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