Table 2.

Descriptive statistics of pretreatment (T0), post-treatment (T1) and treatment variations (T0-T1).

	Damon Q			Invisalign®			Significance between
	T0①	T1②	T0-T1③	T0④	T1⑤	T0-T1⑥	①④	②⑤		③⑥
SNA (°)	82.00 ± 3.64	81.49 ± 3.60	0.51 ± 0.81	82.94 ± 2.88	82.39 ± 2.53	0.55 ± 2.07	0.15*		0.29		0.84*
SNB (°)	76.59 ± 3.32	76.36 ± 3.37	0.23 ± 0.91	78.79 ± 4.71	77.38 ± 3.26	1.41 ± 3.20	0.08		0.24		0.19*
ANB (°)	5.41 ± 2.05	5.17 ± 1.95	0.24 ± 0.84	4.91 ± 2.04	5.02 ± 1.76	−0.10 ± 1.87	0.97*		0.76		0.33*
MP-SN (°)	35.77 ± 7.11	35.89 ± 7.09	−0.12 ± 2.00	37.33 ± 8.82	36.71 ± 7.08	0.62 ± 5.36	0.69*		0.66		0.96*
Y-axis (°)	72.13 ± 3.83	71.96 ± 5.33	0.17 ± 3.11	72.82 ± 5.63	73.00 ± 4.40	−0.18 ± 2.91	0.78*		0.97*		0.97*
MP-FH (°)	29.87 ± 7.54	30.02 ± 7.68	−0.15 ± 4.21	32.64 ± 9.53	30.77 ± 8.82	1.87 ± 8.16	0.32*		0.73		0.99*
U1-NA (°)	32.29 ± 5.03	15.92 ± 6.25	16.38 ± 5.22	34.76 ± 7.51	14.26 ± 6.12	20.50 ± 7.88	0.25		0.31		0.03
U1-NA (mm)	8.10 ± 1.80	2.50 ± 2.26	5.59 ± 2.28	9.19 ± 2.51	2.47 ± 2.23	6.72 ± 2.41	0.06		0.96*		0.13*
U1R-NA (mm)	4.21 ± 1.59	3.85 ± 1.50	−0.35 ± 1.35	4.14 ± 2.40	3.21 ± 1.90	−0.98 ± 2.01	0.96		0.15		0.16
U1-SN (°)	114.29 ± 5.38	97.44 ± 6.35	16.85 ± 5.23	117.68 ± 8.11	96.66 ± 6.82	21.02 ± 8.62	0.07		0.65		0.04
Maxillary Lip to E-plane (mm)	1.95 ± 2.23	-0.70 ± 2.61	2.02 ± 1.51	2.04 ± 2.64	-0.32 ± 1.68	2.36 ± 2.11	0.88		0.66		0.47

There was no significant difference between two groups in skeletal, dental and soft tissue parameters in pretreatment (T0). More lingual crown inclinations were obtained in Invisalign^® group compared to Damon Q group (P ≤ .04) when evaluating angular variations of U1-NA (°) and U1-SN (°). Linear retractions of the maxillary incisors and upper lip positions for both groups showed no significance (P ≥ .13).

^*Independent t test and Mann–Whitney U test were used.