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DENTAL RADIOLOGY REVIEW ACTUAL EXAM QUESTIONS AND ANSWERS 100% CORRECT | NEW UPDATE
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DENTAL RADIOLOGY REVIEW ACTUAL EXAM QUESTIONS AND ANSWERS 100% CORRECT | NEW UPDATE
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DENTAL RADIOLOGY REVIEW ACTUAL EXAMQUESTIONS AND ANSWERS 100% CORRECT |
NEW UPDATE 2024-2025
Describe the uses of dental imaging. - ANSWER 1. Detect lesions, diseases &
conditions of the teeth
2. Confirm or classify suspected disease
3. Localize lesions or foreign objects
4. Provide info during dental procedures
5. Eval growth & development
6. Illustrate changes secondary to caries, periodontal disease & trauma
7. Document condition of a patient at a specific point and time
8. Aid in the development of a clinical tx plan
Describe the discovery of x-radiation. - ANSWER The First X-ray, 1895. ... At the
end of the 19th century, while studying the effects of passing an electrical current
through gases at low pressure, German physicist Wilhelm Röntgen accidentally
discovered X-rays—highly energetic electromagnetic radiation capable of
penetrating most solid objects
Who was the first person to make practical use of x-ray in dentistry? - ANSWER
C. Edmund Kells in 1896.
Explain what happens during ionization. - ANSWER When electrons are
removed from the orbital shells of electrically stable atoms through collisions with
x-ray photons
,Describe the properties of x-radiation. - ANSWER X-ray are a form of energy
that can penetrate matter. X-rays belong to a group classified as electromagnetic
radiation. Visible light, radar, radio, and television are waves that are also
classified as electromagnetic radiation. The shorter the wavelength of the x-ray
the great is its energy. Bc of their high energy short wavelengths can penetrate
matter more easily than longer wavelengths making shorter wavelengths useful
What are the primary components of a dental x-ray machine? - ANSWER
Tubehead, Extension arm,and the control panel
Label the parts of the dental x-ray tubehead and tube and understand what each
part contributes to the production of x-rays. - ANSWER Position indicator
device-this is placed against the persons face a
extension arm- moves and turns 360 degrees
control panel- to operate several tubehead located in separate rooms
What is usually found on a control panel? - ANSWER master switch, indicator
light, selector buttons, exposure button
Explain how x-rays are produced. - ANSWER The current travels from the
control panel to teh tubehead through electrical wires in the extension arm
the current travels through the step down transformer to the filament of the
cathode
the filament circuit uses the 3 to 5 volts to heat the tungsten filament in the
cathode portion of the x-ray tube
after exposure is clicked the electrons in the cloud are shot across the x-ray tube
to the anode
the electrons speed fro the cathode to anode
, the heat is carried away from the coper stem and is absorbed
travel through unleaded glass window
x-ray beam then travels through the collimator
During the production of x-ray, how much energy is lost as heat? - ANSWER
99% lost at heat
What are the three types of radiation? - ANSWER alpha particles, beta
particles, gamma rays
Identify the range of kilovoltage and milliamperage required for dental
radiography. - ANSWER 7-15 mA
Explain what the term radiolucent means. - ANSWER Radiolucent-dark .
Permeable to one or another form of radiation, such as X-rays. Radiolucent
objects do not block radiation but let it pass.
Explain what the term radiopaque means. - ANSWER Radiopaque-light
Structures that are dense and resist the passage of x rays
Describe the effect of the kilovoltage on the quality of the x-ray beam. -
ANSWER Higher kilovoltage produces more penetrating x-rays and lower
radiographic contrast.
Describe how the milliamperage affects the quality of the x-ray beam. -
ANSWER As the quantity of x-rays is increased (mAs), the exposure to the
image receptor proportionally
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