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20 Cards in this Set

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ALARA
As low as reasonably achievable- a policy of using lowest amount of raiation exposure possible
Ala- Tragus
Imaginary line from the ala(wing) of the nose (skin projection at the ear) center of the ear.
Bisecting angle technique
Is where the central beam is directly perpendicular with imaginary line of the angle formed by the plane of the film and long axis of the tooth.
Central ray
the useful beam
Periapical film packet
used for the intraoral view of the entire tooth and surrounding structures
Bitewing film packet
records crown and interproximal views of both arches while in occlusion
Occlusal film packet
this film may be used intraorally to expose large areas; size 4 film
Extraoral film
radiographs exposed outside the oral cavity
Cephalometric
Extraoral radiograph of the head used in orthodontics
Panoramic
Extraoral radiograph producing entire dentition with surrounding structures on one film
Intensifying screen
layer of fluorescent crystals within a cassette which give off a bluish light which helps form latent image on the film faster with less exposure
Latent image
the invisible image produced on radiographic film by the action of light or radiation before development
Vertical angulation
direction of the central beam is placed in an up or down position
Zero angulation
Angulation achieved by positioning the PID parallel with the floor
PID
Position indicating device-is used to collimate and direct the central beam and determines the target distance
target distance
distance between the film and source of radiation
Bite Block
device that is inserted between teeth to hold film during exposure
XCP
extension cone paralleling device-used with a locator or aiming ring, indicator rod and assorted blocks
Developing
Chemical process used to produce the latent image on a radiographic film
Fixing
Chemical process which stops developer action and makes image permanently visible