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Table 2 Amount of rRR between SL and Non-SL (tooth level)

From: Root resorption, treatment time and extraction rate during orthodontic treatment with self-ligating and conventional brackets

  SL (n = 1112) Non-SL (n = 592) Total (n = 1704)
  Mean ± SD Mean ± SD Mean ± SD
rRR (%) 3.0 ± 5.6 4.5 ± 6.6 3.5 ± 6.0
  1. SL: self-ligating, SD: standard deviation, rRR: relative root resorption.