The prevalence of malocclusion and the need for orthodontic treatment among adolescents in the northern border region of Saudi Arabia: an epidemiological study

Table 1 Variables and detentions used in the study

Antero-posterior deviations
Angle’s molar relationship	Class I
	Class II
	Class III
Overjet	Normal (1–2 mm),
	Excess (> 2 mm),
	Reduced (< 1 mm)
	Reverse overjet or Anterior crossbite (< 0)
Vertical deviations
Overbite	Normal (1–2 mm)
	Excess (> 2 mm),
	Reduced (< 1 mm)
Open bite	Absent
Open bite	Present
Transverse deviation
Posterior crossbite	Absent
Posterior crossbite	Present
Alignment
Spacing	Absent
Spacing	Present
Crowding (Overlapping of erupted teeth due to insufficient space or lack of space for teeth to erupt in the dental arch)	Absent
	Present
Facial profile
Type	Straight profile
	Convex profile
	Concave profile

ISSN: 1472-6831