Table 3: Descriptive statistics of overall and anterior tooth size dimensions and ratios among different occlusion groups and comparisons of their mean values by ANOVA.

Classification Maxillary 3-3 (mm) Mandibular 3-3 (mm) Anterior ratio (%) Maxillary 6-6 (mm) Mandibular 6-6 (mm) Overall Ratio (%)
Class I N 288 288 288 288 288 288
Mean 46.92 36.62 78.05 98.45 90.18 91.57
SD 0.70 0.53 0.52 1.29 1.28 0.38
Min 45.3 35.27 77.13 94.28 86.16 91.13
Max 49.69 38.72 79.42 103.51 98.62 97.01
SE 0.04 0.03 0.03 0.07 0.07 0.02
Class II N 110 110 110 110 110 110
Mean 48.88 38.64 79.14 100.32 91.83 91.54
SD 1.74 1.38 0.72 3.03 2.82 0.50
Min 44.28 34.19 77.78 91.29 83.64 90.06
Max 54.2 42.56 82.13 107.90 99.06 92.74
SE 0.17 0.13 0.07 0.29 0.27 0.05
Class III N 30 30 30 30 30 30
Mean 48.25 37.40 77.54 98.7 89.03 90.21
SD 1.75 1.32 0.66 3.42 3.26 0.79
Min 44.5 34.3 76.18 90.86 80.98 89
Max 52.29 40.14 78.84 104.2 94.39 91.79
SE 0.32 0.24 0.13 0.62 0.60 0.14
Normal N 93 93 93 93 93 93
Mean 48.36 37.46 77.54 99.37 90.85 91.41
SD 2.0 1.42 0.30 2.87 2.61 0.22
Min 44.24 34.29 77.03 92.22 84.38 91
Max 55.10 41.28 79.24 106.77 97.91 91.99
SE 0.21 0.15 0.03 0.30 0.30 0.02
p value - 0.001 0.001 0.001 0.148 0.001 0.001