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Table 2 Characteristics of included studies

From: Effect of non-surgical maxillary expansion on the nasal septum deviation: a systematic review

Study

Baseline characteristics of treatment group

Baseline characteristics of control group

RME protocol

Measurement of the nasal septum

Results

Farronato et al. [15]

N = 100 Ages 5–9 years (mean = 7.62 years, SD = 0.7) Nasal septal deviation (NSD) of more than 1 mm as seen on PA radiographs (amplitude of deviation)

N = 40 Ages 5–9 years (mean = 7.62, SD = 0.7)

Not treated with RME Not clear if they presented with NSD

Hyrax expander

1 turn (0.25 mm) twice a day for 15 days

Amplitude of NSD measured on frontal/PA cephalograms as millimeter distance between midline axis of symmetry and deviated nasal septum.

Measurements taken before appliance insertion (T0), at appliance removal (T1) and 6 months after appliance removal (T2)

94 % reduction in amplitude of NSD from RME in the middle and lower third of the nasal cavity from T0 to T2

Altug-Atac et al. [21]

N = 10 Ages 13–17 years

(mean = 15 years)

Nasal septal angle (from midsagittal plane = 1.05° (SD = 0.91))

N = 10 Ages 13–17 years (mean = 15 years)

Not treated with RME Nasal septal angle 0.78 (SD = 1.23)

Occlusal coverage, Hyrax type expander with 2 turns a day for 2–3 weeks

Measured in degrees as angle between the nasal septum midsagittal plane on frontal/PA cephalograms. Measurements taken prior to appliance insertion and after 12 weeks active expansion

No significant positional change in nasal septum from RME