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Table 4 The airway changes after orthognathic surgery in thirty skeletal Class III patients

From: Quantitative changes of upper airway in class III patients undergoing bimaxillary surgery after one-year follow-up: a retrospective study

  pre-surgery
mean ± SD
A year post-surgery
mean ± SD
Differences
mean ± SD
P
Volume(mm3)
 Total airway volume 29,651.9 ± 10,143.7 28,138 ± 9004.6 − 1513.9 ± 4341.4 0.066
 Nasopharynx airway 9333.2 ± 2883.8 10,346.7 ± 3566.8 1013.5 ± 1348.2 0.000***
 Retropalatal airway 13,496.9 ± 5432.6 12,121 ± 4574.5 − 1375.9 ± 2403.4 0.004**
 Retroglossal airway 6821.7 ± 3925.2 5670.3 ± 2729.7 − 1151.4 ± 2660.7 0.025*
Cross section area(mm2) at the level of
 Palatal 650 ± 170 653.5 ± 184.8 3.5 ± 95.2 0.841
 Soft palatal 422.8 ± 150.6 390.3 ± 137.3 −32.5 ± 77.4 0.029*
 Tongue 375.5 ± 145.6 303.3 ± 122.3 −72.1 ± 98 0.000***
 Epiglottis 359.9 ± 129.8 301.5 ± 99.6 −58.3 ± 101 0.004**
Width(mm) at the level of
 Palatal plane 33 ± 5 32.8 ± 5.3 −0.3 ± 2.6 0.582
 Soft palatal 34.8 ± 7.7 31.6 ± 6.2 −3.2 ± 4.9 0.001**
 Tongue 32.1 ± 4.3 29.2 ± 4.8 −2.9 ± 1.7 0.000***
 Epiglottis 32.5 ± 4.2 31.3 ± 3.8 −1.2 ± 2.2 0.007
Anteroposterior length (mm) at the level of
 Palatal plane 21.1 ± 4.2 23.2 ± 4.4 2.1 ± 2.5 0.000***
 Soft palatal 15.7 ± 2.8 14.5 ± 3 −1.2 ± 1.1 0.000***
 Tongue 14.3 ± 3.6 12.8 ± 3.7 −1.5 ± 3.1 0.012 *
 Epiglottis 14.2 ± 3.9 12.7 ± 3.3 −1.5 ± 3.3 0.019 *
  1. Paired t test: *p < 0.05, **p < 0.01, ***p < 0.001