Flashcards in OSCE Deck (31)
How many images are in an adult full mouth series?
How much bone should be visible around the apex of the tooth in a PA?
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
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
What is the vertical angular of the BID for bitewings with tabs?
+5-8 degrees (down)
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
In bisecting angle technique, what would cause foreshortening of the image?
Too steep vertical angular
What would cause elongation while using bisecting angle technique?
Too flat or shallow vertical angulation
What are the vertical angulations for anterior PAs (both max and mand)?
Mand - -15 to -20 degrees
Max - +40 - +50 degrees
What is the vertical angulation for max and mand posterior PAs with bisecting angle technique?
Max: +20-+40 degrees
Mand: -20 to -40 degrees
How should you position the BID using bisecting angle?
3/4 above bite block, 1/4 below
Which direction should the size 4 plate be inserted for a maxillary standard occlusal?
Which direction should the size 4 plate be inserted for a maxillary anterior occlusal?
Which direction should the size 4 plate be inserted for a maxillary lateral occlusal?
Lengthwise, rotated toward area of interest
Which direction should the size 4 plate be inserted for a mandibular anterior occlusal?
Which direction should the size 4 plate be inserted for a mandibular true occlusal?
What vertical angulation should be used while taking a max standard occlusal?
+70 through bridge of nose
What vertical angulation should be used while taking a maxillary anterior occlusal?
+60 through tip of nose
What vertical angulation should be used while taking a maxillary lateral occlusal?
+60 through outer can thus of eye
What vertical angulation should be used while taking a mandibular anterior occlusal?
-30 (with head tipped back 30= -60 degrees)
What vertical angulation should be used while taking a mandibular true occlusal?
0 degrees with occlusal plane perpendicular to the floor
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
The max or peak voltage that is used during an x-ray exposure defines what?
Kilo voltage peak
What describes the intensity if electrical current?
Is kVp or mA responsible for quality control of X-rays?
How do you increase energy of X-ray beam without increasing energy of X-ray beam?
How do you schedule radiographs for a new patient?
Recall child with high caries risk. What's the required frequency of rads?
Recall adolescent with low caries risk requires radiographs how often?
What are the frequencies of rads for adults, both high and low caries risk?
High - 6-18 months
Low - 24-36 months