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Table 2 Comparison of cephalometric changes before (T1) and after treatment (T2)

From: Maxillary protraction using a hybrid hyrax-facemask combination

  T1 T2 T2-T1 P value
  Mean SD Mean SD Mean SD  
Angular measurements (deg)
SNA 79.8 4.8 81.8 5.0 2.0 2.0 <0.001a
SNB 80.7 4.2 79.5 4.7 -1.2 2.3 <0.05a
ANB -0.9 2.3 2.3 3.2 3.2 1.9 <0.001a
ML-NL 27.3 5.3 28.0 7.1 0.7 3.3 0.440a
U1-NL 107.5 10.6 107.3 7.8 -0.2 7.9 0.911a
Linear measurements (mm)
WITS -4.8 2.1 -0.7 2.2 4.1 2.1 <0.001a
Overbite 0.3 2.6 0.1 1.4 -0.2 2.2 0.783a
Overjet -0.2 2.2 2.5 1.5 2.7 2.5 <0.001a
U6-A point 24.4 2.6 24.0 2.7 -0.4 1.0 0.134b
  1. aPaired t test; bWilcoxon test.