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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
  1. Mean ± SD; values are expressed in inch
  2. 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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