Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Orthodontics > Interceptive orthodontics > Flashcards

Interceptive orthodontics Flashcards

1
Q

What is the orthodontic timetable?

A

Primary dentition
Early-mixed dentition
Late-mixed dentition
Permanent dentition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When is the best time for orthodontic treatment?

A

early permanent dentition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the primary dentition, when established?

A

Established by 30 months
Positive overjet and overbite
Spacing normal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When is delayed eruption important?

A

When contralateral side different

abnormal sequence eruption

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the primary dentition problems?

A 
Delayed eruption 
Missing teeth
Supernumary teeth 
Abnormal teeth
Crowding
Overjet
Class III
Crossbite 
Caries/trauma
Habits
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Does missing primary mean will get missing permanent?

A

can indicate this, but not always

Affects less than 1% of population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When are supernumerary teeth a worry?

What is the percentage that will have primary then permanent supernumerary

A

If causing displacement of other teeth

30-35% of patients will then get permanent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

When do abnormal teeth need treatment

A

When displacing the permanent tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a fusion tooth?

A

2 teeth fused together - have 2 roots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is a germinated tooth?

A

One tooth, one root, looks large

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why would you want to extract abnormal teeth?

A

To allow alignment of single permanent tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How much spacing is needed in the primary dentition for there to be enough space in the permanent dentition?

A

> 6mm spacing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

If have an overjet in the primary dentition what does that mean for permanent?

A

Will probably be greater in the permanent dentition

Don’t do treatment at primary stage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Are crossbites in primary usually in permanent too?

A

Skeletal crossbites - tend to persist

Dental crossbites - variable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When may you want to treat crossbite?

A

If causing displacement between ICP and RCP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the problem with trauma to the primary tooth?

A

Possible ankylosis
Look out for deflection of permanent successor
Get dilaceration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What can habits cause in the primary dentition?

A

Anterior open bite
Unilateral crossbite
No intervention at this stage - not a problem till permanent teeth through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is leeway space? What does this allow?

A 
The mesio-distal width of the C,D,E are wider than the 3,4,5 underneath
Common to have 1st molars in 1/2 unit class II, the leeway space allows the molars to drift mesially into class I
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the leeway space in the lower and upper arch?

A 
Lower = 2.5mm
Upper = 1.5mm
20
Q

What is the size discrepancy between primary and permanent incisors?

A

Upper 7mm greater when permanent
Lower 5mm greater
Permanent also more proclined to give more space
Lower, mandible grows to create space

21
Q

If have delayed eruption what do you need to check?

A

No trauma
Dilacerated incisor
Most common cause midline = supernumerary teeth that needs to be removed

22
Q

How would you treat an erupted mesiodens?

A

Extract and align

23
Q

How would you treat an unerupted supernumerary mesiodens preventing incisors from erupting?

A

Need to remove via surgery XGA

24
Q

What is a supplemental tooth? How do you treat it?

A

Looks exactly the same as the tooth next to it

Extract as most are poorly formed or displaced

25
Q

If have premature loss of a C and D what can this cause

A

Shift in centreline to the side that had C or D removed

26
Q

What happens if have premature loss of E?

A

Mesial movement of 6’s, uses up the space needed for the 5’s
Space loss greater and faster in the upper arch
In the upper arch, mesial movement/rotation of 6’s results in the 5’s being excluded palatally

27
Q

What needs to be dont if extract a C and D to prevent loss of centreline

A

balance the extraction

28
Q

Why don’t you balance the loss of E’s?

A

Disrupts occlusion

Can be unpredictable effect and doesn’t change the centre line

29
Q

Would you compensate in the primary dentition?

A

No, if 6’s then would compensate

30
Q

What are the problems with space maintainers?

A

Patient’s are often unsuitable for appliances
Must fit immediately
Often unnecessary

31
Q

What are the causes of a midline diastema in the early-mixed dentition stage?

A

Normal - ugly ducklin stage 21/12 distally inclines because of the position of the canine crowns
Supernumerary tooth
Generalised spacing
Proclined upper incisors: Class II div I from digit sucking
Trauma
Pathology

32
Q

What would you do if have an increased overjet in the early mixed dentition?

A

No advantage to treatment in the mixed dentition

Decide whether to treat now or wait - may want to treat early if lips are really incompetent

33
Q

How could crowding be treated in the early mixed dentition? (not actually done)

A

Transverse expansion in lower arch relapses

Extract primary teeth -B’s or C’s but this just moves the crowding to premolar area

34
Q

What are the indications for extraction of primary canines?

A 
Permit local incisors to align
Allow incisor to be moved over the bite 
Potentially to improve the position of palatally displaced permanent canines
Severe upper and lower crowding 
Upper laterals palatal/impacted
35
Q

How would you treat posterior crossbite in the early mixed dentition?

A

Consider treating early if have mandibular displacement on closure
Correct with URA

36
Q

How would you correct the posterior crossbite

A

URA:
Midline screw
Adam’s cribs on 6’s 0.7mm diameter SS (retention and anchorage)
Acrylic baseplate (anchorage)

37
Q

In the early mixed dentition what should be done about habit?

A

Educate patient and parents cessation of the habit

38
Q

What can be done if patient has class III in early mixed dentition?

A

URA
Suitable for some class III aged 8-10 years old
Refer to an orthodontic specialist
Screw to expand the upper arch, wear for 14 hours a day

39
Q

What are the problems faced in the late mixed dentition

A 
Missing teeth
Infraoccluded teeth
Crowding 
Poor quality 6's 
Ectopic canines 
Habits
40
Q

What needs to be done if have infraoccluded teeth?

A

Monitor then extract under LA

41
Q

What can be done if have ectopic canines in the late mixed dentition?

A

Refer at time of diagnosis
Screen every year old patient for palpation of maxillary canines buccally and radiographs
Refer to orthodontist if evidence of ectopic position

42
Q

What is the effect of habits in the late mixed dentition?

A

Proclined upper incisors
Anterior open bite
Unilateral posterior cross-bite
Increased overjet

43
Q

When can you get better spontaneous correction of occlusion with digit sucking?

A

when stop before 8 years old

44
Q

What removable appliance can be used for patients that digit suck?

A

Hayrake passive removable appliance - for correction of anterior openbite
wear 3 months full-time and 3 months night time only
It works by getting in the way every time patient tries to suck thumb

45
Q

If have an overjet in late mixed dentition what can be done to treat?

A

Funcitonal appliances best during adolescent growth spurt 11-13 years
need something to put crib on - 4’s

46
Q

What are the problems with adult treatment?

A

Lack of growth
Multilated dentition determining extraction patterns, reduced perio support for retention, perio disease
Co-operation can be difficult - ability to attend
Different expectations
Can’t have any active disease, no bleeding on probing, more uncomfortable

Orthodontics (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions