Three-dimensional assessment of periodontal support of lower incisors for skeletal Class II malocclusion undergoing presurgical orthodontic treatment with different vertical skeletal patterns

Lyu, Hangmiao; Ma, Huimin; Wang, Xiaoxia; Xu, Li; Hou, Jianxia; Zhao, Yijiao; Li, Weiran; Li, Xiaotong

doi:10.1186/s40510-023-00495-y

Progress in Orthodontics

Table 3 Comparison of the RL and alveolar bone morphologic measurements in groups from T1 to T2

From: Three-dimensional assessment of periodontal support of lower incisors for skeletal Class II malocclusion undergoing presurgical orthodontic treatment with different vertical skeletal patterns

	Group 1			Group 2			Group 3			Comparison among groups at T1
Measurements	T1	T2	P1	T1	T2	P2	T1	T2	P3	P4	Multiple comparisons
V-LA, mm³	26.22 ± 11.89	22.13 ± 11.96	0.202	22.13 ± 6.61	32.83 ± 20.15	0.040*	30.66 ± 7.85	42.07 ± 25.51	0.076	0.037*	(3,1) > (1,2)
V-L, mm³	37.05 ± 16.68	19.72 ± 16.34	0.000**	45.09 ± 17.44	18.39 ± 14.32	0.000**	51.03 ± 16.49	18.81 ± 10.70	0.000**	0.074	–
V-W, mm³	63.27 ± 24.51	41.85 ± 20.88	0.000**	67.23 ± 21.14	51.22 ± 20.80	0.010**	81.70 ± 20.64	60.87 ± 28.72	0.002**	0.057	–
PDLA, mm²	115.73 ± 25.54	99.46 ± 25.37	0.000**	114.03 ± 14.90	92.95 ± 17.28	0.000**	120.25 ± 19.00	95.72 ± 26.79	0.000**	0.671	–
RL, mm	11.30 ± 1.49	10.07 ± 1.42	0.000**	11.18 ± 1.04	9.90 ± 0.90	0.000**	11.55 ± 1.11	10.02 ± 1.71	0.000**	0.686	–
T-ALA, mm	2.64 ± 0.74	3.49 ± 1.48	0.016*	2.57 ± 0.80	4.14 ± 2.17	0.004**	3.66 ± 1.36	6.06 ± 3.06	0.003**	0.005**	3 > (1,2)
T-AL, mm	3.06 ± 1.08	1.65 ± 1.74	0.001**	4.23 ± 1.16	2.01 ± 1.69	0.000**	4.45 ± 0.93	2.21 ± 1.07	0.000**	0.001**	3 > 2 > 1
T-AW, mm	5.70 ± 0.91	5.14 ± 1.77	0.082	6.79 ± 1.03	6.14 ± 1.71	0.057	8.11 ± 1.44	8.27 ± 2.85	0.755	0.000**	3 > 2 > 1
T-MLA, mm	0.63 ± 0.28	0.79 ± 0.56	0.28	0.68 ± 0.33	1.00 ± 0.83	0.078	0.79 ± 0.26	1.90 ± 1.08	0.001**	0.293	–
T-ML, mm	1.06 ± 0.44	0.25 ± 0.48	0.000**	1.43 ± 0.66	0.47 ± 1.03	0.003**	1.56 ± 0.40	0.15 ± 0.47	0.000**	0.023*	3 > 2 > 1
T-MW, mm	1.69 ± 0.65	1.04 ± 0.50	0.003**	2.12 ± 0.69	1.47 ± 1.22	0.042*	2.35 ± 0.50	2.05 ± 1.11	0.189	0.014*	(3,2) > (2,1)
VBL-LA, mm	2.16 ± 1.24	3.69 ± 2.64	0.021*	2.56 ± 1.63	3.46 ± 2.51	0.211	1.86 ± 0.63	2.42 ± 1.39	0.087	0.285	–
VBL-L, mm	2.37 ± 0.79	7.69 ± 3.05	0.000**	2.28 ± 0.88	6.92 ± 2.99	0.000**	2.23 ± 0.77	7.48 ± 2.44	0.000**	0.886	–
VBL-M, mm	1.93 ± 0.42	2.34 ± 0.40	0.001**	2.35 ± 0.88	2.37 ± 0.68	0.936	1.94 ± 0.62	2.39 ± 0.86	0.029*	0.13	–
VBL-D, mm	2.07 ± 0.54	2.35 ± 0.80	0.056	2.49 ± 0.85	2.42 ± 0.92	0.782	2.09 ± 0.63	2.53 ± 0.83	0.042*	0.161	–

P1, paired-samples t test for comparison between T1 and T2 in the group 1; P2, paired-samples t test for comparison between T1 and T2 in the group 2; P3, paired-samples t test for comparison between T1 and T2 in the group 3; P4, one-way ANOVA with Duncan's multiple comparison test was performed for comparisons among group 1, group 2 and group 3 at T1. Results are expressed as mean ± standard deviation
*P ≤ 0.05; **P ≤ 0.01

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