Chapter 7 Flashcards
Which of these is not a component of dental x-ray film?
A) Protective layer
B) Base
C) Phosphor crystals
D) Emulsion
C) Phosphor crystals
Which of these is not a component of the dental x-ray film packet?
A) Black paper wrapping
B) One or two films
C) Moisture-resistant outer wrapping
D) Aluminum foil
D) Aluminum foil
Each of the following statements regarding dental x-ray film speed is true except one. Which one is the exception?
A) E-speed film is the fastest film speed currently available.
B) Film speed is printed on the back side of each individual film packet.
C) Trademark names like “Insight” or “Ultra” are not film speeds.
D) Film speeds slower than D are no longer used.
A) E-speed film is the fastest film speed currently available.
Which of the following intraoral film sizes is the largest?
A) Size 1
B) Size 2
C) Size 3
D) Size 4
D) Size 4
The advantage of manual processing over automatic processing is that there is
A) less hazardous waste production.
B) more time required to produce finished radiographs.
C) less malfunction of processing equipment.
D) less water used.
C) less malfunction of processing equipment.
Each of the following statements regarding duplication film is correct except one. Which one is the exception?
A) The emulsion side of duplicating film contains an antihalation coating.
B) The solarized emulsion records the copy of the image.
C) The emulsion side of duplicating film is placed against the original radiograph.
D) The antihalation coating prevents back-scattered light from reexposing the film.
A) The emulsion side of duplicating film contains an antihalation coating.
Which of the following statements regarding extraoral film is false?
A) It is used outside the mouth.
B) It comes individually wrapped in protective paper.
C) It is called a “screen film.”
D) It uses intensifying screens.
B) It comes individually wrapped in protective paper.
Which of the following statements regarding film storage and protection is false?
A) It is light sensitive.
B) It has a shelf life.
C) It is affected by high heat and humidity.
D) It should be stored in the darkroom.
D) It should be stored in the darkroom.
Extraoral film is used for all of the following projections except one. Which one is this exception?
A) Lateral jaw radiographs
B) Occlusal radiographs
C) Cephalometric radiographs
D) Panoramic radiographs
B) Occlusal radiographs
Each of the following statements is true except one. Which one is the exception?
A) During exposure, the x-rays strike and ionize all silver halide crystals on the film.
B) The invisible image on an x-ray film is called the “latent image.”
C) The function of the gelatin in film emulsion is to keep the silver halide crystals evenly suspended over the base.
D) Silver halide in the emulsion is primarily silver bromide.
A) During exposure, the x-rays strike and ionize all silver halide crystals on the film.
Dental film has a polyester base for the purpose of
A) increasing the contrast and image quality.
B) providing support for the emulsion.
C) producing the latent (invisible) image.
D) preventing scatter radiation from exposing the film.
B) providing support for the emulsion.
Which portion of the dental film retains the latent image?
A) Protective layer
B) Gelatin
C) Silver halide crystals
D) Adhesive
C) Silver halide crystals
Which structure is most likely to absorb or stop more of the x-rays from reaching the film?
A) Enamel
B) Bone
C) Pulp
D) Soft tissue (cheek)
A) Enamel
Which of these protects the film from white light exposure?
A) Antihalation coating
B) Solarized emulsion
C) Lead foil
D) Black paper
D) Black paper
The purpose of the identification dot on the film packet is to
A) identify which side of the film contains the emulsion.
B) determine if the film packet contains one or two films.
C) distinguish the patient’s right from left on the developed radiograph.
D) locate the edge of the packet that should be positioned toward the apices.
C) distinguish the patient’s right from left on the developed radiograph.
Which of the following indicates the correct placement of an intraoral film?
A) The back side faces the buccal surfaces of the teeth and away from the source of radiation.
B) The back side faces the lingual surfaces of the teeth and toward the source of radiation.
C) The tube side faces the buccal surfaces of the teeth and toward the source of radiation.
D) The tube side faces the lingual surfaces of the teeth and toward the source of radiation.
D) The tube side faces the lingual surfaces of the teeth and toward the source of radiation
Each of the following affects film speed except one. Which one is the exception?
A) Emulsion thickness
B) Crystal size
C) Film packet size
D) Special dyes
C) Film packet size
Graininess of a radiographic image results from
A) large silver halide crystals.
B) the addition of radiosensitive dyes.
C) a decrease in film speed.
D) film packets that contain two films.
A) large silver halide crystals.
Which film size comes with a preattached bite tab and is used exclusively to take bitewing radiographs?
A) Size 0
B) Size 1
C) Size 2
D) Size 3
D) Size 3
Each of the following statements regarding automatic film processing is correct except one. Which one is the exception?
A) It requires diligent care for optimal performance.
B) Chemical solutions are heated to match the temperature used in manual processing.
C) If processor rollers are not kept clean, films can emerge streaked.
D) It uses a roller transport system to move the film through the processing cycle.
B) Chemical solutions are heated to match the temperature used in manual processing.
Film used for dental radiography is very similar to photographic film.
True
Intraoral films are designed for use outside the oral cavity.
False
Dental x-ray film is surrounded by a sheet of white paper inside the film packet.
False
Film packets may contain one or two films.
True
The tab for opening the film packet is on the tube side of the packet.
False
During periapical radiograph film packet placement, the embossed dot should be positioned toward the apices of the teeth.
False
Intraoral film is also known as screen film.
False
Pedodontic films are usually size 2 films.
False
The radiation exposure needed for extraoral film projections is higher than that needed for intraoral projections.
False
The same film type used for exposing dental radiographs can be used to duplicate them.
False
A fast-speed film requires more radiation exposure to record a diagnostic image.
False
The latent image is slow in its formation, especially when using slow-speed film.
False
The purpose of the lead foil in the film packet is to absorb back-scattered x-rays to reduce film fog.
True
Dental film emulsion is about 90 to 99 percent silver bromide and 1 to 10 percent silver iodide.
True
The appearance of clear/white or radiopaque structures on the radiograph is a result of the developer step during film processing.
False
Intraoral film emulsion is composed of a gelatin and silver halide crystals.
True
The white, unprinted side of an intraoral film packet is the back side.
False
A pedodontic film is any film used to radiograph a child’s teeth.
False
Duplicating film gets lighter the longer the exposure to light.
True
Film should be stored in its original packaging in an area shielded from radiation.
True
What is the invisible image present on a dental x-ray film that does not become visible until after processing?
The latent image.
What is placed in the film packet by the manufacturer to absorb scattered radiation?
Lead foil.
What is the color of the tube side of the film packet?
White.
What number is given to occlusal film to indicate its size?
Size 4.
What type of film is needed to copy a dental radiograph?
Duplicating film.
Silver halide crystals suspended in gelatin form which part of dental x-ray film?
The emulsion.
For what is the identification dot in one corner of intraoral dental x-ray film used?
is used to distinguish the patient’s right and left sides.
Which side of the film packet faces the source of radiation?
The tube side of the film packet faces the tube (the source of radiation), while the back side of the film packet faces away from the source of radiation.
The sensitivity of a given type of dental x-ray film is known as its what?
Speed
What presents a reduction in radiation for screen film?
The intensity of the fluorescent light emitted by the intensifying screens
