Level 5

a

Exaggerated over jet > 9 mm

h

Multiple ageneses with use of prosthetic implications (more than one teeth).

i

Missing by quadrant requiring pre-restorative orthodontic.

m

Impacted teeth (except the third molars) due to a discrepancy, a relocation, supernumerary teeth, temporary teeth that are not exfoliated or any other pathology.

p

Reversed over jet > 3.5 mm with difficulties of chewing or speaking reported by the patient.

s

Sequel of labio?alveolar fissure and/or palatines or temporary submerged teeth.

Level 4

a

Increased over jet > 6 mm but ≤9 mm.

b

Reverse occlusion with over jet > 3.5 mm with no chewing or speaking difficulties reported by the patient.

c

Posterior and anterior cross occlusion with a gap > 2 mm between the centered position and the maximal intercuspidity.

d

Relocation of the contact points > 4 mm.

e

Anterior or lateral infracclusion > 4 mm.

f

Severe and complete supraclusion with associate labial or palatine trauma.

h

Less serious agenesis (no more than one missing tooth per quadrant) requiring pre-prosthetic orthodontics or an orthodontic closing of the space to avoid bearing dental prosthesis.

l

Posterior linguoclusion with the lack of functional occlusal area in one or both lateral segments of the dental arch.

m

Reverse occlusion > 1 mm, but ≤3.5 mm with difficulties of shewing or speaking recorded by the practitioner.

t

Partial eruption of teeth inclined or locked against the adjacent teeth.

x

Supernumerary teeth.

Level 3

a

Increased over jet > 3.5 but ≤6 mm with labial inocclusion.

b

Reverse occlusion > 1 mm but ≤3.5 mm.

c

Posterior and anterior cross occlusion with a gap > 1 mm but ≤2 mm between the position of centered relation and the maximal intercuspidity.

d

Moving of the points of contact > 2 mm but ≤4 mm.

e

Anterior or lateral infraclusion > 2 mm but ≤4 mm.

f

Exaggerated and complete over jet without gingival trauma.

Level 2

a

Exaggerated over jet > 3.5 mm and ≤6 with labial occlusion.

b

Overturned overjet > 0 mm, but ≤1 mm.

c

Anterior or posterior cross occlusion with a space ≤ 1 mm between the centered position and the maximal intercuspidity one.

d

Moving of the contact area > 1 mm but ≤2 mm.

e

Anterior or posterior infraclusion > 1 mm but ≤2 mm.

f

Exaggerated supraclusion ≥ 3.5 mm without gingival contact.

g

Posterior and anterior occlusion almost normal without other abnormalities with an offset less than a 1/2 tooth.

Level 1

Minor malocclusion with small off set < 1 mm.