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

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

	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 *

ISSN: 1746-160X