Dental Radiology Final Exam Review Latest Update 2023-2024 Questions and Correct Answers Score 100% A material or substance that does NOT stop or absorb x-rays is termed what? -
CORRECT ANSWER: Radiolucent. (Radiation gets through and darkens the film).
A material or substance that DOES stop to absorb x-rays is termed what? - CORRECT
ANSWER: Radiopaque.
A maxillary molar film reveals a triangular radiopaque landmark on the lower corner of the film. The landmark visible in this film is what structure? - CORRECT ANSWER: Coronoid process.
A processed film reveals small white spots, indicating incomplete development. The
error on the film during processing was caused by what? - CORRECT ANSWER: Air
bubbles.
A test for quality control relative to manual processing may be accomplished utilizing
what? - CORRECT ANSWER: Step wedge.
After a film is exposed, the focal-film distance is doubled. The exposure time is necessary to obtain a second film of equal density to the first film is what? - CORRECT
ANSWER: Times it by 4. Quadruplet it.
After each use, the lead lap apron must be stored in a specific way, what is it? -
CORRECT ANSWER: Hung. Never fold or crinkle.
After the films are removed from the fixer, they are washed for how long? (Manual) -
CORRECT ANSWER: 20-30 minutes.
All the the following tissues are radiopaque EXCEPT:
a.) Alveolar bone b.) enamel c.) pulp chamber and canals.
d.) cortical plate. - CORRECT ANSWER: c.) pulp chamber and canals.
As the focal-film distance is increased (going from the paralleling technique), is there
more distortion or less? - CORRECT ANSWER: Less.
Before exposing a panoramic radiograph on a patient, the dental assistant should
request the removal of what? - CORRECT ANSWER: Dentures, glasses, jewelry.
Anything from the neck up.(All of the above)
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Before seating the dental patent it is necessary to cover which items with disposable
barriers? - CORRECT ANSWER: Tube head, head rest, controls, exposure button.
(The stuff you're gonna touch after you made contact with the mouth).
Black lines across the film may be the result of what? - CORRECT ANSWER: Bent
film.
Blurred films can result from what? - CORRECT ANSWER: 1. Patient movement.
- Tubehead movement.
- Film movement.
Dark films will result from what? - CORRECT ANSWER: Under exposure.
Under developed.Cold chemicals.
During processing, when can radiographs safely be exposed to light?(If the question does not specify which method of processing, it is ALWAYS manual). -
CORRECT ANSWER: After the fixer.
During x-ray exposure and processing procedures, appropriate infection control
measures include what? - CORRECT ANSWER: - Outer film packet.
- Gloves.
- Barriers.
- Sterile film holders.
(All of the above)
Elongation is caused by what? - CORRECT ANSWER: PID too low. Insufficient
vertical angulation.
Exposure or a radiograph on a child differs from an adult in this way. - CORRECT
ANSWER: Requires less time. Turn down timer.
Exposure time is determined by what? - CORRECT ANSWER: - Film speed.
- kVp and mA settings.
Extraoral films are more or less light sensitive than intraoral? - CORRECT ANSWER: More sensitive to light.
Extraoral films are used for what purpose? - CORRECT ANSWER: 1. Diagnose
fractures.
- If patient cannot open mouth.
- Visualize pathological images of sinuses.
- View impacted teeth.
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(All of the above)