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Table 3 Mean prescription and mean imprecision values

From: Predictability of orthodontic movement with orthodontic aligners: a retrospective study

  N Mean prescription(°) SD Mean imprecision(°) SD Median IQR Significance.
Upper arch
 VL tip Incisors 57 9.2 6.7 4.5 4.0 3.4 −  0.6 NS
Canines 29 5.1 3.2 2.5 1.5 2.3 0.8 NS
Premolars 53 5.1 3.4 3.1 2.6 2.1 − 0.5 NS
Molars 37 3.9 1.4 2.9 2.2 2.5 0.3 NS
 MD tip Incisors 57 6.4 4.5 3.2 2.6 2.5 − 0.1 NS
Canines 29 4.7 2.8 2.8 2.2 2.6 0.4 NS
Premolars 53 4.6 3.3 3.6 2.3 3.9 1.6 NS
Molars 37 4.5 1.6 3.4 2.3 3.4 1.1 NS
 Rot. Incisors 57 10.8 9.3 5.0 5.3 3.7 − 1.6 NS
Canines 29 6.5 4.6 4.3 2.8 3.6 0.8 NS
Premolars 53 7.0 6.7 3.5 3.1 2.9 − 0.2 NS
Molars 37 7.2 4.8 4.8 4.6 4.4 − 0.2 NS
Lower arch
 VL tip Incisors 64 5.9 2.1 2.9 2.6 2.3 − 0.3 NS
Canines 30 7.2 5.0 3.5 2.8 3.1 0.3 NS
Premolars 52 6.2 4.1 3.2 2.2 2.9 0.7 NS
Molars 23 3.9 1.7 1.3 .9 1.9 1.0 NS
 MD tip Incisors 64 4.2 1.5 2.7 1.9 2.2 0.3 NS
Canines 30 4.8 2.0 3.3 2.2 2.9 0.6 NS
Premolars 52 5.4 4.7 3.4 2.6 3.1 0.5 NS
Molars 23 6.3 3.7 4.3 3.0 3.5 0.5 NS
 Rot. Incisors 64 7.2 4.4 3.4 2.5 2.8 0.3 *
Canines 30 12.4 10.0 6.9 5.4 5.5 0.1 *
Premolars 52 7.3 6.0 5.4 5.8 3.7 − 2.1 NS
Molars 23 4.6 2.8 2.0 1.8 1.4 − 0.4 *
  1. VL tip vestibulolingual tip, MD tip mesiodistal tip, Rot. rotation, SD standard deviation, IQR interquartile range, NS not significant
  2. *p < 0.05