The morphological relationship between upper airway and chin in ClassⅠ malocclusion

doi:10.3877/cma.j.issn.1674-1366.2019.04.007

Abstract

Abstract:

Objective

To investigate the morphological relationship between the upper airway and chin by cone-beam computed tomography (CBCT) , and explore the effect of chin on the morphology of upper airway.

Methods

All 18 adults with skeletal ClassⅠ malocclusion in Department of Orthodontics, Dalian Stomatology Hospital were chosen from 2017 to 2018. MIMICS 20.0 software was used to measure the upper airway morphology and Winceph 8.0 software was used to measure the chin morphology. SPSS 20.0 was used for statistical analysis, and a value of P<0.05 was considered statistically different.

Results

The length of the glossopharynx was positively correlated with the front chin thickness and protrusion (r_{front chin thickness} = 0.573, P_{front chin thickness} = 0.013; r_{chin protrusion} = 0.647, P_{chin protrusion} = 0.004) , and negatively correlated with chin angle (r = -0.476, P = 0.046) . The transverse diameter of the glossopharynx was positively correlated with the front chin thickness and protrusion (r_{front chin thickness} = 0.477, P_{front chin thickness} = 0.045; r_{chin protrusion} = 0.559, P_{chin protrusion} = 0.016) . The volume of the glossopharynx was positively correlated with the front chin thickness and protrusion (r_{front chin thickness} = 0.496, P_{front chin thickness} = 0.036; r_{chin protrusion} = 0.681, P_{chin protrusion} = 0.002) , and negatively correlated with chin angle (r = -0.556, P = 0.017) . The total height and volume were positively correlated with the chin protrusion (r_{total height} = 0.531, P_{total height} = 0.005; r_{total volume} = 0.469, P_{total volume} = 0.023) .

Conclusion

The more protrusion of the chin, the more enlarged glossopharynx in ClassⅠ malocclusion.

Key words: Malocclusion, Chin, Upper airway morphology, Skeletal ClassⅠ

Zhenmei Yan, Donglan Mei, Lichi Han, Huayan Zhang. The morphological relationship between upper airway and chin in ClassⅠ malocclusion[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2019, 13(04): 230-234.

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Figures/Tables 8

References 20

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测量项目	H1		LAT1		AP1		R1		CAS1		VOL1
测量项目	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值
颏前厚度	-0.176	0.486	-0.120	0.636	0.077	0.761	-0.201	0.424	0.074	0.772	-0.002	0.993
颏角	0.525	0.055	-0.041	0.872	0.255	0.308	-0.379	0.120	-0.048	0.879	0.414	0.088
颏曲度	-0.025	0.920	0.143	0.571	-0.135	0.594	0.265	0.278	-0.163	0.518	-0.247	0.322
颏凸度	-0.501	0.054	0.071	0.780	-0.115	0.650	0.232	0.353	0.095	0.706	-0.303	0.222

测量项目	H1		LAT1		AP1		R1		CAS1		VOL1
测量项目	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值
颏前厚度	-0.176	0.486	-0.120	0.636	0.077	0.761	-0.201	0.424	0.074	0.772	-0.002	0.993
颏角	0.525	0.055	-0.041	0.872	0.255	0.308	-0.379	0.120	-0.048	0.879	0.414	0.088
颏曲度	-0.025	0.920	0.143	0.571	-0.135	0.594	0.265	0.278	-0.163	0.518	-0.247	0.322
颏凸度	-0.501	0.054	0.071	0.780	-0.115	0.650	0.232	0.353	0.095	0.706	-0.303	0.222

测量项目	H2		LAT2		AP2		R2		CAS2		VOL2
测量项目	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值
颏前厚度	0.150	0.554	0.152	0.547	0.235	0.347	0.009	0.972	0.258	0.301	0.178	0.479
颏角	-0.154	0.543	-0.108	0.671	-0.134	0.595	0.079	0.755	-0.299	0.229	-0.304	0.219
颏曲度	0.035	0.890	-0.043	0.867	-0.093	0.713	-0.015	0.951	-0.094	0.704	-0.058	0.819
颏凸度	0.280	0.261	0.227	0.365	0.227	0.365	0.002	0.994	0.389	0.111	0.373	0.127

测量项目	H2		LAT2		AP2		R2		CAS2		VOL2
测量项目	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值
颏前厚度	0.150	0.554	0.152	0.547	0.235	0.347	0.009	0.972	0.258	0.301	0.178	0.479
颏角	-0.154	0.543	-0.108	0.671	-0.134	0.595	0.079	0.755	-0.299	0.229	-0.304	0.219
颏曲度	0.035	0.890	-0.043	0.867	-0.093	0.713	-0.015	0.951	-0.094	0.704	-0.058	0.819
颏凸度	0.280	0.261	0.227	0.365	0.227	0.365	0.002	0.994	0.389	0.111	0.373	0.127

测量项目	H3		LAT3		AP3		R3		CAS3		VOL3
测量项目	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值	r值	P值
颏前厚度	0.573^a	0.013	0.477^a	0.045	0.246	0.325	0.144	0.569	0.162	0.562	0.496^a	0.036
颏角	-0.476^a	0.046	-0.387	0.113	-0.218	0.385	-0.088	0.728	-0.389	0.111	-0.556^a	0.017
颏曲度	-0.180	0.475	-0.056	0.826	-0.081	0.749	0.026	0.919	-0.042	0.828	-0.167	0.508
颏凸度	0.647^a	0.004	0.559^a	0.016	0.223	0.374	0.234	0.349	0.373	0.127	0.681^a	0.002

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