DANB RADIOLOGY EXAM PRACTICE QUESTIONS AND ANSWERS
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Course
Dental Radiology
Institution
Dental Radiology
DANB RADIOLOGY EXAM PRACTICE
QUESTIONS AND ANSWERS
3 film holding devices used for bisecting - Answer️️ -dentsply rinn stabe,
rinn BAI, dental SUPA
3 film holding devices used for paralleling - Answer️️ -dentsply rinn
XCP-DS, Rinn XCP, flow dental RAPD
a patient complains of pain in t...
An insurance company request a patient's radiographs when examining a
dental claim you only have one copy of the radiographs. what should you
duplicate and which should go to the insurance company? - Answer✔️✔️-
Duplicate, which will go to the insurance company.
The office keeps the best copy
Desired thickness of lead apron - Answer✔️✔️-.25 mm
Difference between direct and indirect exposure sensor - Answer✔️✔️--
Direct means directly obtaining a digital image by exposing intraoral
sensor to x-rays to provide an image that can be viewed on a computer.
-indirect is photostimuble phosphor plate sensor technology, obtaining a
digital image in which an exposed phosphor plate is placed into a scanner
and then converted into a digital image.
Explain PSP - Answer✔️✔️--Photostimuable Phosphor Plate aka storage
phosphor system
-indirect digital imaging
-captures analog data then processed in a laser scanning device
-light is then converted into electrical signal that the computer uses to
create the digital image
Films submerged, totally in fixer but not in developer. What will it look
like? - Answer✔️✔️-The part that was fixed, but not developer would be
clear
How are indirect exposure films exposed - Answer✔️✔️-X-rays hit phosphor
screen creating fluorescent light that exposes the film
How are stable film holders cleaned between use - Answer✔️✔️-Sterilize
film holder devices or discard disposable image receptor holding devices
How are x-rays formed in the tube head - Answer✔️✔️-Turn on the machine,
adjust settings, press exposure button, filament heats up/ thermionic
emission, electron cloud is formed, electrons flow from cathode to anode,
electrons strike target, energy is converted into x-rays and heat
How can exposure to the operator be reduced? - Answer✔️✔️-move farther
from the radiation
How can you differentiate the zygoma from the maxillary sinus in a
maxillary posterior PA? - Answer✔️✔️-- The maxillary sinus appears as
three sided pyramid
- The zygoma appears a J-shaped
How do you determine how often to take radiographs - Answer✔️✔️-
evidence based selection criteria
How do you differentiate between maxillary and mandibular molars when
mounting? - Answer✔️✔️-- you differentiate them by how many roots are in
the molars
- Maxillary have roots and mandibular have two roots
How does exposure time differ between adults and children? - Answer✔️✔️-
The exposure time is cut by 1/3
How does exposure time for children compare to that of an adult -
Answer✔️✔️-1/3-1/2
How does exposure time for edentulous patients compare to dentulous
patients? - Answer✔️✔️-1/5 exposure time for edentulous
How does film speed correlate with definition and detail? - Answer✔️✔️-
faster film = lower definition and detail
How does kVp affect patient exposure - Answer✔️✔️-Higher kVp= low
pressure
How does packet placement differ between bisecting and paralleling? -
Answer✔️✔️--bisecting - packet is as close to tooth as possible, but not
parallel
-parallel - packet is parallel to tooth, further away
How does radiation affect cells? - Answer✔️✔️-It causes damage to living
cells. Ionization.
How does reducing exposure to the patient benefit the operator? -
Answer✔️✔️-The less the patient is exposed, the less the operator is exposed
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