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Table 1 Comparison of pre-treatment craniofacial morphology of control and treatment samples

From: Class III correction using an inter-arch spring-loaded module

Variable Control Treated Diff pvalue Sig
Mean SD Mean SD
Sagittal        
 OLp-A point 67.78 3.61 68.31 2.71 0.52 0.53 NS
 OLp-B point 71.87 3.81 74.28 3.38 2.41 0.01 S
 OLp-Pg 74.15 4.34 76.70 4.13 2.54 0.02 S
 OLp-Co −9.74 2.09 −10.06 3.69 −1.32 0.09 NS
 Wits −3.62 3.77 −4.22 2.14 −0.60 0.45 NS
 Is-OLp 73.89 4.73 74.13 3.89 0.23 0.83 NS
 Ii-OLp 73.20 3.92 74.12 3.85 0.92 0.36 NS
 Overjet 0.69 2.43 0.01 2.29 0.68 0.26 NS
 Ms-OLp 45.94 3.17 47.05 3.36 1.11 0.19 NS
 Mi-OLp 49.24 3.08 49.63 3.19 0.38 0.63 NS
 Molar relationship −3.30 1.82 −2.57 1.92 0.72 0.13 NS
Vertical        
 OLs-A point 27.04 3.92 29.40 5.22 2.36 0.06 NS
 ANS-Me 59.34 4.22 56.40 4.96 −2.93 0.01 S
 Is-NL 24.36 2.32 23.41 2.23 −0.85 0.15 NS
 Ii-ML 34.10 3.07 34.05 2.48 −0.05 0.94 NS
 Overbite 1.57 1.29 2.31 1.54 0.74 0.06 NS
 Msc-NL 17.81 1.68 18.77 2.41 0.96 0.07 NS
 Mic-ML 25.70 2.37 24.77 2.34 −0.93 0.11 NS
Angular        
 SNA 79.65 3.91 80.07 3.80 0.42 0.67 NS
 SNB 77.39 2.77 80.39 3.59 3.09 0.01 S
 ANB 2.36 3.32 −0.29 1.61 −2.66 0.01 S
 SNL-NL 9.64 2.67 9.01 3.30 −0.63 0.41 NS
 SNL-ML 38.83 4.97 32.81 5.01 −6.02 0.01 S
 SNL-OLs 21.92 3.59 20.27 3.75 −1.65 0.06 NS
 Is/SNL 100.17 6.73 102.24 9.02 2.07 0.31 NS
 Ii/ML 86.65 6.73 85.81 7.16 −0.84 0.64 NS
 Interincisal angle 134.20 7.68 139.12 13.30 4.92 0.08 NS
  1. Overjet (Is/OLp − Ii/OLp), molar relationship (Ms/OLp − Mi/OLp), maxillary base (A/OLp), mandibular base (pg/OLp), maxillary incisor (Is/OLp), mandibular incisor (Ii/OLp), maxillary molar (Ms/OLp), and mandibular molar (Mi/OLp).