30 Questions
Why must the front of the cassette be marked with the letter L or R for extraoral films?
To differentiate between the patient's left and right side
What is the purpose of the intensifying screen in a film cassette?
To intensify the effect of radiation
In extraoral radiography, what is one key difference between screen film and nonscreen film?
Sensitivity to light emitted from the intensifying screen
Why is the front side of a cassette typically made of plastic?
To allow passage of x-ray beams
What material is used on the back side of a cassette to reduce scatter radiation?
Metal
What is the purpose of the lead foil backing in a dental film packet?
To stop the radiation from extending beyond the film
Why does extraoral film not have a raised dot on it?
To avoid confusion with intraoral films
Why is an intraoral film placed inside the mouth during x-ray exposure?
To examine the teeth and supporting structures
What is the function of the black paper wrap in a moisture-proof dental film packet?
To protect the film from light penetration
When is a two-film packet used in dental radiography?
To produce two identical radiographs with one exposure
What is the significance of the identification dot on a dental film?
To differentiate the left side from the right side
Why does a film packet contain one or two films?
To produce multiple identical radiographs
What is the main purpose of using screen-type film and intensifying screens in radiography?
To reduce the amount of radiation to the patient
How does a nonscreen extraoral film differ from one that uses intensifying screens?
Requires more exposure time
What is required for duplicating radiographs?
Using special duplicating film and machine
Why should dental films be stored according to the manufacturer’s instructions?
To protect them from light, heat, and moisture
What is the purpose of a safelight in a darkroom setting?
To protect duplicating film from light
Where should dental films be stored to avoid exposure to scatter radiation?
According to manufacturer’s instructions
What is the purpose of the beam alignment device in dental radiography?
To help position the PID in relation to the tooth and film or sensor
What type of film is placed outside the mouth during x-ray exposure?
Extraoral film
Which type of film shows a wide view of the upper and lower jaws on a single radiograph?
Panoramic film
What happens if extraoral film boxes are opened in the presence of light?
The film will be exposed and ruined
What is the main purpose of Rinn XCP instruments in dental radiography?
To help with beam alignment for endodontic procedures
What is the benefit of using Rinn XCP-DS instruments in dental radiography?
They assist in holding digital sensors
What is the purpose of dental film in dental radiography?
To produce a photographic image when exposed to x-rays
What is a latent image in dental radiography?
An image only visible after processing
How is film speed determined in dental radiography?
By the size of silver halide crystals, emulsion thickness, and dyes
Which letters are used to classify film speed in dental radiography?
D, E, F
What type of film reduces radiation exposure to the patient according to the text?
F-speed
How many types of x-ray films are used in dental radiography according to the text?
Three types
Test your knowledge on EndoRay anterior and posterior bisecting angle technique radiographs, as well as beam alignment devices used in endodontic imaging. Learn about Rinn XCP instruments, color-coded bite-blocks, plastic aiming rings, and metal indicator arms.
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