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Table 2 Changes in maxillary measurements in SME and RME groups

From: Dimensional changes of upper airway after slow vs rapid miniscrew-supported maxillary expansion in adolescents: a cone-beam computed tomography study

 

SME (n = 10)

RME (n = 10)

SME vs RME

T1

T2

T2-T1

p value†

T1

T2

T2-T1

p value†

Mean Difference

95% CI

Lower, upper

p value‡

Mean (SD)

Mean (SD)

Mean change (SD)

Mean (SD)

Mean (SD)

Mean change

(SD)

Inter-molar width, mm

41.83 (3.94)

46.32 (3.64)

4.49 (1.72)

< 0.001*

40.85 (3.33)

47.78 (2.89)

6.94 (1.32)

< 0.001*

−2.44

−3.88, −1.00

0.002*

External maxillary width, mm

59.10 (3.75)

62.34 (3.56)

3.24 (1.13)

< 0.001*

58.46 (1.96)

62.11 (1.97)

3.65 (1.65)

< 0.001*

−0.41

−1.74, 0.92

0.53

Palatal width, mm

23.05 (2.04)

27.71 (2.06)

4.66 (1.33)

< 0.001*

23.50 (4.24)

27.72 (3.96)

4.22 (1.87)

< 0.001*

0.44

−1.08, 1.97

0.55

  1. CI Confidence interval, SD Standard deviation, SME Slow maxillary expansion, RME Rapid maxillary expansion, T1 Pre-expansion, T2 5 months post-expansion
  2. *Statistically significant at p value < 0.05
  3. †Groups are compared using paired samples t-test
  4. ‡ Values are compared using independent samples t-test