Table 1.

Description of the degrees of the IOTN (DHC score).

DHC score	Occlusion	Orthodontic treatment need
1	Perfect or almost perfect occlusion	No need
2	Occlusion with slight irregularities	Slight need
3	Occlusion with higher irregularities	Borderline need
4	Occlusion with more severe irregularities	High need
5	Severe dental health problems	Very high need