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RHS DANB Study Guide- Questions and Answers
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RHS DANB Study Guide- Questions and Answers
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RHS DANB Study Guide- Questions and AnswersA panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be
caused by the patient Correct Ans-not placing the tongue against the palate
According to the inverse square law, when changing the PID length from 8 to 16 inches, the
beam's intensity is Correct Ans-1/4 as intense
Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient
should Correct Ans-decrease
film sizes would be used for an adult periapical film Correct Ans-size 2 film
During patient exposure, protection from radiation for the dental assistant includes
Correct Ans-standing behind a wall
The total destruction of microorganisms and spores on reusable instruments is accomplished
by Correct Ans-sterilizing
The Buccal Object Rule is used to determine if a foreign body is located in which direction?
Correct Ans-Lingual to buccal
The BEST radiograph to evaluate a suspected salivary stone in the submandibular gland is
a/an Correct Ans-occlusal image
, RHS DANB Study Guide- Questions and Answers
After an exposed film has been removed from a patient's mouth, the next step is to
Correct Ans-dry the exposed film
The purpose of a grid device on an extraoral cassette is to Correct Ans-reduce scatter
radiation reaching the film.
On a radiograph, what is the dense radiopaque band that outlines the edge of the mandible?
Correct Ans-Inferior border
Dilaceration in a radiographic image indicates the Correct Ans-root shape is abnormally
bent or curved
Which of the following must be monitored for radiation leakage? Correct Ans-Dental x-ray
machines
The penetrating x-ray beam produced during dental radiography is called Correct Ans-
primary radiation
During radiographic exposures, semi-critical items that must be sterilized or disposed of
include Correct Ans-film holding devices
, RHS DANB Study Guide- Questions and Answers
Patients should wear a thyroid collar during which type of radiographic exposure? Correct
Ans-intraoral radiograph
The radiation that is formed by the interaction of x-rays with matter is Correct Ans-
secondary radiation
What PID produces the greatest amount of secondary radiation? Correct Ans-Closed-end
plastic cone
Paralleling technique requires the film be placed Correct Ans-away from the tooth, toward
the middle of the oral cavity.
The lead apron and thyroid collar used during radiography should be disinfected Correct
Ans-after each use
To view an abscess on tooth #25, the best radiographic exposure is a/an Correct Ans-
periapical
What helps to decrease exposure of the thyroid gland from the primary radiation beam?
Correct Ans-Paralleling technique
What will best protect the dental assistant from cross- contamination while exposing
radiographs? Correct Ans-gloves
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