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29 Cards in this Set

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On a periapical film, how much bone should be recorded?
2-4mm of NORMAL bone
What does XCP stand for?
eXtension Cone Paralleling
What is the Snap-A-Ray film holder primarily used for?
endodontic radiography
T/F: You can steam autoclave and XCP.
True
What are the 4 basic principles of Intraoral Radiography
Patient Head position, Location of the long axes of teeth, X-Ray beam angulations, point of entry of X-Ray beam
T/F: On the maxilla, all of the long axes of the teeth are tilted facially.
True
On the mandible, the anteriors are tilted _____.
facially
On the mandible, the premolars are _______.
vertical
On the mandible, the molars are tilted ______.
lingually
If a PA shows the teeth elongated in the superior-inferior dimension and the apices are cut off, the BID was vertically _____-angulated
under
If a PA shows the teeth foreshortened, the crowns are cut off, and too much periapical bone is seen, the BID was vertically _____-angulated
over
If you have faulty horizontal angulation on a PA, you will get:
overlapped structures
T/F: Alveolar bone loss is best shown on a periapical film.
F. Alveolar bone loss is best shown on a bitewing.
On a premolar bitewing, the vertical angulation is __ degrees.
+10
On a molar bitewing, the vertical angulatino is __ degrees.
+20
On a canine PA, the (mesial OR distal) contact should be open.
mesial. The distal contact is overlapped due to curvature of the arch.
T/F: On a premolar or molar PA film, the buccal and lingual cusps should not overlap.
F. The buccal and lingual cusps should be superimposed.
On a maxilarry occlusal radiograph, the vertical angulation should be __ degrees.
+60 to +65
On a mandibular occlusal radiograph, the verticual angulation should be __ degrees.
-90
How would you do a FMX for an edentulous patient?
14-film survey (1-midline, 2-lat/canine, 2-premolar, 2-molar PER ARCH) with size #2 film using XCP. Note: Panoramic is a better way to go here, if available.
What is the useful range of film density?
0.3 (very light) to 3.0 (very dark).
What are the 3 primary factors controlling radiographic density?
mAs, kVp, and source-film distance
Name the secondary factors contolling radiographic density.
development conditions, film type, intensifying screens, grids, object density
T/F: Low contrast means few shades of gray.
F. Low contrast means MORE shades of gray.
If you use kVp in the range of 80-90, will you have high or low contrast?
LOW - there are more penetrating x-rays and density differences will be small.
Periapical radiographs should show relatively ____ contrast.
Low, for osseous changes
Bitewing radiographs should show relatively ____ contrast.
High, for dental caries detection
T/F: change in density by changing mAs only will produce an obvious change in contrast.
F. Density and contrast are both changed when kVp and mAs are altered.
What is an unsharp margin or blurred zone on the image that is seen as the x-rays originate from the focal spot and travel in a straight line?
penumbra