DANB Radiology practice exam
Questions and Answers (100% Score)
The type of radiograph that would show the whole tooth including the
crown, roots, and jaw line is called: - Answer✔️✔️-Periapical x-ray
A bitewing radiograph is useful in diagnosing all of the following: -
Answer✔️✔️-tooth decay, periodontal bone loss, gum disease
A full mouth survey generally includes: - Answer✔️✔️-14 periodical views
and 4-6 bitewings
The best radiograph to obtain for diagnosis o=of temporomandibular joint
(TMJ) is: - Answer✔️✔️-Panoramic
What type of radiograph is used by an orthodontist to assist with treatment
planning? - Answer✔️✔️-Cephalometric - study and measurement of the
head
What is a true statement regarding the use of lead aprons and thyroid
collars? - Answer✔️✔️-The apron should cover from the neck to just above
the patients knees.
Where is the most appropriate place to store dental film? - Answer✔️✔️-In a
cool, dry closet.
A dental assistant experiences an occupational exposure. A patient's blood
has splashed into the employees eye. What are the appropriate steps to
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take? - Answer✔️✔️-Document the incident, including the source individual,
the employee, route of exposure, and how it happened.
Which is a false statement regarding hand washing? - Answer✔️✔️-Alcohol-
based hand gel can be used in place of soap and water on hands that are
visibly dirty.
A new patient has recently moved to the area and arrives for her first
appointment in the dental practice. She is 6 months pregnant. She is
complaining of a tooth ache. She does not bring dental records with her.
Which would be the most appropriate for obtaining dental x-rays? -
Answer✔️✔️-Only x-ray the area she is complaining about using the lead
apron and thyroid collar for protection.
What is the name of the device used to monitor employees for radiation
exposure? - Answer✔️✔️-Dosimeter
For intraoral x-rays, what film speed is the fastest and reduces the amount
of patient exposure to radiation? - Answer✔️✔️-F-speed
Which of the following is used to control the degree of penetration of the x-
ray beam? - Answer✔️✔️-Kilovoltage peak selector (kVp)
A reverse smile line observed on a panoramic image is likely due to: -
Answer✔️✔️-Position of the patient's chin is too high
A cone-shaped radiopaque image on a panoramic x-ray is likely caused by:
- Answer✔️✔️-Use of the thyroid color during imaging
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How does the use of photostimulable storage phosphor (PSP) plates affect
digital radiography? - Answer✔️✔️-PSP plates do not offer immediate access
to the digital image
Which is NOT a disadvantage to digital radiography? - Answer✔️✔️-Lost
images
The use of outdated dental film may cause the x-ray to have: - Answer✔️✔️-
A foggy or gray appearance
What would not be a reason for the dental x-ray image to come out black? -
Answer✔️✔️-Processing time is too short - it would appear white
What would happen to an x-ray film that is left in the processing solution
too long? - Answer✔️✔️-The image will be either partially or completely
missing
A dental x-ray that has the appearance of black lines that look like a tree
branch is caused by: - Answer✔️✔️-Overexposure
What type of chemical is used in the developing agent to convert the silver
halide crystals to black? - Answer✔️✔️-Hydroquinone - reducing agent that
is soluble in water (major component in black and white photographic
developers for film and paper)
During manual processing, how long should the film remain in the
developer solution if the temperature of the solution is 65 degree F -
Answer✔️✔️-6 minutes
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