Occlusal Classifications

Question 1

What is the classification for molars?

Answer 1

Angle’s molar classification

Question 2

What is the classification for incisors?

Answer 2

British standards institute incisor classification (1983)

Question 3

What molar class is this?

Answer 3

Class 1 - mesiobuccal cusp of the upper 1st molar should occlude with the anterior buccal grove of the lower first permanent molar

Question 4

what Angle’s molar classification would this describe? - mesiobuccal cusp of the upper 1st molar should occlude with the anterior buccal grove of the lower first permanent molar

Answer 4

class 1

Question 5

What Angle’s molar classification is this?

Answer 5

Class 2 - mesiobuccal cusp of the upper first molar occludes anterior to the anterior buccal groove of the lower first molar

Question 6

What Angle’s molar classification is this? - mesiobuccal cusp of the upper first molar occludes anterior to the anterior buccal groove of the lower first molar

Answer 6

Class 2

Question 7

What Angle’s molar classification is this?

Answer 7

Class 3 - mesiobuccal cusp of the upper first molar occludes posterior to the anterior buccal groove of the lower first permanent molar

Question 8

What British standards institue incisor classification is this?

Answer 8

Class 1 - the lower incisor edge occludes with or lies immediately below the cingulum plateau of the upper central incisors

Question 9

What incisor classification is this? - the lower incisor edge occludes with or lies immediately below the cingulum plateau of the upper central incisors

Answer 9

Class 1

Question 10

What is a class II Div 1 incisor classification?

Answer 10

the lower incisor edge lies posterior to the cingulum plateau of the upper central incisors
- the overjet is increased and centrals are usually proclined

Question 11

What would this be?

Answer 11

Class II div 1 incisor classification

Question 12

What is a class II div 2 incisor classification?

Answer 12

the lower incisor edge lies posterior to the cingulum plateau of the upper central incisors
- the overjet is usually minimal and the centrals are usually retroclined

Question 13

What incisor classification is this?

Answer 13

Class II div 2

Question 14

What is a class 3 incisor classifcation?

Answer 14

the lower incisor edge occludes anteriorly to the cingilum plateau of the upper central incisors

Question 15

What incisor classification is this?

Answer 15

Class 3

Question 16

what is the relative position of the maxilla and mandible called?

Answer 16

the skeletal pattern

Question 17

the skeletal pattern should be assessed in what 3 dimensions for a malocclusion?

Answer 17

• AP
• Vertical
• Transverse

Question 18

What is this clinically estimating?

Answer 18

A-P (anteroposterior) dimension
Class 1, 2, 3

Question 19

what radiograph would you take to analyse the AP, vertical and transverse relations of the maxilla and mandible?

Answer 19

Lateral cephalometric

Question 20

In the vertical dimension for occlusion, what 2 planes should meet at the base of the skull?

Answer 20

frankfort plane and mandibular plane should meet at base of skull

Question 21

if the frankfort plane and mandibular plane meet before the base of the skull, what will this do to the height of the lower face

Answer 21

increased lower face height