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