Dental Radiology Final Exam with correct answers 2024
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Course
Dental Radiology Fi
Institution
Dental Radiology Fi
What is a radiograph? correct answers A picture on film produced by the passage of x-rays through an object or body.
What is one of the main reasons that radiographs are considered an important and necessary part of patient care? correct answers Many dental diseases are typically discovered on...
What is a radiograph? correct answers A picture on film produced by the passage of x-
rays through an object or body.
What is one of the main reasons that radiographs are considered an important and
necessary part of patient care? correct answers Many dental diseases are typically
discovered only through the use of dental radiographs.
What does the nucleus of an atom contain? correct answers Protons and neutrons
What are photons? correct answers - bundles of energy without mass or weight
- bundles of energy that travel at the speed of light.
- they are a component of the particle concept of electromagnetic radiation.
When contrasted with the use of 65 kV to 75 kV for dental x-rays, the use of 85 kV to
100 kV produces _________ x-rays and __________ wavelengths correct answers
The use of 85 kV to 100 kV for dental x-rays produces more penetrating dental x-rays
with shorter wavelength.
What does kVp represent? correct answers The maximum or peak voltage of an
alternating current.
When low kilovoltage peak settings are used (65 kVp to 70 kVp), a film with ____
contrast will result. correct answers high contrast
The quantity of the x-rays produced is controlled by what factor? correct answers mAs
(milliamperage)
An increase in density comes from an increase in what other factor? correct answers
kVP or mAs
According to the inverse square law, the intensity of radiation is ____ proportional to the
____ from the source of radiation. correct answers inversely; square of the distance
According to the inverse square law, if the length of the PID is doubled, the resultant
beam is ____ as intense. correct answers one quarter
What feature do aluminum filters provide to the tube head? correct answers Reduce
the intensity of the x-ray beam.
____ refers to the quantity of radiation received or the total amount of radiation energy
absorbed. correct answers Total Dose
, Which of the following are considered to be radioresistant tissues? correct answers A.
Bone Marrow
B. Salivary Glands
C. Lymph Tissue
D. Intestines
Salivary glands
Which are the critical organs exposed during dental radiographic procedures in the
head and neck region? correct answers skin, thyroid gland, lens of the eye, and bone
marrow.
Which unit of measurement is the traditional unit of dose? correct answers the radiation
absorbed dose (RAD)
What modification in technique will reduce patient exposure to radiation during dental
radiographic procedures? correct answers A longer source-to-film distance will reduce
patient exposure to radiation during dental radiographic procedures.
The "Guidelines for Prescribing Dental Radiographs" state that: correct answers
Dentulous adults should have posterior bite-wing examinations at 12- to 36-month
intervals and that The recommendations do not need to be altered because of
pregnancy.
What is inherent filtration in the dental x-ray tube head? correct answers Includes
filtration that takes place when the primary beam passes through the glass window of
the x-ray tube, the insulating oil, and the tubehead seal.
What does the collimator do? correct answers Restricts the size and shape of the x-ray
beam.
When is it recommended to use the lead apron? correct answers for intraoral films and
extraoral films
On some dental x-ray machines, only the ____ can be altered; the other parameters are
preset by the manufacturer. correct answers exposure time
How is a film badge work by the operator? correct answers usually at waist level
Radiation legislation varies greatly from state to state. For example, in some states a
dental radiographer must successfully complete a radiation safety examination before
he or she may expose dental x-rays.
a. Both statements are true.
b. Both statements are false.
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