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Table 3 Maxillary first molar rotational change at 6 months of canine retraction using miniscrews for direct anchorage

From: Evaluation of maxillary first molar rotation during direct miniscrew-supported maxillary canine retraction: a before-and-after study

  N Mean SD SEM Mean difference SD SED t df P value
Pre-retraction 20 77.3910 6.7287 1.5046 1.8945 0.6 1.257 1.5067 19 0.1483
Post-retraction 20 79.2855 5.9197 1.3237
  1. N: Sample size, SD: standard deviation, SED: standard error of difference