Malocclusion N No. of primary Rugae No of secondary Rugae No. of fragmentary Rugae Mean No. of Rugae
Right Left Right Left Right Left
Class I 24 3.00± .60 3.13± .75 .65± 1.11 0.26± .62 0.60± 0.83 0.65 ± 1.027 8.30 ± 3.11
Class II div 1 20 3.00± 0.59 3.08± 0.70 0.44± 0.65 0.36± 0.63 0.56± 0.86 0.60± 0.81 8.04 ± 2.30
Class II div 2 10 4.00± 0.00 4.00± 0.00 1.00± 0.000 1.00± 0.00 2.00± 0.00 2.00± 0.00 14.00± 0.00
Class III 12 3.00± 0.68 3.21± 0.58 .64± 0.74 0.64± 0.50 0.43± 0.76 0.42± 0.64 8.35 ± 2.69
F   1.761 1.133 0.456 1.895 2.129 1.950  
Sig (p Value)   0.164 0.343 0.714 0.140 0.106 0.131  
Table 1: Mean and standard deviation for number of palatal rugae on right and left side in various malocclusions along with statistical ANOVA test for significance.