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Table 5 Changes in pharyngeal airway space before (T0) and after (T1) surgery

From: Changes in the hyoid bone, tongue, and oropharyngeal airway space after mandibular setback surgery evaluated by cone-beam computed tomography

Variable T0 T1 ΔT1 − T0 P value
VP volume (mm3) 16777.20 ± 4689.63 13187.53 ± 4748.41 − 3589.67 ± 3054.52 0.000***
GP volume (mm3) 22952.70 ± 6983.11 18684.27 ± 6576.47 − 4268.43 ± 5020.01 0.000***
VP MCA (mm2) 325.43 ± 113.15 221.57 ± 131.54 − 103.85 ± 107.41 0.000***
GP MCA (mm2) 325.52 ± 121.94 219.24 ± 132.74 − 106.28 ± 103.08 0.000***
APW at VP (mm) 12.29 ± 3.21 9.77 ± 3.43 − 2.53 ± 2.57 0.000***
TRW at VP (mm) 27.75 ± 4.92 22.10 ± 8.17 − 5.65 ± 6.64 0.000***
APW at GP (mm) 12.36 ± 3.89 10.18 ± 3.75 − 2.18 ± 2.23 0.000***
TRW at GP (mm) 26.65 ± 5.44 21.56 ± 8.09 − 5.09 ± 7.41 0.001**
  1. Data are presented as mean ± standard deviation. Paired t tests were performed to determine significant differences in oropharyngeal airway space between T0 and T1. T0 before surgery, T1 1 month after surgery, VP velopharynx, GP glossopharynx, MCA minimal cross-sectional area, APW anteroposterior width, TRW transverse width
  2. *P < 0.05; **P < 0.01; ***P < 0.001