Evaluation of oropharyngeal airway in adolescence with Class Ⅰand Class Ⅱsagittal skeletal patterns on cone-beam computed tomography images

doi:10.3877/cma.j.issn.1674-1366.2011.02.012

Abstract

Abstract:

Objective

To compare the oropharyngeal airway dimension in adolescence with Class Ⅰand Class Ⅱsagittal skeletal patterns and to investigate correlations between the airway dimension and the maxillofacial variables in these adolescence.

Methods

Forty adolescence aged from 11 to 16 years were divided into two groups based on their ANB angles，and the two groups were matched for age and sex.Each subject presented a normodivergent skeletal pattern.Three-dimensional airway volumes and cross-sectional areas were measured by using cone-beam computed tomography volume scans， and two-dimensional lateral cephalograms were created and analyzed.Airway lengths， volumes and cross-sectional measurements were compared between the two groups.Correlation analyses about oropharyngeal airway dimension with the maxillofacial variables were carried out.

Results

No statistically significances between the two groups were found in the cross-sectional and volumetric measurements of the airway （P ＞0.05）.The oropharyngeal airway dimension had positive correlation with ANS-PNS， Go-Me， Ar-Gn （P ＜0.05）， and had no correlation with ANB， NA-PA， FH-NP （P ＞0.05）.

Conclusions

Differences in the oropharyngeal airway dimension were not statistically significant between the two groups.The dimension of the oropharyngeal airway was affected by the lengths of maxilla and mandible， and tend to increase with maxilla and mandible lengths.

Key words: Sagittal skeletal pattern, Oropharyngeal airway, Cone-beam computed tomography

Xiao-bei HU, Li-ping WU, Li-xiang MAI, Mu CHEN, Da-wei WANG. Evaluation of oropharyngeal airway in adolescence with Class Ⅰand Class Ⅱsagittal skeletal patterns on cone-beam computed tomography images[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2011, 5(02): 184-191.

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Figures/Tables 8

References 17

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矢状骨面型	年龄（岁）	ANB（°）	GoGn-SN（°）
Ⅰ类	13.06±1.63	2.83±1.15	32.57±2.48
Ⅱ类	12.80±1.36	6.71±1.47	33.52±2.01
t	0.527	-8.984	-1.294
P	0.601	＜0.001	0.204

矢状骨面型	年龄（岁）	ANB（°）	GoGn-SN（°）
Ⅰ类	13.06±1.63	2.83±1.15	32.57±2.48
Ⅱ类	12.80±1.36	6.71±1.47	33.52±2.01
t	0.527	-8.984	-1.294
P	0.601	＜0.001	0.204

矢状骨面型	Uop平面			Mop平面
矢状骨面型	横径（mm）	矢状径（mm）	截面积（mm²）	横径（mm）	矢状径（mm）	截面积（mm²）
Ⅰ类	32.03±4.42	24.91±4.05	492.79±147.32	28.19±6.20	17.11±4.47	286.67±111.65
Ⅱ类	31.64±4.30	24.41±4.32	479.96±151.71	26.41±6.04	15.65±3.46	241.94±97.66
t	0.281	0.348	0.264	0.834	1.082	1.228
P	0.780	0.730	0.793	0.411	0.290	0.229
Lop平面			气道长度			气道容积
横径（mm）	矢状径（mm）	截面积（mm²）	RP（mm）	RG（mm）	OPA（mm）	RP（ml）	RG（ml）	OPA（ml）
31.61±3.61	15.21±3.72	330.33±117.91	24.31±1.93	24.32±4.98	48.33±5.63	6.42±2.25	3.07±1.17	9.88±3.19
30.80±3.49	13.64±3.06	297.49±108.72	23.99±2.03	22.34±4.12	47.32±4.46	5.79±1.96	2.58±0.92	8.36±2.54
0.681	1.411	0.881	0.491	1.338	0.621	0.708	1.385	1.665
0.500	0.167	0.384	0.626	0.189	0.538	0.485	0.175	0.111

矢状骨面型	Uop平面			Mop平面
矢状骨面型	横径（mm）	矢状径（mm）	截面积（mm²）	横径（mm）	矢状径（mm）	截面积（mm²）
Ⅰ类	32.03±4.42	24.91±4.05	492.79±147.32	28.19±6.20	17.11±4.47	286.67±111.65
Ⅱ类	31.64±4.30	24.41±4.32	479.96±151.71	26.41±6.04	15.65±3.46	241.94±97.66
t	0.281	0.348	0.264	0.834	1.082	1.228
P	0.780	0.730	0.793	0.411	0.290	0.229
Lop平面			气道长度			气道容积
横径（mm）	矢状径（mm）	截面积（mm²）	RP（mm）	RG（mm）	OPA（mm）	RP（ml）	RG（ml）	OPA（ml）
31.61±3.61	15.21±3.72	330.33±117.91	24.31±1.93	24.32±4.98	48.33±5.63	6.42±2.25	3.07±1.17	9.88±3.19
30.80±3.49	13.64±3.06	297.49±108.72	23.99±2.03	22.34±4.12	47.32±4.46	5.79±1.96	2.58±0.92	8.36±2.54
0.681	1.411	0.881	0.491	1.338	0.621	0.708	1.385	1.665
0.500	0.167	0.384	0.626	0.189	0.538	0.485	0.175	0.111

测量项目	ANB	ANS-PNS	NA-PA	FH-NP	Go-Me	Ar-Gn
Uop平面截面积	0.094	0.183	0.114	0.074	0.403^a	0.414^a
Mop平面截面积	0.181	0.375^a	0.139	0.153	0.373^a	0.390^a
Lop平面截面积	0.046	0.409^a	-0.027	0.255	0.435^b	0.468^b
RP气道容积	0.051	0.392^a	0.031	0.095	0.530^c	0.490^b
RG气道容积	-0.143	0.420^b	-0.214	0.300	0.575^c	0.707^c
OPA容积	-0.020	0.434^b	-0.062	0.188	0.570^c	0.614^c

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