Table 4 Intergroup comparison of treatment changes (t tests)
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 |