Dental Radiology Exam Questions with Correct Answers
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Course
Dental Radiology
Institution
Dental Radiology
Dental Radiology Exam Questions with Correct Answers
How big should the x-ray beam be? - Answer-2.75 inches in diameter
4 characteristics that make x-rays important to dentistry - Answer-~penetrate materials that stop or reflect light
~can be recorded and seen on a photographic film
~can ca...
Dental Radiology Exam Questions
with Correct Answers
How big should the x-ray beam be? - Answer-2.75 inches in diameter
4 characteristics that make x-rays important to dentistry - Answer-~penetrate materials
that stop or reflect light
~can be recorded and seen on a photographic film
~can cause biological changes and even kill
~cause certain chemical crystals to give off light
4 other names for the cathode - Answer-wire coil
tungsten coil
filament
negative component
4 other names for the anode - Answer-target
tungsten target
wolfram target
positive component
2 other names for the x-ray tube - Answer-vacuum tube
glass envelope
What does PID stand for and proper cone? - Answer-postion indicating device
lead lined and open ended
What's the best type of cone to use? What cone can't you use? - Answer-rectangular 16
inches
never a plactic pointed cone
What terms refer to cone length? - Answer-focal film distance FFD
target film distance TFD
What switch generates x-rays(3 names)? - Answer-activating button
exposure button
deaad man switch
What does the length of the timer depend upon (6 things)? - Answer-the unit
type of film or digital sensor
kVp/mA
, cone length
density of tissues
What is radiation biology? - Answer-science that deals with the effects of radiation on
living tissue
ionizing radiation - Answer-the breaking apart of charged ions within the cells
results in damage to the tissues
Define chronic exposure or effects - Answer-With higher doses of radiation there will be
noticeable change
Which cells are the most sensitive to radiation? - Answer-rapidly multiplying and dividing
cells
Examples of sensitive cells(8): - Answer-reproductive cells
hair and nails
young blood cells-bone marrow
skin
eyes
thyroid gland
lymphoid organs
fetal cells
When is the most dangerous time for a pregnant women to have x-rays and the safest
time? - Answer-1st and 3rd trimester
2nd trimester
Examples of less sensitive cells(8): - Answer-adult bone
mature blood cells
muscles and nerves
salivary glands
lungs, kidneys, and liver
What is the first symptom of over exposure to radiation? - Answer-erythema- reddening
of the skin
What is radiation caries? - Answer-radiation treatment leads to thickening of the saliva
whcih contains more bacteria in the mouth leaving the person more inclined to develop
cavities
latent period - Answer-time lapse from x-ray exposure until damage is seen
somatic effects - Answer-effects from radiation that effect all cells but reproductive cells
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