Chapter 39
what is not true about image plates? A. meed to be protected in the patients mouth with barriers B. should be autoclaved C. require care not to scratch when handling D. are positioned in the mouth like dental film
B
What hardens the emulsion during fiIm processing?
Fixing
the device that intensifies or increasestthe effectof radiation and decreases the amount of exposure time neededwhen exposing an extraoral Radiograph is a?
Intensifying screen
the catergory of digital imaging similar to faxes and video equipment that uses a sensor with a cord attached to the computer is?
direct digital radiography
a plastic or metal film cassette holds and protects the extraoral film. during exposure, the side of the cassette that must face the patient is the ________ side?
front
The Radiographic image is located within the _______________of the radiographic FiIm.
gelatin that suspends the emulsion
what are the advantages of using positioning instruments?
helps control radiation exposure
the CCD in direct digital imaging sensor is made of
silicon
developer cutoff will result in what?
straight water border
which of the following time and temperature errors will result in reticulation of the film emulsion?
sudden temperature
describe PSP: what are they, how long the latent image will hold, are they reusable?
they are disposable. image receptor is a thin flexible plate, coated with phosphor crystals.
film speed is determined by what?
thickness of silver bromide salt size of silver bromide crystals
when placing a dental film in the patients mouth, the white side is placed _________ the tube and the raised dot to the _______________________?
toward, occlusal or incisal
what is the most commonly used film size for adult intraoral dentistry.
#2
___speed Film is the newest and Fastest currently available
F
different types of film sizes and describe each.
Child (size 0) BWX or PAX (4-8)age Narrow anterior (size 1) mixed dentition BWX or adult ant PAX adult size (size 2) adult BWX & post PAX performed bitewing (size 3) occlusal (size 4)
Dental Film Holders, used to position and hold the dental x-ray Film include
XCP and disposable block, eezee.grip and Endo-Ray
advantages of using automatic processor vs. manual flim processing
automatic: less equpiment/ space required manual: less error since time/ temp. are automatic
two types of extra oral film that is placed outside the mouth during x-ray exposure.
panoramic and cephalometric
what is the purpose of the lead foil in dental film packet?
reduce film fogging
