Progress in Orthodontics

Table 2 Descriptive statistics for bracket’s slot measurements divided by group and bracket type

From: Dimensional variability of orthodontic slots and archwires: an analysis of torque expression and clinical implications

	Group 1			Group 2			Group 3
	UR1	UR3	UR4	UR1	UR3	UR4	UR1	UR3	UR4
Slot height	0.0233 ± 0.0006	0.0229 ± 0.0003	0.0232 ± 0.0003	0.0224 ± 0.0003	0.0223 ± 0.0004	0.0227 ± 0.0003	0.0222 ± 0.0003	0.0227 ± 0.0004	0.0223 ± 0.0004
Maximum slot depth	0.0421 ± 0.0007	0.0351 ± 0.0012	0.0376 ± 0.0012	0.0345 ± 0.0003	0.0300 ± 0.0001	0.0340 ± 0.0030	0.0299 ± 0.0010	0.0332 ± 0.0027	0.0246 ± 0.0002
Minimum slot depth	0.0343 ± 0.0010	0.0337 ± 0.0009	0.0349 ± 0.0008	0.0286 ± 0.0004	0.0279 ± 0.0003	0.0283 ± 0.0009	0.0253 ± 0.0011	0.0294 ± 0.0024	0.0219 ± 0.0014

Mean ± SD; values are expressed in inch
Group 1 Astar Orthodontics, Group 2 SIA, Group 3 Sweden & Martina, UR1 upper right central incisor bracket, UR3 upper right canine bracket, UR4 upper right first premolar bracket

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