Dental Radiology Final Exam Review
CORRECT 100%
What are the cells most sensitive to ionizing chambers? - ANSWER Reproductive.
What is the best type of x-ray to penetrate body tissue? - ANSWER Short wavelength,
high frequency, and hard rays.
Is an exposed x-ray film packet covered with a plastic barrier envelope considered to be
contaminated? - ANSWER Yes.
Before seating the dental patent it is necessary to cover which items with disposable
barriers? - ANSWER Tube head, head rest, controls, exposure button. (The stuff you're
gonna touch after you made contact with the mouth).
The dental assistant must utilize which item(s) of personal protective equipment (PPE)
when exposing films? - ANSWER Full PPE's. Gloves, mask, gown, goggles.
Proper collimation for the film size and focal-film distance will have what effect? -
ANSWER Reduce radiation to the patient.
Where can information and instructions for proper disposal of x-ray processing solutions
be found? - ANSWER SDS (Formerly known as MSDS) - (Material) Safety Data Sheet.
What are the x-rays at the center of the primary beam called? - ANSWER Central Ray.
A test for quality control relative to manual processing may be accomplished utilizing
what? - ANSWER Step wedge.
X-ray processing tanks are considered secondary containers, and according to OSHA
(Occupational Safety and Health Administration) standards what must be done? -
ANSWER Must be labeled. All information must be on the secondary label (such as the
hazards).
The quality, or penetrating power, of secondary radiation is more or less than primary
radiation? - ANSWER Less.
The time period between the effects of cumulative radiation and visible tissue damage is
called what? - ANSWER Latent PERIOD.
Which extra oral film is used to visualize the sinus? - ANSWER Water's View.
Which of the following statements is true when loading the film into the cassette before
exposure (in extra oral radiography)? - ANSWER Must be done in the darkroom.
, To avoid exposure to secondary radiation, the operator should stand where? -
ANSWER At least 6 feet away. Behind a barrier. Not directly behind the beam nor in
front of it.
The dental assistant's goal in radiation protection is zero occupational exposure. How is
this accomplished? - ANSWER ACCOMPLISHED:
Standing 6 feet away.
Shielded area.
Not holding film.
NOT ACCOMPLISHED:
Wearing x-ray badge. This will NOT protect you against radiation.
After each use, the lead lap apron must be stored in a specific way, what is it? -
ANSWER Hung. Never fold or crinkle.
The best technique for reducing the radiation exposure to both patient and operator is
the use of what? - ANSWER Fast films.
All the the following tissues are radiopaque EXCEPT:
a.) Alveolar bone
b.) enamel
c.) pulp chamber and canals.
d.) cortical plate. - ANSWER c.) pulp chamber and canals.
What is the basic principle of the bisecting the angle technique? - ANSWER The central
ray has to be directed at an imaginary line that bisects the tooth and the film.
When taking a full-mouth series of intramural x-rays, the sagittal plane of the patient's
head should be oriented how? - ANSWER Perpendicular to the floor. (T)
Vertical angulation in the bisecting technique for the same radiograph can differ in
patients because of... - ANSWER anotomic differences (anatomy).
What is a latent image? - ANSWER An image that's been exposed and are composed
of energized silver halide crystals.
Does not show up right away.
In the paralleling technique, a device used to hold the film in the patient's mouth is
called what? - ANSWER Film holder (XCP)
Black lines across the film may be the result of what? - ANSWER Bent film.
Blurred films can result from what? - ANSWER 1. Patient movement.
2. Tubehead movement.
CORRECT 100%
What are the cells most sensitive to ionizing chambers? - ANSWER Reproductive.
What is the best type of x-ray to penetrate body tissue? - ANSWER Short wavelength,
high frequency, and hard rays.
Is an exposed x-ray film packet covered with a plastic barrier envelope considered to be
contaminated? - ANSWER Yes.
Before seating the dental patent it is necessary to cover which items with disposable
barriers? - ANSWER Tube head, head rest, controls, exposure button. (The stuff you're
gonna touch after you made contact with the mouth).
The dental assistant must utilize which item(s) of personal protective equipment (PPE)
when exposing films? - ANSWER Full PPE's. Gloves, mask, gown, goggles.
Proper collimation for the film size and focal-film distance will have what effect? -
ANSWER Reduce radiation to the patient.
Where can information and instructions for proper disposal of x-ray processing solutions
be found? - ANSWER SDS (Formerly known as MSDS) - (Material) Safety Data Sheet.
What are the x-rays at the center of the primary beam called? - ANSWER Central Ray.
A test for quality control relative to manual processing may be accomplished utilizing
what? - ANSWER Step wedge.
X-ray processing tanks are considered secondary containers, and according to OSHA
(Occupational Safety and Health Administration) standards what must be done? -
ANSWER Must be labeled. All information must be on the secondary label (such as the
hazards).
The quality, or penetrating power, of secondary radiation is more or less than primary
radiation? - ANSWER Less.
The time period between the effects of cumulative radiation and visible tissue damage is
called what? - ANSWER Latent PERIOD.
Which extra oral film is used to visualize the sinus? - ANSWER Water's View.
Which of the following statements is true when loading the film into the cassette before
exposure (in extra oral radiography)? - ANSWER Must be done in the darkroom.
, To avoid exposure to secondary radiation, the operator should stand where? -
ANSWER At least 6 feet away. Behind a barrier. Not directly behind the beam nor in
front of it.
The dental assistant's goal in radiation protection is zero occupational exposure. How is
this accomplished? - ANSWER ACCOMPLISHED:
Standing 6 feet away.
Shielded area.
Not holding film.
NOT ACCOMPLISHED:
Wearing x-ray badge. This will NOT protect you against radiation.
After each use, the lead lap apron must be stored in a specific way, what is it? -
ANSWER Hung. Never fold or crinkle.
The best technique for reducing the radiation exposure to both patient and operator is
the use of what? - ANSWER Fast films.
All the the following tissues are radiopaque EXCEPT:
a.) Alveolar bone
b.) enamel
c.) pulp chamber and canals.
d.) cortical plate. - ANSWER c.) pulp chamber and canals.
What is the basic principle of the bisecting the angle technique? - ANSWER The central
ray has to be directed at an imaginary line that bisects the tooth and the film.
When taking a full-mouth series of intramural x-rays, the sagittal plane of the patient's
head should be oriented how? - ANSWER Perpendicular to the floor. (T)
Vertical angulation in the bisecting technique for the same radiograph can differ in
patients because of... - ANSWER anotomic differences (anatomy).
What is a latent image? - ANSWER An image that's been exposed and are composed
of energized silver halide crystals.
Does not show up right away.
In the paralleling technique, a device used to hold the film in the patient's mouth is
called what? - ANSWER Film holder (XCP)
Black lines across the film may be the result of what? - ANSWER Bent film.
Blurred films can result from what? - ANSWER 1. Patient movement.
2. Tubehead movement.
