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Table 4 Intergroup comparison of treatment changes (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 (°) − 1.73 3.17 − 0.58 2.79 0.131
 Co-A (mm) − 0.95 4.12 − 0.29 2.00 0.416
Mandibular component
 SNB (°) 0.49 2.27 − 0.02 2.27 0.376
 Co-Gn (mm) 3.55 5.14 1.98 3.27 0.153
Maxillomandibular relationship
 ANB (°) − 2.21 2.19 − 0.56 1.87 0.002a
 NAP (°) 2.95 4.44 0.49 2.79 0.010a
Growth pattern
 SN.GoGn (°) − 0.58 2.89 − 1.18 3.12 0.434
 LAFH (mm) 2.45 2.56 1.10 3.51 0.088
Maxillary dentoalveolar component
 Mx1.NA (°) − 1.11 6.38 1.91 7.80 0.098
 Mx1-NA (mm) − 0.68 3.09 − 0.38 3.27 0.716
 Mx1-PP (mm) − 0.66 1.24 − 0.43 1.74 0.533
 Mx6-PP (mm) 1.96 2.10 0.78 1.98 0.024a
 Mx Molar asymmetry (mm) − 0.16 0.43 0.75 1.13 0.000a
Mandibular dentoalveolar component
 Md1.NB (°) − 1.03 5.08 3.09 4.59 0.001a
 Md1-NB (mm) − 0.47 0.96 0.86 1.34 0.000a
 IMPA (°) − 0.67 5.58 3.13 5.62 0.009a
 Md1-GoGn (mm) 0.98 2.05 0.49 1.86 0.325
 Md6-GoGn (mm) 2.12 1.67 1.40 1.63 0.087
 Md Molar asymmetry (mm) 1.06 0.57 0.09 0.72 0.000a
Dental relationship
 Overjet (mm) − 2.23 1.72 − 2.03 1.87 0.648
 Overbite (mm) − 0.88 2.27 − 1.16 1.31 0.551
Upper lip
 UL-S Line (mm) − 1.85 2.34 − 1.28 1.44 0.241
 Prn-H (mm) 3.80 4.43 2.65 2.88 0.223
Lower lip
 LL-S Line (mm) − 1.68 2.27 − 0.88 1.47 0.101
Facial convexity and nasolabial angle
 Z Angle (°) 2.15 4.72 0.68 5.41 0.254
 N’.Sn.Pog’(°) 1.41 4.68 0.03 3.89 0.207
 Cm.Sn.UL (°) 1.71 7.73 1.69 9.22 0.992
  1. aStatistically significant at P < 0.05