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Table 1 Characteristics of RME and MME sample groups

From: Comparison between rapid and mixed maxillary expansion through an assessment of arch changes on dental casts

  Expansion Retention Total treatment duration
  Phase Turns Duration Controls   
RME group One: rapid 2/day 1–3 weeks 4/months 8 months ± 2 1.2 year ± 0.3
MME group First: very rapid 4–2–1/day 1 h 2/months 8 months ± 2 1.3 year ± 0.2
Second: slow 2/week 4–6 months