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What is the actual xray film composed of?
Flexible, thin, polyester plastic
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What is the emulsion composed of?
Silver halide crystals, in a gelatin base.
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What are halides compounds of?
Chlorine, bromin, and iodine.
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What is a " Latent image "?
An image stored on an exposed film, that doesn't show until it is porcessed or developed.
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What does the film packet have on the outside of it?
Why?
A sealed plastic wrap.
To protect the film from moisture and light.
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What two things, other than the film, are found inside the packet?
Black paper, and lead foil.
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What does the lead foil do?
Absorbs unused xrays.
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What are the 5 film sizes and what are they most commonly used for?
- 0- pedo (children)
- 1- narrow anterior
- 2- adults
- 3- long bite-wings
- 4- occlusal
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List 3 types of intraoral radiographs.
Periapical (PA), Bitewings (BW), Occlusal
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What do periapical xrays show?
Entire tooth and surrounding area.
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What portion of the teeth do bitewings show, and what are they primarily used for?
Coronal portion of max and mand.
Detect Interproximal decay.
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Why are occlusal films taken?
To show large areas of either the max or mand arch.
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List 4 processes occlusal films may show.
Cysts, stones, fractures, supernumerary
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What does FMX stand for?
typically how may films are involved?
Full mouth xray
18
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What are the two most common extraoral radiographs taken?
Panoramic and cephalometric (cefa - lo - metric)
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What are 4 uses of extraoral film, What do they show?
TMJ, Fractures, impactions, Pathology
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What is the film holder for extraoral film called?
Cassette
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Short scale contrast is mostly _____ and _____.
Black and White
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Long scale contrast contains multiple shades of ______.
Gray
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