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
