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. 2023 Feb 27;24:6. doi: 10.1186/s40510-023-00458-3

Table 2.

Baseline characteristics comparison (T0-T0) of the two studied groups

			Fixed appliances (Mean ± SD)	Clear aligners (Mean ± SD)	p value
Bone thickness
Central	Labial	S1	0.87 ± 0.39	0.84 ± 0.36	0.488^b
		S2	1.10 ± 0.40	0.89 ± 0.37	0.147^b
		S3	1.07 ± 0.64	1.00 ± 0.31	0.806^b
		Average	1.07 ± 0.50	0.94 ± 0.35	0.048^b
	Palatal	S1	1.65 ± 0.68	1.51 ± 0.52	0.855^a
		S2	3.25 ± 1.07	3.00 ± 1.14	0.154^b
		S3	4.73 ± 1.69	4.64 ± 1.86	0.122^b
		Average	3.23 ± 1.74	3.05 ± 1.82	0.224^b
	Total		2.15 ± 1.68	1.99 ± 1.68	0.209^b
Lateral	Labial	S1	0.79 ± 0.54	0.85 ± 0.53	0.340^b
		S2	0.94 ± 0.48	0.84 ± 0.58	0.287^b
		S3	0.81 ± 0.51	0.73 ± 0.65	0.306^b
		Average	0.84 ± 0.51	0.80 ± 0.58	0.740^b
	Palatal	S1	1.34 ± 0.54	1.23 ± 0.55	0.430^a
		S2	2.38 ± 0.88	2.37 ± 1.12	0.513^b
		S3	3.97 ± 1.76	3.76 ± 1.34	0.468^b
		Average	2.51 ± 1.38	2.45 ± 1.48	0.712^b
	Total		1.67 ± 1.33	1.63 ± 1.39	0.787^b
Bone height
Central incisors	Labial		2.02 ± 0.59	2.10 ± 0.55	0.397^b
Central incisors	Palatal		1.47 ± 0.66	1.60 ± 0.51	0.083^b
Lateral incisors	Labial		2.56 ± 1.43	2.84 ± 1.81	0.634^b
Lateral incisors	Palatal		1.71 ± 0.60	1.99 ± 1.53	0.473^b
Root Resorption
Central incisors			11.82 ± 1.68	12.14 ± 1.67	0.268^b
Lateral incisors			12.50 ± 1.36	12.72 ± 1.24	0.356^b
Inclination
UI-PP			118.24 ± 6.65	117.63 ± 7.10	0.783^a

a: Independent sample t test, b: Mann–Whitney U test