Table 2.

Comparison of the pre- and post-treatment measurements among the three groups*

Variable	Class I malocclusion group (n=30)				Class II malocclusion group (n=30)				Class III malocclusion group (n=30)
	Mean±SD		P*	95% CI	Mean±SD		P*	95% CI	Mean±SD		P*	95% CI
	Pretreatment	Posttreatment			Pretreatment	Posttreatment			Pretreatment	Posttreatment
Interlabial gap	8.603±3.05	10.677±4.82	0.053	−0.01-4.23	8.165±3.36	10.303±4.21	0.033	0.16-4.32	8.087±3.26	9.107±2.49	0.178	−0.43-2.46
Upper incisor exposure	7.823±4.53	8.607±4.27	0.493	−1.34-3.05	8.503±3.19	10.369±3.88	0.046	0.03-3.74	7.103±2.06	8.370±3.43	0.155	−0.18-2.63
Smile width	56.690±7.01	57.045±6.88	0.843	−3.32-3.65	55.107±4.31	57.783±5.86	0.048	0.03-5.23	54.871±6.14	55.561±6.89	0.683	−2.65-4.03
Smile index	6.099±3.95	7.093±4.22	0.079	−1.11-3.21	5.253±2.24	6.150±2.96	0.191	−0.48-2.34	6.368±5.12	5.668±3.31	0.531	−1.53-2.92
Buccal corridor- right	5.657±1.94	5.060±1.94	0.200	−0.42-1.76	5.333±2.26	4.873±2.17	0.424	−0.64-1.63	4.634±2.15	4.617±2.74	0.978	−1.25-1.29
Buccal corridor-left	6.097±1.97	5.832±1.28	0.539	−0. 52-1.31	5.577±2.22	5.584±2.12	0.081	−1.31-1.27	5.686±3.11	5.445±2.43	0.739	−1.20-1.68
Gingival display	−0.657±0.15	−0.592±0.28	0.267	−0.05-0.17	−0.729±0.32	−0.543±0.27	0.018	0.02-0.33	−0.639±0.34	−0.497±0.28	0.088	−0.02-0.30

*: P< 0.05 All measures are presented in mm. CI: Confidence interval; SD: Standard deviation