patie
Page 57 and 58: 10. Lyberg T, Krogstad O, Djupeslan
Page 59 and 60: 27. Li KK, Powell NB, Riley RW, Tro

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