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Table 5 Intergroup comparison at the posttreatment stage (t tests)

From: Dentoskeletal and soft tissue changes in class II subdivision treatment with asymmetric extraction protocols

  Group 1—3 extractions (n = 31) Group 2—1 extraction (n = 32)  
Variables Mean S.D. Mean S.D. P
Maxillary component
 SNA (°) 82.37 4.75 82.70 4.65 0.778
 Co-A (mm) 81.77 4.00 83.12 3.46 0.156
Mandibular component
 SNB (°) 79.81 4.22 79.24 2.55 0.518
 Co-Gn (mm) 114.50 6.30 113.95 5.36 0.708
Maxillomandibular relationship
 ANB (°) 2.56 2.44 3.46 2.83 0.183
 NAP (°) 174.60 3.95 173.38 3.86 0.218
Growth pattern
 SN.GoGn (°) 28.61 5.45 26.68 4.80 0.140
 LAFH (mm) 65.88 4.76 63.42 4.77 0.044a
Maxillary dentoalveolar component
 Mx1.NA (°) 23.34 5.21 27.66 8.11 0.014a
 Mx1-NA (mm) 4.85 2.42 5.12 4.13 0.758
 Mx1-PP (mm) 27.74 2.27 26.38 2.81 0.039a
 Mx6-PP (mm) 22.31 2.21 20.20 2.19 0.000a
 Mx Molar asymmetry (mm) 1.83 0.42 2.94 1.07 0.000a
Mandibular dentoalveolar component
 Md1.NB (°) 27.79 5.18 30.94 5.13 0.018a
 Md1-NB (mm) 5.42 1.39 6.80 2.00 0.002a
 IMPA (°) 96.89 6.49 102.34 7.39 0.002a
 Md1-GoGn (mm) 36.95 2.94 35.95 2.89 0.180
 Md6-GoGn (mm) 28.95 2.28 28.72 2.58 0.713
 Md Molar asymmetry (mm) 3.15 0.58 1.88 0.54 0.000a
Dental relationship
 Overjet (mm) 2.65 0.68 2.94 0.73 0.109
 Overbite (mm) 1.01 0.74 0.81 0.95 0.353
 Upper lip
 UL-S Line (mm) 0.56 2.67 0.14 2.55 0.524
 Prn-H (mm) 4.72 5.07 5.96 4.64 0.312
Lower lip
 LL-S Line (mm) 1.81 2.86 1.07 2.48 0.272
Facial convexity and nasolabial angle
 Z Angle (°) 77.99 6.95 74.59 4.46 0.023a
 N’.Sn.Pog’(°) 157.49 5.94 157.67 5.90 0.905
 Cm.Sn.UL (°) 106.79 9.51 102.93 10.55 0.132
  1. aStatistically significant at P < 0.05