Classification of Malocclusions

Question 1

What anatomical features are used to determine angles class?

Answer 1

Mesiobuccal cusp of maxillary first molar & buccal groove of mandibular first molar

Question 2

A classification system is a grouping of ______ for ease in handling & discussion; it is not a system of diagnosis, method for determining prognosis, or a ______

Answer 2

clinical cases of similar appearance; way of defining treatment

Question 3

A classification system is NOT: (3)

Answer 3

1. a system for diagnosis
2. method for determining prognosis
3. way of defining treatment

Question 4

Why do we classify? (3)

Answer 4

1. traditional reasons
2. ease of reference
3. communication

Question 5

How old is Angle’s classification?

Answer 5

100 years

Question 6

Angle’s classification is the most ________ and used ____

Answer 6

Universally popular; worldwide

Question 7

Angle’s classification is based on the relationship of the _____ and the alignment (or lack of it) of the teeth relative to the ______

Answer 7

first permanent molars; line of occlusion

Question 8

The mesiobuccal cusp of the upper first molar articulates or occludes on the buccal groove of the lower first molar:

Answer 8

Class I occlusion

Question 9

Determine the Angle’s Classification:

Answer 9

Class I occlusion

Question 10

Normal or class I molar relationship, teeth are well aligned with proper overbite and overjet:

Answer 10

Normal occlusion

Question 11

Normal occlusion is normal or class I molar relationship, where teeth are well aligned with proper:

Answer 11

overbite and overjet

Question 12

Determine the Angle’s Classification:

Answer 12

Class I occlusion

Question 13

Normal or class I molar relationship but teeth are crowded, rotated or spaced:

Answer 13

Class I malocclusion

Question 14

Determine the Angle’s Classification:

Answer 14

Class I malocclusion

Question 15

Determine the Angle’s Classification:

Answer 15

Class I malocclusion

Question 16

What type of radiograph is seen in this image?

Answer 16

Cephalometric

Question 17

Class II malocclusion may also be referred to as:

Answer 17

distocclusion

Question 18

Lower molar distal to upper molar, relation of other teeth to line of occlusion not specified:

Answer 18

Class II malocclusion

Question 19

In class II malocclusion, the lower molar is ____ to the upper molar

Answer 19

distal

Question 20

In Class II division 1-

1. Maxillary incisors in:
2. Increased:
3. ____ maxilla and/or _____ mandible

Answer 20

1. proclination
2. overjet
3. prognathic maxilla and/or retrognathic mandible

Question 21

Determine the Angle’s Classification:

Answer 21

Class II division 1

Question 22

Describe the maxillary incisors in this class II division 1 classification:

Answer 22

Maxillary incisors are proclined

Question 23

Describe the overjet in this class II division 1 classification:

Answer 23

Increased overjet

Question 24

In a class II division 1 classification; the maxilla may be _____ and/or the mandible may be _____

Answer 24

prognathic maxilla; retrognathic mandible

Question 25

Determine the Angle’s Classification:

Answer 25

Class II division 1

Question 26

Determine the Skeletal Classification:

Answer 26

Class I skeletal

Question 27

Determine the Skeletal Classification:

Answer 27

Class II division 1

Question 28

In the following profile view, the incisors are in ______ and the mandible is _____

Answer 28

labioversion; retrusive

Question 29

In Class II division 2, the maxillary central incisors are ____ while the maxillary lateral incisors have tipped ____ & ____, sometimes overlapping the central incisors

Answer 29

retroclined; labially & mesially

Question 30

Describe the maxillary central incisors in Class II division 2:

Answer 30

retroclined

Question 31

Describe the maxillary lateral incisors in Class II division 2:

Answer 31

Tipped labially and mesially (sometimes overlapping the central incisors)

Question 32

In class II division _____

• The maxillary central incisors are retroclined
• The maxillary lateral incisors have tipped labially and mesially, sometimes overlapping the central incisors

Answer 32

Class II division 2

Question 33

Determine the Angle’s Classification based off the mesially and labially tipped lateral incisors

Answer 33

Class II division 2

Question 34

Determine the Angle’s Classification:

Answer 34

Class II division 2

Question 35

Determine the Skeletal Classification:

Answer 35

Class II division 2

Question 36

Determine the Angle’s Classification:

Answer 36

Class III malocclusion

Question 37

Class III malocclusion may also be called:

Answer 37

Mesiocclusion

Question 38

Lower molar mesial to upper molar, relation of other teeth to line of occlusion not specified:

Answer 38

Class III malocclusion

Question 39

Determine the Angle’s Classification:

Answer 39

Class III malocclusion

Question 40

Determine the Angle’s Classification:

Answer 40

Class III malocclusion

Question 41

Determine the Skeletal Classification:

Answer 41

Class III

Question 42

Determine the Angle’s Classification:

Answer 42

Class III malocclusion

Question 43

Asymmetric occlusion where one side is class II or III and the other is usually class I:

Answer 43

subdivision