Malocclusion

Question 1

Class II division I definition

Answer 1

Class II = lower incisal edges palatal to cingulum plateau of upper incisors
Division I = upper incisors proclined (increase overset)

Question 2

Most common malocclusion

Answer 2

Class II division I

Question 3

Class II skeletal profiles

Answer 3

Step in profile either maxilla too far forward or mandible too far back

Question 4

What malocclusion can digit sucking cause
What factors of digit sucking will effect malocclusion

Answer 4

Class II divison I
Age of pt, number of hours, manner in which it is sucked

Question 5

What treatment can be used for digit habit

Answer 5

• Advice: STOP
• Appliance - digit deterrent

Question 6

Soft tissue clinical assessment to check

Answer 6

• lip competency
• lower lip to upper incisor relationship
• lip form, function, fullness
• incision show rest/smiling
• nasio-labial angle
• labio-mental fold

Question 7

3 Treatment options for skeletal problems

Answer 7

1. Growth modification (correct skeletal prob)
2. Orthodontic camouflage (disguise skeletal problem)
3. Orthognathic surgery (correct by surgery)

Question 8

Stability depends on correct ……… at the correct ………..
Overjet stability depends on ……. …… control and growth of the ……

Answer 8

treatment
time
lower lip
mandible

Question 9

When should you refer for orthodontic?
growth modification:
Camouflage:
Surgery:

Answer 9

Pre puberty for growth modification (9/10 females, 12/13 males)
Any age for camouflage
Adults for surgery

Question 10

What are patients at risk at with increased overjet

Answer 10

Trauma

Question 11

Definition of class II division II

Answer 11

Class II: lower incisal edge palatal to cingulum plateau of upper incisors
Divison II: retroclined upper central incisor (over jet may be increased) - deep overbite

Question 12

Aetiology of class II divison I

Answer 12

Skeletal - maxilla too far forward or mandible too far back
Soft tissues - lips
habits - digit sucking

Question 13

Aetiology of class II division II

Answer 13

Skeletal - reduced vertical
Soft tissues - high lip line
Dental - tooth size, crown root angulation

Question 14

Overbite stability guarded depends on the change in the …….. ……. environment. Moving upper …… away from lower …….

Answer 14

soft tissue
incisors
lip

Question 15

Class III Malocclusion

Answer 15

Lower teeth are protruded infront of upper teeth

Question 16

Class III is the least common malocclusion, what plays an important aetiology factor

Answer 16

Genetics

Question 17

4 types of treatment available for class III malocclusion

Answer 17

1. Simple anterior cross bite correction (removable or fixed appliance)
2. Growth modification (under ager of 10, headgear)
3. Orthodontic camouflage (fixed - for mild cases not severe)
4. Orthodontics and surgery (more severe cases)