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Flashcards in OSCE Deck (31)
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0

How many images are in an adult full mouth series?

19

1

How much bone should be visible around the apex of the tooth in a PA?

2-3mm

2

What are the landmarks that must be included in a successful premolar bite wing?

Distal of both canines, max and mand bone levels, majority of contacts open

3

What landmarks must be included in a successful molar bite wings?

Distal surface of most distal fully erupted tooth, max and mand bone levels, majority of contacts open

4

What is the vertical angular of the BID for bitewings with tabs?

+5-8 degrees (down)

5

What are three indications for PA examinations?

1) to examine the PA tissues for pathology
2) to assess caries extent
3) to assess bone levels

6

In bisecting angle technique, what would cause foreshortening of the image?

Too steep vertical angular

7

What would cause elongation while using bisecting angle technique?

Too flat or shallow vertical angulation

8

What are the vertical angulations for anterior PAs (both max and mand)?

Mand - -15 to -20 degrees
Max - +40 - +50 degrees

9

What is the vertical angulation for max and mand posterior PAs with bisecting angle technique?

Max: +20-+40 degrees
Mand: -20 to -40 degrees

10

How should you position the BID using bisecting angle?

3/4 above bite block, 1/4 below

11

Which direction should the size 4 plate be inserted for a maxillary standard occlusal?

Crosswise

12

Which direction should the size 4 plate be inserted for a maxillary anterior occlusal?

Lengthwise

13

Which direction should the size 4 plate be inserted for a maxillary lateral occlusal?

Lengthwise, rotated toward area of interest

14

Which direction should the size 4 plate be inserted for a mandibular anterior occlusal?

Lengthwise

15

Which direction should the size 4 plate be inserted for a mandibular true occlusal?

Crosswise

16

What vertical angulation should be used while taking a max standard occlusal?

+70 through bridge of nose

17

What vertical angulation should be used while taking a maxillary anterior occlusal?

+60 through tip of nose

18

What vertical angulation should be used while taking a maxillary lateral occlusal?

+60 through outer can thus of eye

19

What vertical angulation should be used while taking a mandibular anterior occlusal?

-30 (with head tipped back 30= -60 degrees)

20

What vertical angulation should be used while taking a mandibular true occlusal?

0 degrees with occlusal plane perpendicular to the floor

21

Name 3 indications for use of occlusal technique.

- examine large areas of upper and lower jaw when area of interest is larger than a PA image
- when a patient can't tolerate PAs
- locating impacted teeth and roots
- assessing the extent of lesions
- evaluating fractures
- assessing changes in the size and shape of mandible
- locating foreign body
- examine the floor of mouth

22

The max or peak voltage that is used during an x-ray exposure defines what?

Kilo voltage peak

23

What describes the intensity if electrical current?

Milliamperes

24

Is kVp or mA responsible for quality control of X-rays?

KVp

25

How do you increase energy of X-ray beam without increasing energy of X-ray beam?

Increase mA

26

How do you schedule radiographs for a new patient?

Individualized

27

Recall child with high caries risk. What's the required frequency of rads?

6-12 months

28

Recall adolescent with low caries risk requires radiographs how often?

18-36 months

29

What are the frequencies of rads for adults, both high and low caries risk?

High - 6-18 months
Low - 24-36 months

30

What are lateral cephs used to assess?

- ortho/orthographic surgery planning
- soft tissues of the face
- bones of skull and face
- trauma an disease