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DENTAL RADIOGRAPHY MIDTERM EXAM | 64 QUESTIONS AND ANSWERS 100% CORRECT | UPDATED
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DENTAL RADIOGRAPHY MIDTERM EXAM | 64 QUESTIONS AND ANSWERS 100% CORRECT | UPDATED
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DENTAL RADIOGRAPHY MIDTERM EXAM | 64QUESTIONS AND ANSWERS 100% CORRECT |
UPDATED 2024-2025
The dentist who is credited with the first practical use of radiographs in dentistry -
ANSWER Edmond C. Kells
the _____ the wavelengths of the x-rays, the greater their energy and their
usefulness - ANSWER the shorter the wavelengths
The component of the x-ray machine that functions in positioning the tube head is
_______ - ANSWER the extension arm
The heart of the x-ray generating system is called - ANSWER the x-ray tube
the type of radiation that is created when the primary x-ray beam interacts with
matter - ANSWER Secondary Radiation
What structures appear radiolucent on an radiograph? - ANSWER soft tissue,
air spaces, abscesses, tooth decay, and the dental pulp
What structures appear radiopaque on an radiograph? - ANSWER metal
restorations, composite resins, implants, enamel
What term _____ is used to describe areas that appear dark on the image -
ANSWER Radiolucent
, What term _____ is used to describe areas that appear white or light gray -
ANSWER Radiopaque
The range of shades of gray between black and white on an image is called: -
ANSWER Contrast
What controls the degree of density (blackness) of an image? - ANSWER mAs
What cells are the most radio-sensitive? - ANSWER small lymphocytes, bone
marrow, and reproductive cells
What cells are the least radio-sensitive? - ANSWER the salivary gland, thyroid
gland, kidney, muscle, and nerve tissues
When do a thyroid collar and a lead apron have to be used? - ANSWER on all
patients for all exposures (except Pano's - thyroid collars are not recommended)
What is the recommended safe distance for assistance to be away from radiation
exposure? - ANSWER 6 feet
What part of the x-ray machine provides the electrons that produce x-rays? -
ANSWER the cathode
If you change the exposure time of the x-ray unit, what is affected? - ANSWER
the number of x-rays that are produced
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