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Table 4 Measurements and comparison of the pharyngeal airway in group 1 (BSSRO)

From: Postoperative changes in the pharyngeal airway space through computed tomography evaluation after mandibular setback surgery in skeletal class III patients: 1-year follow-up

Variable T0 T1 T2 T3 T0–T1 T0–T2 T0–T3 T1–T2 T2–T3
Mean ± SD
Nph AP 13.35 ± 2.80 12.39 ± 2.63 12.60 ± 2.70 12.48 ± 2.16 0.022* 0.070 0.065 0.630 0.761
Oph AP 12.30 ± 4.31 10.05 ± 4.20 10.20 ± 3.72 11.12 ± 4.33 0.000** 0.001** 0.025* 0.783 0.095
Hph AP 17.70 ± 4.55 15.93 ± 4.00 15.30 ± 4.14 16.67 ± 4.98 0.016* 0.003** 0.184 0.279 0.038*
Nph vol 6.23 ± 2.84 5.89 ± 2.93 5.65 ± 2.53 5.53 ± 2.73 0.239 0.049* 0.089 0.308 0.645
Oph vol 6.04 ± 2.80 4.24 ± 2.27 4.46 ± 2.49 4.10 ± 2.06 0.000** 0.000** 0.000** 0.516 0.245
Hph vol 7.80 ± 3.99 5.94 ± 3.84 5.93 ± 3.09 6.04 ± 3.65 0.000** 0.000** 0.002** 0.982 0.750
Whole pharynx vol 20.07 ± 8.22 16.07 ± 7.52 16.03 ± 6.70 15.67 ± 7.17 0.000** 0.000** 0.001** 0.962 0.622
SV-B 64.97 ± 7.88 60.12 ± 5.46 60.52 ± 6.09 60.86 ± 5.51 0.000** 0.000** 0.000** 0.466 0.321
  1. *Significant at p < 0.05, **Significant at p < 0.01
  2. BSSRO bilateral sagittal split ramus osteotomy, T0 before surgery, T1 2 months after surgery, T2 6 months after surgery, T3 1 year after surgery, Nph AP anteroposterior distance of nasopharynx, Oph AP anteroposterior distance of oropharynx, Hph AP anteroposterior distance of hypopharynx, Nph vol nasopharynx volume, Oph vol oropharynx volume, Hph vol hypopharynx volume, SV-B distance from the sella vertical plane to the B point