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Table 1 The incidence of the orthodontic problems as assessed by the DHC of the IOTN

From: Orthodontic treatment needs in the western region of Saudi Arabia: a research report

Orthodontic Problem Incidence % Grade 1 Grade 2 Grade 3 Grade 4 Grade 5
Pre/post-normal occlusion 3   3    
Displacement 89.1 3.6 25.5 16.4 43.6  
Crossbite 44.5   14.5 13.6 16.4  
Open bite 20   9.1 6.4 4.5  
Overbite 33.6   18.2 8.2 7.3  
Overjet 33.6   16.4 9.1 5.5 2.7
Reverse overjet 3.6     2.7 0.9
Scissors bite 10.9     10.9  
Partially erupted 9.1     9.1  
Impaction 8.2      8.2
Submerged deciduous 0      0
Supernumerary .9     0.9  
Hypodontia 3.6     3.6 0
Cleft lip-Palate 3.9      3.9