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Table 1 RME and MME activation and retention procedure

From: Comparison between rapid and mixed maxillary expansion through an assessment of dento-skeletal effects on posteroanterior cephalometry

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