The Scientific World Journal / 2015 / Article / Tab 3

Research Article

Change of Mandibular Position during Two-Phase Orthodontic Treatment of Skeletal Class II in the Chinese Population

Table 3

(a) Dentofacial changes of the study sample () during the first phase (T0-T1), second phase (T1-T2) and combined phases (T0–T2). (b) Dentofacial changes of the three subgroups () during the first phase (T0-T1), second phase (T1-T2), and combined phases (T0–T2).
(a)

VariablesT0-T1T1-T2T0–T2
MeanSDMeanSDMeanSD

Sagittal
 Overjet (mm)−9.1***3.963.3***3.00−5.9***3.10
 Wits appraisal (mm)−7.9***3.514.5***2.93−3.4***3.57
 Maxillary prognathism
  OLp-A (mm)2.2***1.940.7*1.602.9***2.08
  SNA (°)0.51.940.62.000.12.27
 Mandibular prognathism
  OLp-Pg (mm)6.8***3.440.42.797.2***4.67
  OLp-B (mm)6.6***3.180.22.596.4***4.22
  Ar-Gn8.0***2.711.9***1.669.9***3.83
  SNB (°)2.6***1.570.61.662.0***2.38
 Jaw base relationship
  A-Pg (mm)−4.5***3.030.32.51−4.2***3.57
  ANB (°)−2.1***1.660.01.47−2.1***1.73
 Maxillary incisor
  OLp-is-OLp-A (mm)1.03.970.02.511.04.19
 Mandibular incisor
  OLp-ii-OLp-Pg (mm)3.6***2.85−3.0***2.970.53.59
 Maxillary molar
  OLp-ms-OLp-A (mm)−2.9***2.044.0***3.411.13.20
 Mandibular molar
  OLp-mi-OLp-Pg (mm)3.2***1.931.02.712.2*3.35
 Molar relationship
  ms-mi (mm)−10.7***2.455.2***2.13−5.5***2.43
Vertical
 Overbite (mm)−3.3***2.261.1***1.49−2.2**2.64
 Upper face height
  N-NL (mm)2.5***0.511.1***1.593.5***2.60
 Lower face height
  NL-Me (mm)5.6***2.071.6***1.897.2***2.65
 Total face height
  NSL-Me (mm)8.6***2.592.6***2.4011.2***3.94
 Incisor position
  is-NL (mm)2.4***2.200.9***0.913.2***2.37
  ii-ML (mm)0.52.301.4***1.900.92.41
 Molar position
  msc-NL (mm)0.61.602.9***1.682.3***1.97
  mic-ML (mm)2.6***1.272.0***1.434.6***1.85
 Rotational changes
  NL/NSL (°)0.02.310.42.120.42.89
  ML/NSL (°)0.71.900.42.051.12.49

SD: standard deviation.
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(b)

T0-T1T1-T2T0–T2
VariablesPositive growthStable growthNegative growthPositive growthStable growthNegative growthPositive growthStable growthNegative growth
MeanSDMeanSDMeanSDMeanSDMeanSDMeanSDMeanSDMeanSDMeanSD

Sagittal
 Overjet (mm)9.3***3.107.6**4.1010.5***4.383.33.982.8*1.913.8*2.966.0***2.514.8*3.296.7**3.44
 Wits appraisal (mm)7.6***3.427.3***2.618.7**4.463.33.314.5**2.285.6**2.944.3*3.23−2.92.89−3.24.58
 Maxillary prognathism
  OLp-A (mm)2.62.211.81.992.3*1.721.31.220.91.84−0.21.403.8**2.232.7*1.612.12.13
  SNA (°)0.62.290.32.230.61.39−0.21.67−0.41.84−1.42.420.42.730.01.77−0.72.31
 Mandibular prognathism
  OLp-Pg (mm)7.1***3.086.1**3.067.1***4.313.5**2.040.20.672.4**1.0810.5***4.556.3**3.234.74.36
  OLp-B (mm)7.0***2.575.8**3.077.0**3.942.31.940.00.573.0**1.549.2***4.115.8**3.194.13.89
  Ar-Gn8.5***3.537.7***2.297.8***2.322.9**1.691.6**0.861.11.8111.5***4.889.3***2.698.9***3.45
  SNB (°)2.8**1.692.2**1.262.8*1.800.61.72−0.50.92−1.8*1.373.42.781.7*1.061.02.46
 Jaw base relationship
  A-Pg (mm)4.5**2.734.4**2.29−4.84.13−2.22.200.71.572.2*1.416.7**3.223.6*2.44−2.63.69
  ANB (°)2.2*1.701.9*1.36−2.21.99−0.81.320.21.580.51.35−3.0**1.43−1.71.45−1.82.05
 Maxillary incisor
  OLp-is-OLp-A (mm)−1.12.27−0.15.33−1.83.95−0.23.030.22.120.02.56−1.34.690.04.67−1.83.32
 Mandibular incisor
  OLp-ii-OLp-Pg (mm)3.73.643.1*2.103.9*2.845.6**3.22−1.91.73−1.62.00−1.93.741.22.642.33.18
 Maxillary molar
  OLp-ms-OLp-A (mm)2.6*1.723.0**1.69−3.12.735.5**3.192.62.083.84.262.93.72−0.42.090.72.93
 Mandibular molar
  OLp-mi-OLp-Pg (mm)3.1**1.343.4**1.343.22.91−1.83.28−1.12.21−0.12.521.34.122.32.063.13.60
 Molar relationship
  ms-mi (mm)10.2***1.7010.7***2.5811.2***3.035.1***1.864.4**1.146.2***2.845.1***1.976.4***2.495.0***2.79
Vertical
 Overbite (mm)3.8**2.333.4*2.542.5*1.880.8*1.841.3***0.581.21.823.1*2.04−2.22.92−1.32.84
 Upper face height
  N-NL (mm)2.9**1.852.62.461.91.650.91.911.11.511.21.483.83.243.8**2.203.1*2.48
 Lower face height
  NL-Me (mm)6.0***2.475.3***1.905.3***1.952.2***2.461.2*1.011.51.988.2***3.516.5***1.746.9***2.37
 Total face height
  NSL-Me (mm)9.3***3.298.6***2.527.9***1.803.6***2.912.2*1.652.22.4512.9***4.9110.8***3.0610.0***3.42
 Incisor position
  is-NL (mm)2.02.232.22.452.9*2.020.80.750.51.081.2*0.852.82.752.8*2.074.1**2.21
  ii-ML (mm)−0.52.51−0.61.46−0.42.921.32.581.5*1.121.31.940.82.890.91.200.92.99
 Molar position
  msc-NL (mm)0.21.47−0.81.10−1.21.943.3***1.482.0*1.383.4**1.963.5***1.491.3*1.032.22.53
  mic-ML (mm)2.9**1.792.6***0.572.4**1.251.8**1.522.1**1.112.0*1.734.7**2.364.7***1.204.4***1.98
 Molar position
  NL/NSL (°)0.72.430.02.71−0.91.63−1.52.54−0.21.730.61.63−0.83.71−0.22.68−0.32.39
  ML/NSL (°)−0.31.79−0.71.68−1.22.26−1.52.26−0.41.450.81.86−1.82.94−1.12.06−0.42.47

SD: standard deviation.
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