Predictability of orthodontic tooth movement with aligners: effect of treatment design

Progress in Orthodontics

Table 2 Distribution of attachments stratified for group of teeth

	Absence of attachments		Conventional attachments		Optimized attachments
	Proportion	95% confidence interval	Proportion	95% confidence interval	Proportion	95% confidence interval
Maxilla
Central incisors	0.66	0.63 to 0.69	0.01	0.003 to 0.01	0.33	0.30 to 0.36
Lateral incisors	0.29	0.26 to 0.32	0.10	0.08 to 0.12	0.61	0.58 to 0.64
Canines	0.13	0.11 to 0.15	0.16	0.14 to 0.19	0.71	0.68 to 0.74
Premolars	0.18	0.16 to 0.20	0.15	0.14 to 0.17	0.67	0.64 to 0.69
First molars	0.25	0.23 to 0.28	0.55	0.52 to 0.58	0.19	0.17 to 0.22
Second molars	0.60	0.57 to 0.63	0.32	0.29 to 0.35	0.08	0.06 to 0.10
Mandible
Incisors	0.83	0.81 to 0.85	0.04	0.03 to 0.05	0.13	0.12 to 0.15
Canines	0.25	0.22 to 0.28	0.05	0.04 to 0.07	0.70	0.67 to 0.73
Premolars	0.21	0.19 to 0.23	0.09	0.07 to 0.10	0.70	0.68 to 0.72
First molars	0.42	0.39 to 0.45	0.49	0.46 to 0.52	0.09	0.08 to 0.12
Second molars	0.63	0.60 to 0.66	0.27	0.24 to 0.29	0.10	0.08 to 0.12