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Table 3 Descriptive statistics of inclination of occlusal plane and other skeletal/dental variables pre- and post- treatment

From: Changes of occlusal plane inclination after orthodontic treatment in different dentoskeletal frames

Measurements Skeletal class I (n= 30) Skeletal class II (n= 30) Skeletal class III (n= 30)
Mean ± SD Mean ± SD Mean ± SD
Pre- Post- Differences Pre- Post- Differences Pre- Post- Differences
Skeletal frame          
 SNA°a 81.99 ± 2.85 81.54 ± 3.72 −0.46 ± 1.57 81.33 ± 2.88 81.30 ± 2.85 −0.76 ± 1.15 78.33 ± 3.67 78.74 ± 3.46 0.42 ± 1.21
 SNB° 79.32 ± 2.95 79.36 ± 3.81 0.04 ± 1.35 76.60 ± 3.06 77.16 ± 2.67 0.56 ± 1.40 79.45 ± 3.38 79.66 ± 3.92 0.22 ± 1.38
 ANB° 2.68 ± 0.64 2.18 ± 0.87 −0.49 ± 0.99 5.44 ± 0.88 4.15 ± 1.24 −1.29 ± 1.11 −1.11 ± 0.96 −0.93 ± 1.10 0.18 ± 1.22
 MP-SN° 31.52 ± 4.04 32.09 ± 4.78 0.57 ± 1.55 34.59 ± 4.71 34.75 ± 4.59 0.16 ± 1.88 32.04 ± 6.00 32.07 ± 6.20 0.03 ± 1.48
Occlusal plane          
 BOP-SN° 14.57 ± 3.82 15.29 ± 4.29 0.72 ± 2.59 17.34 ± 4.43 18.85 ± 4.12 1.51 ± 3.11 14.41 ± 4.29 14.67 ± 4.72 0.26 ± 2.32
 FOP-SN° 14.70 ± 4.10 14.00 ± 4.68 −0.69 ± 3.61 17.36 ± 4.58 17.96 ± 4.44 0.60 ± 2.96 14.65 ± 4.47 14.16 ± 4.78 −0.49 ± 2.98
 MxOP-MnOP° 8.10 ± 2.44 3.50 ± 1.43 −4.60 ± 2.82 8.77 ± 3.30 3.70 ± 1.08 −5.07 ± 3.01 5.69 ± 3.22 3.83 ± 1.38 −1.86 ± 3.29
Dental          
 Overbite (mm) 3.79 ± 1.31 1.63 ± 0.70 −2.16 ± 1.46 4.30 ± 1.70 1.73 ± 0.63 −2.57 ± 1.51 2.34 ± 1.66 1.67 ± 0.68 −0.67 ± 1.71
 Overjet (mm) 4.01 ± 1.28 2.76 ± 0.58 −1.25 ± 1.30 4.81 ± 1.86 2.63 ± 0.57 −2.18 ± 1.96 2.54 ± 1.37 2.53 ± 0.66 0.24 ± 1.39
Maxillary dentoalveolar          
 U1-SN° 103.02 ± 6.41 108.36 ± 5.91 5.33 ± 7.72 99.53 ± 6.19 105.68 ± 4.74 6.16 ± 7.88 105.23 ± 5.07 109.73 ± 5.98 4.50 ± 5.65
 U1-PP (mm) 26.29 ± 2.59 26.70 ± 2.58 0.41 ± 1.54 26.66 ± 3.11 27.31 ± 3.40 0.65 ± 1.21 25.49 ± 3.05 26.42 ± 3.42 0.93 ± 1.51
 U6-PP (mm) 19.98 ± 2.22 21.30 ± 2.39 1.32 ± 1.49 19.56 ± 2.64 20.83 ± 2.55 1.28 ± 1.20 20.17 ± 2.55 21.67 ± 2.65 1.50 ± 1.33
Mandibular dentoalveolar          
 L1-SN° 54.79 ± 6.33 51.20 ± 5.83 −3.60 ± 6.26 49.38 ± 6.96 44.65 ± 5.26 −4.73 ± 4.56 59.94 ± 6.69 59.10 ± 6.62 −0.84 ± 5.09
 L1-MP° 93.68 ± 6.82 96.71 ± 5.31 3.03 ± 6.77 96.04 ± 6.37 100.43 ± 6.06 4.40 ± 4.31 88.02 ± 5.88 88.89 ± 5.79 0.87 ± 5.21
 L1-MP (mm) 37.30 ± 3.08 38.78 ± 3.27 1.48 ± 2.28 38.21 ± 2.79 39.38 ± 3.70 1.16 ± 2.47 36.23 ± 3.13 37.70 ± 3.38 1.47 ± 1.09
 L6-MP (mm) 27.52 ± 2.30 29.91 ± 2.47 2.39 ± 1.81 27.86 ± 2.58 30.69 ± 2.61 2.82 ± 1.75 26.81 ± 2.46 28.79 ± 2.40 1.98 ± 1.01
  1. a “°” represents the unit of angle measurement “degree”.