Interceptive Orthodontics

Question 1

what is interceptive orthodontics

Answer 1

any procedure which reduces or eliminates chances of developing a malocclusion

Question 2

when do you use growth modification

Answer 2

for underlying skeletal pattern

Question 3

what do you check for if a patient has unilteral crossbite

Answer 3

displacement on closing

Question 4

why would the cause of a patient displacing on closing be

Answer 4

issue with dental aetiology

Question 5

what are the causes of posterior crossbites

Answer 5

teeth in upper arch tipped
upper arch narrow compared to lower

Question 6

what does the presence of AOB and unilateral crossbite represent

Answer 6

digit sucking habit

Question 7

if the digit sucking habit persists what happens to the teeth and why

Answer 7

teeth tip
forces from tongue, masseter and negative force in oral cavity

Question 8

name some habit breaking appliances

Answer 8

goal post URA
fixed bands on molars and wire on palate called tongue rake

Question 9

if a habit breaking URA is worn constantly how long will it take to break habit

Answer 9

4-8wks

Question 10

why do we want to quit habits early

Answer 10

eruption of permanent incisors
skeletal vertical discrepancy persists into adulthood if keep sucking

Question 11

what are the causes of AOB

Answer 11

tongue thrust
thumb sucking
skeletal position
upper and lower incisors only partly erupted

Question 12

if a patient is missing the permanent tooth what do you check for

Answer 12

palpate
check percussion note and mobility of primary

Question 13

what is a balancing extraction

Answer 13

opposite side of same arch

Question 14

what is a compensating extraction

Answer 14

opposing tooth on opposite arch

Question 15

do we balance 6s

Answer 15

no

Question 16

when do we compensate for 6s

Answer 16

when taking lower 6 and you think upper 6 will be unopposed for long time

Question 17

why does the space close quickly if you extract upper 6

Answer 17

angulation that the 7 is erupting at

Question 18

when is the favourable time to extract 6s

Answer 18

bifurcation of lower 7s calcifying
angulation of 7 is mesial
presence of 8

Question 19

what age do the signs of favourable extraction of a 6 appear at

Answer 19

8

Question 20

when do you balance a deciduous tooth

Answer 20

lose c
patient crowded and lose d

Question 21

if you lose an E early what is a good idea

Answer 21

placing space maintainer

Question 22

why do you need to treat infraoccluded teeth

Answer 22

adjacent teeth will tip and you wont be able to remove it easily

Question 23

if a tooth is infraoccluded and there is no permanent successor what do you do

Answer 23

urgent referral for hypodontia to paeds/ortho

Question 24

what are the consequences of anterior crossbites

Answer 24

gingival recession labial to anterior incisor
mobility in teeth
displacement on closing

Question 25

what do you use to treat anterior crossbite

Answer 25

URA with posterior bite plane
then use z spring to move tooth

Question 26

what is the cause of impacted 6s

Answer 26

manifestation of crowding

Question 27

what can you do if the mesial cusp of the 6 is impacted under the distal of the E

Answer 27

place separator for a week
or distalise 6 with URA

Question 28

what are the causes of midline diastema

Answer 28

hypodontia
generalised spacing
low hanging fraenum
laterals impinging on central roots
unerupted supernumerary tooth