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Progress in Orthodontics

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

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