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Table 3 Intergroup comparison at the pretreatment 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 (°) 84.10 4.10 83.28 4.04 0.429
 Co-A (mm) 82.65 3.81 83.41 3.53 0.415
Mandibular component
 SNB (°) 79.32 3.98 79.26 3.06 0.946
 Co-Gn (mm) 110.95 4.59 111.96 5.89 0.451
Maxillomandibular relationship
 ANB (°) 4.77 1.75 4.02 2.19 0.137
 NAP (°) 171.65 4.39 172.88 4.11 0.254
Growth pattern
 SN.GoGn (°) 29.19 3.96 27.86 4.36 0.210
 LAFH (mm) 63.43 4.33 62.32 4.41 0.316
Maxillary dentoalveolar component
 Mx1.NA (°) 24.45 5.49 25.75 7.16 0.423
 Mx1-NA (mm) 5.53 2.44 5.50 3.86 0.971
 Mx1-PP (mm) 28.40 2.23 26.81 2.95 0.018a
 Mx6-PP (mm) 20.35 2.36 19.43 1.98 0.098
 Mx Molar asymmetry (mm) 1.99 0.33 2.19 0.39 0.025a
Mandibular dentoalveolar component
 Md1.NB (°) 28.82 5.01 27.85 6.02 0.489
 Md1-NB (mm) 5.87 1.41 5.94 2.10 0.872
 IMPA (°) 97.56 5.83 99.22 7.93 0.350
 Md1-GoGn (mm) 35.97 2.29 35.46 2.86 0.442
 Md6-GoGn (mm) 26.83 2.19 27.32 2.33 0.387
 Md Molar asymmetry (mm) 2.09 0.46 1.79 0.57 0.025a
Dental relationship
 Overjet (mm) 4.88 1.80 4.96 1.78 0.856
 Overbite (mm) 1.89 2.31 1.97 1.10 0.863
Upper lip
 UL-S line (mm) 2.41 2.42 1.41 1.98 0.077
 Prn-H (mm) 0.91 4.56 3.31 4.00 0.030a
Lower lip
 LL-S line (mm) 3.50 3.04 1.95 2.46 0.029a
Facial convexity and nasolabial angle
 Z Angle (°) 75.85 5.51 73.92 6.61 0.214
 N’.Sn.Pog’(°) 156.08 5.13 157.63 6.07 0.276
 Cm.Sn.UL (°) 105.07 8.93 101.23 8.26 0.081
  1. aStatistically significant at P < 0.05