Classifications of Malocclusions Flashcards
1
Q
Prevalence of malocclusion
A
65%
2
Q
Prevalences of incisal malocclusions
A
C I - 50%
C II D I - 40%
C II D II - 10%
C III - 5%
3
Q
Crowding
A
Total tooth size - total arch length
mild - <3mm
moderate - 4-5mm
severe - >6mm
4
Q
Skeletal class I
A
ANB 2-4
5
Q
Skeletal class II
A
ANB >4
6
Q
Skeletal class III
A
ANB <2
7
Q
Angle’s Class I
A
MB of upper first molar occludes with the anterior buccal groove of the lower first molar
8
Q
Angle’s Class II
A
Lower arch is at least 1/2 a cusp’s width posterior to class I
9
Q
Angle’s Class III
A
Lower arch is at least half a cusp’s width anterior to class I
