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Table 2 Results for lateral displacement of ANS and PNS and width of opening in pterygoid processes

From: Changes in the midpalatal and pterygopalatine sutures induced by micro-implant-supported skeletal expander, analyzed with a novel 3D method based on CBCT imaging

  Before expansion After expansion Treatment change P value
Mean sd Mean sd Mean sd
1 Rt ANS to maxillary sagittal plane 0.00 0.00 2.59 1.70 2.59 1.70 < .0001 **
2 Lt ANS to maxillary sagittal plane 0.00 0.00 2.16 1.27 2.16 1.27 < .0001 **
3 Rt PNS to maxillary sagittal plane 0.00 0.00 2.34 1.32 2.34 1.32 < .0001 **
4 Lt PNS to maxillary sagittal plane 0.00 0.00 1.99 0.90 1.99 0.90 < .0001 **
5 Lateral displacement of Rt ANS + Lt ANS 0.00 0.00 4.75 2.59 4.75 2.59 < .0001 **
6 Lateral displacement of Rt PNS + Lt PNS 0.00 0.00 4.33 1.74 4.33 1.74 < .0001 **
7 Width of opening in Rt pterygoid process 0.00 0.00 1.35 1.79 1.35 1.79 0.011 *
8 Width of opening in Lt pterygoid process 0.00 0.00 2.17 2.45 2.17 2.45 0.004 **
  1. All measures are expressed in mm
  2. Rt ANS right half of anterior nasal spine, Lt ANS left half of anterior nasal spine, Rt PNS right half of posterior nasal spine, Lt PNS left half of posterior nasal spine, Rt right, Lt left
  3. *P < .05; **P < .01