CHAPTER 39 QUIZ DEN 211
Dental film holders, used to position and hold the dental x-ray films in the patient's mouth, include
-beam alignment devices such as the Rinn XCP instruments. -positioning instruments such as the disposable polystyrene bite-block, EeZee-Grip, and EndoRay.
The life of the processing solutions is affected by
-the number of films processed. -the time elapsed since last change. -the size of films processed.
Film sizes
0- children 1- anterior 2- adult 3-bite wing 4- occlusal
The recommended distance between the safelight and where the films are unwrapped is
4ft
The ideal time and temperature for manual developing is
5 minutes at 68 degrees F
F-speed dental x-ray film reduces radiation exposure to the patient by __% compared with D-speed dental x-ray film.
60%
The silver halide crystals are located within which of the following layers of the radiographic film?
Gelatin that suspends the emulsion
When loading an extraoral film into the cassette prior to exposure, the
procedure must be done in the darkroom.
Green-sensitive extraoral film is used with cassettes that have which type of intensifying screen?
rare earth
The purpose of the lead foil in the dental film packet is to
reduce film fogging
Digital radiography requires less radiation than traditional radiography because the
sensor is more sensitive to x-ray energy
All the following are true statements about phosphor storage plate (PSP) imaging system imaging plates except they
should be autoclaved
The charge-coupled device (CCD) in direct digital imaging sensors is made of
silicon
Faster film speed would be associated with _____ silver halide crystals, a _______ emulsion, and presence of special radiosensitive dyes.
smaller, thinner
Which of the following time and temperature errors will result in reticulation of the film emulsion?
sudden temperature change between developer and water bath
All of following are true statements about storage plates used with phosphor storage plate (PSP) imaging systems except that
they utilize radio frequency transmission to transmit the image to the computer via radio waves.
When placing a dental film in the patient's mouth, the white side is placed ____ the dental x-ray tubehead, and the raised dot to the ____ surface.
toward; occlusal or incisal
Positioning instruments in digital radiography
Assist in film placement and keep the patient's fingers from being exposed.
Which of the following is an extraoral film that is placed outside the mouth during dental x-ray exposure procedures?
Bite-wing
Fixer cutoff will result in a _____ border.
Straight black.
Which of the following statements about duplicating film is not correct?
The emulsion side of the film appears shiny.
When a film passes through fixer solutions before developing, the film will appear
clear
When developer solution in an automatic processor is warmer than 83° F, the processed film will appear
dark or black.
The safest place to store unopened boxes of dental film is in the
darkroom
The correct order of steps in manual film processing is
develop, rinse, fix, wash.
One reason for a lighter than normal radiograph is the
developer solution is too weak
The category of digital imaging similar to faxes and video equipment that uses a sensor with a cord attached to the computer is
direct digital radiography
_____ hardens the film emulsion during film processing.
fixing
A plastic or metal film cassette holds and protects the extraoral film. During exposure, the side of the cassette the must face the patient is the _____ side.
front
The device that intensifies or increases the effect of the radiation and decreases the amount of exposure time needed when exposing an extraoral radiograph is a(n)
intensifying screen
All the following are true statements about digitizing film-based radiographic images except
it duplicates in the same detail as the original film.
When film emulsion interacts with x-rays, the result is
latent image
Automatic film processing requires _____ than manual film processing does.
less equipment & less time
Solutions should have been changed in the processor 1 week ago. Continuing to use exhausted developer will result in ____ films.
light