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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)