Comparison of mandibular cross-sectional morphology between Class I and Class II subjects with different vertical patterns: based on CBCT images and statistical shape analysis

Chen, Haotian; Liu, Zijin; Hu, Xinnong; Wu, Ben; Gu, Yan

doi:10.1186/s12903-021-01591-3

Table 4 Comparison of mandibular morphology in females

From: Comparison of mandibular cross-sectional morphology between Class I and Class II subjects with different vertical patterns: based on CBCT images and statistical shape analysis

Index (Mean ± SD (mm))	Mandibular height					Upper third of mandibular width					Lower third of mandibular width
Index (Mean ± SD (mm))	11H	23H	45H	67H	Comparison among regions	11 W-U1/3	23 W-U1/3	45 W-U1/3	67 W-U1/3	Comparison among regions	11 W-L1/3	23 W-L1/3	45 W-L1/3	67 W-L1/3	Comparison among regions
Class I normodivergent	31.30 ± 1.91	31.22 ± 1.74	30.09 ± 1.72	26.79 ± 1.68	11 = 23 = 45, 45 > 67***	7.86 ± 1.24	8.33 ± 1.31	10.66 ± 1.38	14.91 ± 1.66	11 = 23, 23 < 45*, 45 < 67*	13.35 ± 1.62	10.56 ± 1.27	10.60 ± 1.31	12.65 ± 1.16	11 > 23*, 23 = 45, 45 < 67*, 11 = 67
Class I hyperdivergent	33.24 ± 3.04	33.27 ± 2.86	32.14 ± 2.56	27.49 ± 2.12	11 = 23 = 45, 45 > 67***	6.92 ± 1.13	7.48 ± 1.23	10.21 ± 1.42	14.25 ± 1.37	11 = 23, 23 < 45*, 45 < 67*	12.69 ± 1.14	9.77 ± 1.01	10.59 ± 1.28	12.68 ± 1.40	11 > 23*, 23 = 45, 45 < 67*, 11 = 67
Class I hypodivergent	29.63 ± 2.58	29.64 ± 2.21	28.85 ± 2.30	27.58 ± 2.31	11 = 23 = 45 = 67	8.93 ± 1.55	9.40 ± 1.39	11.54 ± 1.61	15.44 ± 1.45	11 = 23, 23 < 45*, 45 < 67*	13.86 ± 1.49	11.02 ± 1.59	10.42 ± 1.48	12.93 ± 1.42	11 > 23*, 23 = 45, 45 < 67*, 11 = 67
Class II normodivergent	32.52 ± 2.71	31.78 ± 2.43	30.91 ± 2.39	28.23 ± 2.20	11 = 23 = 45, 45 > 67***	7.82 ± 1.28	8.58 ± 1.30	10.94 ± 1.33	15.11 ± 1.47	11 = 23, 23 < 45*, 45 < 67*	12.78 ± 1.65	10.64 ± 1.24	10.69 ± 1.25	12.82 ± 1.28	11 > 23*, 23 = 45, 45 < 67*, 11 = 67
Class II hyperdivergent	34.22 ± 2.64	33.38 ± 2.69	31.30 ± 2.45	26.84 ± 2.27	11 = 23, 23 > 45*, 45 > 67*	6.55 ± 1.34	7.06 ± 1.57	9.91 ± 1.48	14.19 ± 1.86	11 = 23, 23 < 45*, 45 < 67*	11.71 ± 1.65	9.51 ± 1.52	10.38 ± 1.34	12.03 ± 1.50	11 > 23**, 23 = 45, 45 < 67, 11 = 67
Class II hypodivergent	30.16 ± 1.63	29.32 ± 1.47	28.37 ± 1.45	26.99 ± 2.01	11 = 23 = 45 = 67	9.50 ± 1.41	9.98 ± 1.49	12.06 ± 1.83	15.47 ± 1.85	11 = 23 = 45, 45 < 67***	14.29 ± 2.23	11.49 ± 1.94	10.77 ± 1.94	12.85 ± 1.71	11 > 23**, 23 = 45 = 67
Comparison among different vertical groups	1L < 1A, 1L < 1H, 1A < 1H, 2L < 2A, 2L < 2H, 2A < 2H	1L < 1A, 1L < 1H, 1A < 1H, 2L < 2A, 2L < 2H*, 2A < 2H	1L < 1A, 1L < 1H, 1A < 1H, 2L < 2A, 2L < 2H*,	, 2H < 2A**		1L > 1A, 1L > 1H, 1A > 1H, 2L > 2A, 2L > 2H, 2A > 2H**	1L > 1A, 1L > 1H, 1A > 1H, 2L > 2A, 2L > 2H, 2A > 2H**	1L > 1A, 1L > 1H*, 2L > 2A, 2L > 2H*, 2A > 2H	1L > 1H*, 2L > 2H, 2A > 2H*		1L > 1H, 2L > 2A, 2L > 2H*, 2A > 2H	1L > 1H**, 1A > 1H, 2L > 2H, 2A > 2H	NS	2A > 2H*
Comparison between different sagittal groups	1A < 2A*, 1L = 2L 1H = 2H	1A = 2A 1L = 2L 1H = 2H	1A = 2A, 1L = 2L, 1H = 2H	1A < 2A**, 1L = 2L, 1H = 2H		1A = 2A, 1L = 2L, 1H = 2H	1A = 2A, 1L = 2L, 1H = 2H	1A = 2A, 1L = 2L, 1H = 2H	1A = 2A, 1L = 2L, 1H = 2H		1A = 2A, 1L = 2L, 1H > 2H*	1A = 2A, 1L = 2L, 1H = 2H	1A = 2A, 1L = 2L, 1H = 2H	1A = 2A, 1L = 2L, 1H = 2H

1A: Class I normodivergent group; 1L: Class I hypodivergent group; 1H: Class I hyperdivergent group;
2A: Class II normodivergent group; 2L: Class II hypodivergent group; 2H: Class II hyperdivergent group
^*P < 0.05, **P < 0.01, ***P < 0.001; NS: Not significant

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