Adhesive layer
A thin layer of adhesive material that covers both sides of the receptor base and attaches the emulsion to the base.
Cassette
A light-tight device used in extraoral radiography to hold the film and intensifying screens.
Bitewing film
Is used to examine the crowns of both maxillary and mandibular teeth on one film.
Blue-sensitive film
An extraoral film that requires the use of a screen for exposure and is sensitive to blue fluorescent light; this film must be paired with screens that produce blue light.
Cephalometric film
An extraoral image that is used to determine facial growth and development, trauma, disease, and developmental abnormalities.
D-speed film
The slowest intraoral film; used before E-speed film; the letter D identifies the film speed.
Duplicating film
A special type of photographic film used to make an identical copy ( duplicate) of an intraoral or extraoral radiograph; this film is not exposed to x-radiation.
F-speed film
The fastest intraoral film available; the letter F identifies the film speed; also called InSight.
Green sensitive film
An extraoral film that requires the use of a screen for exposure and its sensitive to green fluorescent light; this film must be paired with screens that produce green light.
Nonscreen film
An extraoral film that does not require the use of a screen for exposure.
Occlusal film
A receptor used to examine large areas of the maxilla and the mandible; the patient "occlusal" or bites on the entire receptor.
Periapical film
An intraoral receptor used to examine the entire tooth (crown and root) and supporting bone.
Screen film
An extraoral film that requires the use of a screen for exposure; this film is sinsitive to the light emitted from intensifying screens.
X-Ray film
An image receptor that consists of a film base, adhesive layer, film emulsion, and protective layer; three types of x-Ray film may be used in dental radiography: (1) intraoral film, (2) extraoral film, and (3) duplicating film.
Film base
A flexible piece of plastic that is constructed to withstand heat, moisture, and chemical exposure and provides strength and stable support for the film emulsion.
Film emulsion
A costing attached to both sides of the film base by the adhesive layer to give the film greater sensitivity to x-radiation; homogenous mixture of gelatin and silver halide crystals.
Film speed
The amount of radiation requires to produce a radiograph of standard density.
Fluorescence
The emission of s glowing light by certain substances when struck by a particular wavelength (e.g., calcium tungsten screens have phosphors that emit blue light, or fluoresce, when exposed to x-Rays).
Gelatin
A component of the film emulsion that suspends and disperses silver halide crystals over the film base.
Halide
A chemical compound that is sensitive to radiation or light; in dental radiography, a halide, such as silver bromide, is suspended in the gelatin of the emulsion.
Identification dot
A small raised bump that appears in one corner of an intraoral film; used to determine film orientation.
Image
A picture or likeliness of an object.
Image receptor
A recording medium; examples include x-Ray film or digital sensors.
Interproximal
Between two adjacent surfaces.
Label side
The outer side of the x-Ray film packet that is color-coded and contains printed information; the label side of the film faces the tongue.
Latent image
The pattern of stored energy on the exposed film; the invisible image produced when the film is exposed to x-Rays and that remains invisible until the film is processed.
Latent image centers
Aggregated of neutral silver atoms on exposed crystals that collectively become the latent image on the emulsion of the film.
Lead foil sheet
One of the four components of the dental x-ray film packet; a single piece of embossed lead foil placed behind the film to shield the film from scattered radiation.
Outer package wrapping
One of the four components of the dental x-ray film packet; a soft vinyl or paper wrapper that serves to protect the film from exposure to light and saliva. It has two sides: the tube side and the label side.
Film packet
The intraoral film and its surrounding packaging.
One film packet
A film packet containing one film.
Two film packet
A film packet containing two films.
Paper film wrapper
One of the four components of the dental x-ray film packet; a black paper protective sheet covers the film and shields it from light.
Phosphors
Minute fluorescent crystals that cover intensifying screens and fluorescence,or emit visible light, when exposed to x-rays.
Protective layer
One of the four basic components of x-ray film; a thin, protective coating on top of the emulsion that protects the film from manipulation and mechanical and processing damage.
Duplicate radiograph
An identical copy off radiograph that is made through the process of film duplication.
Receptor
Something that responds to a stimulus; a recording medium (example: x-ray film or digital sensors).
Calcium tungstate screen
A type of intensifying screen used in extraoral radiography; contains phosphors that emit blue light.
Intensifying screen
A device used in extraoral radiography that converts x-ray energy into visible light; the light, in turn, exposed the screen film.
Rare earth screen
A type of intensifying screen used in extraoral radiography; contains phosphors not usually found in the earth that emit green light.
Sensitivity speck
An irregularity within the lattice structure of the exposed silver halide crystals that attracts the silver atoms.
Silver halide crystals
Crystals that are suspended in the emulsion of the dental x-ray film (e.g., silver bromide, silver iodide); function to absorb radiation during x-Ray exposure and store energy from the radiation.
Tube side
The outer side of the x-ray film packet that is solid white and exhibits a raised bump in one corner; the tube side of the film faces the teeth and tubehead.
The component of an x-ray film described as "a thin transparent coating that is placed over the emulsion" is termed:
Protective layer
The component of the x-ray film described as "a flexible piece of plastic that withstands heat, moisture, and chemical heat" is termed:
Film base
The chemical compounds that change when exposed to radiation or light are termed:
Silver halide crystals
The invisible pattern of stored energy on the exposed film is termed:
Latent image
Dental x-ray film that is placed inside the mouth and used to examine the teeth and supporting structures is termed:
Intraoral film
The identification dot on the intraoral film is significant because:
The dot determines film orientation
One advantage of a film with an emulsion coating on both sides (double-emulsion film) is that:
The film requires less radiation exposure to make an image.
The purpose of a lead foil sheet in the film packet is:
To protect the film from back scattered radiation
Which of the following is not found on the label side of the film packet?
Expiration date
Which of the following film sizes is known as the standard film?
Size 2
Which of the following is the largest intraoral film size?
Size 4
The film characteristic that is "the amount of radiation needed to produce a radiograph of standard density" is:
Speed
The speed of a film is determined by the size of the silver halide crystals in the emulsion. Identify the true statement:
The larger the crystals, the faster is the film speed.
A film that is placed outside the mouth during x-ray exosure is termed a(n):
Extraoral film
A screen film is more sensitive to fluorescent light than to direct exposure to x-Rays.
True
Nonscreen extraoral film is commonly used in extraoral radiography.
False
The device that transfers x-ray energy into visible light is termed:
Intensifying screen
The intensifying screen that emits green light and must be used with green-sensitive film is a:
Rare earth screen
The device used to hold the extraoral film and intensifying screens is termed a:
Cassette
Which of the following statements is true?
Cassettes are available in sizes that correspond to film and screen sizes.
Which of the following results if the intensifying screens are not in perfect contact with the screen film?
A loss of image sharpness occurs.
Which of the following statements about duplicating is false?
It may be placed intraorally or extraorally.
Identify the ideal temperature and humidity levels for film storage: 50 F to 70 F; 30% to 50%
50 F to 70 F; 30% to 50%