Class II Div 2 Malocclusion

Question 1

what is the BSI definition of class II div 2 maloclussion

Answer 1

lower incisor occludes posterior to cingulum plateau of upper incisor
upper incisors retroclined
overjet reduced

Question 2

what are the usual skeletal elements of Class II div 2 malocclusions

Answer 2

usually mild or moderate class II skeletal base

Question 3

in the vertical skeletal examination what would you expect the FMPA to be on class II div 2 malocclusion

Answer 3

reduced

Question 4

what would you expect from the vertical face height of an individual with class II div 2 malocclusion

Answer 4

reduced vertical face height

Question 5

what would you expect from the soft tissue profile of a patient with class II div 2 malocclusion

Answer 5

prominent chin
high resting lower lip line
trapped lower lip

Question 6

what is seen from upper laterals in class II div 2 malocclusions

Answer 6

have shorter clinical crowns so escape the effect of the strap lower lip which retroclines the upper centrals

Question 7

name two dental development abnormalities associated with class II div 2 malocclusion

Answer 7

more impacted canines
more microdontia

Question 8

what is usually seen with regards to buccal segments in class II div 2 malocclusions

Answer 8

class II buccal segments

Question 9

give two reasons why class II div 2 malocclusions are important to treat

Answer 9

aesthetic concerns
dental health concerns - traumatic overbite

Question 10

what are the four stages for managing class II div 2 malocclusions

Answer 10

accept
growth modification
camouflage
orthodontic treatment

Question 11

what growth modification treatment is used in class II div 2 malocclusions

Answer 11

modified twin block - proclination of upper incisors

Question 12

how long should a functional appliance be worn for to work best

Answer 12

at least 22 hours a day for 6-9 months

Question 13

what is and ELISA spring

Answer 13

expansion labial segment aligner

Question 14

to camouflage class II div 2 into a class I incisor relationship what is needed in fixed ortho

Answer 14

overbite reduction
correction of inter-incisal angle

Question 15

give the combination of how inter-incisal angles are corrected

Answer 15

palatal root torque of upper incisors
proclination of lower incisors

Question 16

when is FABP used

Answer 16

class II malocclusions

Question 17

give three reasons why orthognathic surgery may be considered

Answer 17

too severe malocclusion for orthodontics alone
non-growing patients
profile concerns

Question 18

give two reasons why treating class II div 2 is difficult

Answer 18

rotated laterals and deep overbite more likely to relapse
long term bonded retention usually required