RDA Exam: Questions & Answers
Supernumerary teeth are best detected using what type of image receptor?(Ans- panoramic
The most common radiographic exposure used to evaluate a dental implant
on an adult is:
bitewing.panoramic.occlusal.periapical.(Ans- periapical
Compared to a dentulous patient, radiographic exposure time on an
edentulous adult patient should:
remain unchanged decrease be doubled increase (Ans- decrease
Which image would be best utilized to see the relationship of the alveolar bone?Periapical Vertical bitewing Horizontal bitewing Occlusal (Ans- vertical bitewing
Where is the most common area in the oral cavity for a dentigerous cyst?Around the third molars Around the canines Between the central incisors Between the premolars (Ans- around the third molars 1 / 4
After using a lead apron on a patient for digital radiograph exposure, it
should be:
sprayed with high level disinfectant.covered with a barrier.wiped with intermediate disinfectant.folded and stored in a closed cupboard for future use.(Ans- wiped with intermediate disinfectant
The total destruction of microorganisms and spores on reusable
instruments is accomplished by:
disinfecting.sterilizing.ultrasonic immersion.spraying with a germicide.(Ans- sterilizing
A panoramic image appears to have a "reverse smile" when the:
Frankfort plane is angled upward.midsagittal plane is angled to the right.midsagittal plane is angled to the left.Frankfort plane is angled downward.(Ans- Frankfort plane is angled upward
On a full mouth series with eighteen images, how many anterior images are exposed?5 6 7 8 (Ans- 6
To view an abscess on tooth #25, the best radiographic exposure is a/an occlusal.panoramic. 2 / 4
bitewing.periapical.(Ans- periapical
Which of the following regulates the manufacturing and installation of x-ray equipment?American Dental Association Federal Government Local Government State Government (Ans- Federal Government
During radiographic exposures, semi-critical items that must be sterilized or
disposed of include:
sensor positioning devices.tubehead.exposure buttons.PID.(Ans- sensor positioning devices
ALARA is primarily concerned with the radiation that is terrestrial.artificial.environmental.cosmic.(Ans- artificial
On an anterior image, the anterior alveolar crest normally appears:
flat and smooth as a triangular-shaped radiopacity as a dense radiopaque line pointed and sharp (Ans- pointed and sharp
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Prior to exposing dental radiographs on a visually impaired patient, the
dental assistant should:
set the exposure time to increase radiation.ask the caregiver to stabilize the image receptor.use touch to explain the equipment and procedure.set the exposure time to decrease radiation.(Ans- use touch to explain the equipment and procedure
Which of the following would cause elongation on a radiograph?Excessive horizontal angulation Excessive vertical angulation Insufficient vertical angulation Insufficient horizontal angulation (Ans- Insufficient vertical angulation
The most important step the dentist can take in protecting patients from x-
radiation is to:
avoid filtration.properly use collimation.avoid positioning devices.properly prescribe radiographs.(Ans- properly prescribe radiographs
For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must be a minimum of 1.0 mm.
1.5 mm.
2.0 mm.
2.5 mm.(Ans- 1.5 mm
Which of the following errors occur when the vertical angulation is incorrect?Blurred image Elongation
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