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Table 1 Descriptive Data of the Treatment Groups and Intergroup Comparison

From: Success and complication rate of miniscrew assisted non-surgical palatal expansion in adults - a consecutive study using a novel force-controlled polycyclic activation protocol

 

MAPE

group

SARPE

group

P-Value

 

N = 27 (84.4%)

N = 5 (15.6%)

 

Age (years)

26.8 ± 8.2

41.3 ± 9.9

=0.005*

Age range (years)

18 - 49

31 - 58

 

Age group (18-30) (n)

21

0

 

Age group (30-40) (n)

4

3

 

Age group (40-60) (n)

2

2

 

Gender (Female/Male) (n)

19/8

3/2

=1

Expansion (anterior) (mm)

5.4 ± 1.5

6.3 ± 3.0

<0.0001*

Expansion (posterior) (mm)

2.5 ± 1.1

4.0 ± 2.1

=0.125

Screw expansion (mm)

6.4 ± 1.9

5.9 ± 0.9

=0.91

Duration of expansion (days)

81.2 ± 31.0

85.4 ± 75.5

=0.499

Retention (days)

298.9 ± 142.7

325.0 ± 230.5

=0.775

  1. MAPE: successful non-surgical expansion using the MICRO-4 appliance; SARPE: failed non-surgical expansion using the MICRO-4 appliance; *Statistically significant for intergroup comparison (P < 0.05)