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Table 1 Comparison of cephalometric measurements and pharyngeal airway measurements between tooth-borne face mask (TBFM) and skeletal anchored face mask (SAFM) patients before treatment. Normal range of pharyngeal airway measurement were not included

From: Comparison of the effects on the pharyngeal airway space of maxillary protraction appliances according to the methods of anchorage

  Normal data TBFM SAFM P
Mean SD Mean SD Mean SD
SNA 81.80 2.82 79.33 2.94 79.53 3.23 0.156
SNB 77.00 2.82 81.02 3.22 80.78 2.96 0.630
N. per. to A 0.40 2.30 −3.02 2.14 −4.37 2.54 0.190
Palatal P. 1.20 4.72 0.74 2.32 0.45 2.42 0.561
Co-A 91.00 4.30 82.61 3.96 81.95 4.32 0.854
Mn. length 113.12 3.62 112.21 4.51 114.19 4.83 0.259
ANB 3.00 1.82 −1.22 1.89 −2.22 2.15 0.094
U1 to SN 105.82 5.82 108.18 8.49 109.09 7.41 0.837
FMA 25.00 2.00 27.91 2.81 27.82 5.24 0.912
IMPA 88.00 2.00 87.72 6.73 85.32 5.51 0.176
SPPS   11.46 2.20 11.72 2.26 0.680
MPS 12.26 3.35 13.12 2.68 0.323
IPS 12.56 2.17 11.74 3.26 0.232
SPPA 248.32 52.59 265.14 58.84 0.287
MPA 190.70 23.61 198.70 42.82 0.406
IPA 298.22 60.32 371.97 74.43 0.445
  1. Independent t test, P < 0.05
  2. SD standard deviation