Upper airway dimensions before and after insertion of the oral appliance
| Before2-150 | After2-150 | Change2-151 | % change2-151 | p value2-152 | |
|---|---|---|---|---|---|
| Cross sectional area (mm2) | |||||
| Hypopharynx | 67 (12–237) | 64 (34–251) | 126 (109 to 181) | 18 (3 to 35) | <0.02 |
| Oropharynx | 103 (39–235) | 115 (40–297) | 12 (−5 to 45) | 11 (−1 to 43) | NS |
| Velopharynx | 96 (43–281) | 126 (57–283) | 24 (10 to 44) | 25 (11 to 69) | <0.005 |
| Anteroposterior diameter (mm) | |||||
| Hypopharynx | 9.4 (3.0–12.5) | 11.0 (4.2–14.4) | 1.1 (−0.2 to 2.4) | 12 (−1 to 36) | NS |
| Oropharynx | 9.6 (4.2–15.1) | 10.2 (7.3–16.4) | 1.1 (−0.16 to 2.28) | 8 (−3 to 39) | NS |
| Velopharynx | 7.8 (4.7–19.9) | 9.6 (5.8–21.4) | 1.4 (−0.7 to 3.4) | 26 (−1 to 43) | NS |
| Lateral diameter (mm) | |||||
| Hypopharynx | 11.6 (5.3–24.3) | 13.2 (7.6–23.7) | 1.2 (−0.3 to 2.3) | 7 (−6 to 31) | NS |
| Oropharynx | 17.4 (11.9–22.2) | 18.2 (11.5–27.0) | 1.0 (−1.6 to 3.4) | 6 (−8 to 19) | NS |
| Velopharynx | 14.5 (7.4–28.1) | 17.0 (9.9–33.9) | 2.5 (1.0 to 4.2) | 14 (8 to 33) | <0.005 |
| Anteroposterior/lateral diameter | |||||
| Hypopharynx | 0.74 (0.24–1.65) | 0.60 (0.25–1.34) | 0.0 (−0.2 to 0.1) | NS | |
| Oropharynx | 0.53 (0.25–0.86) | 0.53 (0.39–0.78) | 0.0 (−0.05 to 0.08) | NS | |
| Velopharynx | 0.49 (0.24–1.87) | 0.51 (0.32–1.44) | 0.04 (−0.2 to 0.10) | NS | |