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Table 3 Comparison of the changes in CBCT variables between the C-group and AP-group

From: Control of anterior segment using an antero-posterior lingual sliding retraction system: a preliminary cone-beam CT study

Variables C-group (n = 18) AP-group (n = 16)  
Mean SD Mean SD p value
Three-dimensional tooth movement
 Maxillary central incisors
  U1CP ΔX − 0.16 0.74 − 0.09 0.83 .9291
  U1CP ΔY 4.02 1.07 3.81 1.44 .6515
  U1CP ΔZ 0.20 0.62 1.99 0.69 .0000***
  U1RPΔX 0.02 0.78 0.11 0.46 .7123
  U1RP ΔY 0.94 1.41 1.91 1.01 .0364*
  U1RP ΔZ 0.96 0.93 1.76 0.57 .006**
 Maxillary canines
  U3CP ΔX 0.11 0.70 0.34 1.06 .4759
  U3CP ΔY 3.80 1.11 3.70 1.23 .7913
  U3CP ΔZ 1.46 0.71 2.02 0.84 .0436**
  U3RP ΔX 0.17 0.62 0.45 0.85 .2801
  U3RP ΔY 1.12 1.42 0.87 1.30 .5976
  U3RP ΔZ 1.97 0.94 2.09 1.58 .7782
 Maxillary first molars
  U6CP ΔX − 0.78 0.93 − 0.09 1.10 .0663
  U6CP ΔY − 1.46 0.90 − 0.45 1.44 .0212*
  U6CP ΔZ − 0.65 0.55 0.99 1.05 .0000***
Occlusal plane and canine evaluation
 ΔOP-FH plane (°) 0.62 1.49 − 0.19 2.69 0.446
 ΔFH to U3 long axis (°) 5.61 3.23 3.20 2.44 0.020*
 ΔOP to U3 cusp tip (mm) 0.15 0.65 − 0.21 0.56 0.093
Alveolar bone level
 ΔVABLl 0.071 0.22 − 0.32 0.42 0.003**
 ΔVALBp 2.37 2.51 1.55 1.02 0.783
Root resorption
 ΔRL − 0.8 0.68 − 0.7 0.59 0.692
  1. Independent t test was performed
  2. SD standard deviation, ΔX′ change of X-axis (outward movement: +, inward movement: −), ΔY change of Y-axis (distal movement: +, mesial movement: −), ΔZ change of Z-axis (upward movement: +, downward movement: −), ΔOP-FH plane occlusal plane angle to FH plane, ΔFH to U3 long axis FH plane angle to the long axis of the maxillary canines, ΔOP to U3 cusp tip distance between the cusp tip of maxillary canines and occlusal plane, ΔVABLl change of vertical alveolar bone level on labial side, ΔVALBp change of vertical alveolar bone level on palatal side, ΔRL change of root length
  3. *p < 0.05; **p < 0.01; ***p < 0.001