2015 Questions Pt. 4 Flashcards

1
Q

In a High Pull Headgear, if the bow is bent above the COR of the maxilla, what happens to the molars?

A

Distal tip of the root

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

A fingerspring is used, where is the center of rotation on the incisor?

A

Apical 1/3

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

Putting buccal crown torque on one tooth, where is the wire compared to the plane of occlusion

A

Below

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

When you’re using class II elastics that goes through the center of resistance of the maxilla and distal to the center of rotation of the mandible, what does it do to the planes?

A

Steepen the mandibular occlusal plane

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

If canine is 10 mm away and force is 100 g, what is the moment?

A

1000 g/mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Early extraction of a mandibular primary canine will lead to all of the following except?

A

Correction of a midline shift

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

How many canine impactions are labial and how many are palatal?

A

1/3 labial

2/3 palatal

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

If the canine is impacted and the canine crown is distal to the lateral, what percentage will self correct?
What if it’s mesial to the lateral?

A

91% self correct when distal

64% self correct when mesial

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

If canine erupts in place of a missing lateral incisor space and the c is retained, how much alveolar bone is lost?

A

< 1%

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

What do patient’s complain about after canine substitution?

A

Color

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

What do you not consider when substituting a canine for a lateral

A

Buccal occlusion on opposite/unaffected side

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

Patient has normal width of maxillary incisors and has black triangles. What is the most important consideration?

A

Mesiodistal inclination
But might be Crown height/width radio
Might also be all of the above

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

T/F
In early mixed dentition, you need to treat skeletal open bite
Because you can diagnose it easily at this stage

A

True

True

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

What percentage of young kids w/ anterior open bite do we have to treat?

A

20%

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

What percentage of open bite close on their own?

A

80%

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

Which one is not a characteristic of a skeletal anterior open bite?

A

Short posterior cranial base length

No evidence to suggest that posterior length affects sagittal discrepancy

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

Case question:

Patient has wide buccal corridors

18
Q

Case question:

Maxillary excess, what can you do, there is only 3 incisors

A

Flare upper and retrocline lowers

19
Q

T/F
Most of the early crowding can be solved if you do serial extraction
You get more incisor retroclination by doing so

20
Q

T/F
Preferred way to treat a class II patient is to decrease the OP to SN angle.
This is because increasing SN-MP leads to instability

21
Q

T/F

Hispanics have greater incidence of Class III than Caucasians

22
Q

Which of the following is not true about arch form?

A

Mandibular arch form is based on the maxillary arch form

This is not true, it’s the other way around

23
Q

What is not an acceptable record to evaluate an orthodontic patient with perio problems?

24
Q

When can perio patient start orthodontic treatment?

A

After getting approval from dentist/periodontist

25
T/F Measuring papilla levels to bone is predictable It should be 5 mm from contact to alveolar crest of bone
True | True
26
What is the stability of anterior open bites treated surgically and nonsurgically?
82% of open bites treated surgically are stable | 75% of open bites treated nonsurgically
27
When impacting maxilla, where do you put the maxillary arch relative to the face?
Measure incisal display at rest and that will tell you how much impaction can be done
28
What is the relationship of maxillary incisors to stomion superiorus in a patient with skeletal open bite?
Below
29
In a surgical case where mandibular advancement is required, what is a presurgical consideration?
Do not level COS
30
Extraction patterns for surgical patients
Class II U5's + L4's Class III U4's + L5's Extract to decompensate
31
Extraction patterns for nonsurgical cases:
Class II U4s + L5s | Class III U5s + L4s
32
If your patient has a droopy lip after BSSO surgery, what nerve was injured?
Facial Nerve - buccal branch to facial
33
Best type of surgery for class III patient with TMD problems
IVRO | No rigid fixation
34
Distraction osteogenesis of mandible is not associated with:
TMD
35
Endodontically treated teeth have how much resorption compared with non-endodontically treated teeth?
About the same
36
After apexification with CaOH, increased risk of what?
Root fracture
37
For restorative or implant, what is the size of the lateral?
2/3 width of the central
38
Max central incisor - Ideal width to height percentage
80%
39
What maxillary alveolar ridge development for implants in U2 position and the upper B's are still present, what do you do?
Extract B's and let 3's erupt mesial and retain C's
40
If 17 yr old guy has a ceph taken 6 months from now and doesn't show growth, can you place implant immediately?
yes
41
Maxillary anterior ridge width after extraction experiences what % BL
23% | Posterior: 30%
42
Tetracycline staining around implants means what?
It is rigid with high bone turnover