Dental Radiology Final Exam Latest Update
With All Questions And Answers
1) All ionizing radiations are harmful and produce biologic changes in living tissue.
2) The amount of radiation used in dental radiography is small, but biologic
damage does occur. - ---✔✔✔ANSWER----a. Both statements are true.
1) Density is the overall darkness or blackness of a film. 2) When the kilovolt peak
is increased while other exposure factors remain constant, the resultant film
exhibits a decreased density and appears lighter. - ---✔✔✔ANSWER----c.
The first statement is true; the second statement is false.
1) Radiation is the emission and propagation of energy through space or a
substance in the form of waves or particles. 2) Radioactivity can be defined as the
process by which certain unstable atoms or elements undergo spontaneous
,disintegration, or decay, in an effort to attain a more balanced nuclear state. - ---
✔✔✔ANSWER----a. Both statements are true.
According to the basic principles of the paralleling technique, the film is placed in
the mouth _____ to the long axis of the tooth being radiographed, and the central
ray of the x-ray beam is directed _____ to the film and long axis of the tooth. - ---
✔✔✔ANSWER----a. parallel; perpendicular
According to the text, "_____ is one of the most important uses of dental
radiographs." - ---✔✔✔ANSWER----b. detection
A cone cut occurs when: - ---✔✔✔ANSWER----c. The PID was not properly
aligned with the periapical film holder.
All crowns and roots of the first, second, and third molars, including the apices,
alveolar crests, contact areas, surrounding bone, and tuberosity region, must be
seen on the _____ radiograph. - ---✔✔✔ANSWER----b. maxillary molar
Aluminum filters are used to remove _____-energy, _____ wavelength x-rays. - --
-✔✔✔ANSWER----a. low; longer
An underexposed film results from: - ---✔✔✔ANSWER----a. Inadequate
exposure time
, An unexposed film appears: - ---✔✔✔ANSWER----a. Clear
A radiograph is defined as: - ---✔✔✔ANSWER----b. A picture on film
produced by the passage of x-rays through an object or body.
A radiograph should not be referred to as a(n): - ---✔✔✔ANSWER----c. X-
ray
A radiograph that has _____ is said to have high contrast. - ---
✔✔✔ANSWER----d. very dark areas and very light areas
Because metallic restorations absorb x-rays, the area of the film that corresponds
to their location remains unexposed, and the metallic restorations appear
completely _____ on a dental radiograph. - ---✔✔✔ANSWER----c.
radiopaque
Cellular injuries following the latent period may include (1) cell death, (2)
cessation of mitotic activity, and/or (3) abnormal mitotic activity. - ---
✔✔✔ANSWER----a. 1, 2, 3
Dental caries appears _____ because the area of the tooth with caries is _____
dense than surrounding structures. - ---✔✔✔ANSWER----d. radiolucent;
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With All Questions And Answers
1) All ionizing radiations are harmful and produce biologic changes in living tissue.
2) The amount of radiation used in dental radiography is small, but biologic
damage does occur. - ---✔✔✔ANSWER----a. Both statements are true.
1) Density is the overall darkness or blackness of a film. 2) When the kilovolt peak
is increased while other exposure factors remain constant, the resultant film
exhibits a decreased density and appears lighter. - ---✔✔✔ANSWER----c.
The first statement is true; the second statement is false.
1) Radiation is the emission and propagation of energy through space or a
substance in the form of waves or particles. 2) Radioactivity can be defined as the
process by which certain unstable atoms or elements undergo spontaneous
,disintegration, or decay, in an effort to attain a more balanced nuclear state. - ---
✔✔✔ANSWER----a. Both statements are true.
According to the basic principles of the paralleling technique, the film is placed in
the mouth _____ to the long axis of the tooth being radiographed, and the central
ray of the x-ray beam is directed _____ to the film and long axis of the tooth. - ---
✔✔✔ANSWER----a. parallel; perpendicular
According to the text, "_____ is one of the most important uses of dental
radiographs." - ---✔✔✔ANSWER----b. detection
A cone cut occurs when: - ---✔✔✔ANSWER----c. The PID was not properly
aligned with the periapical film holder.
All crowns and roots of the first, second, and third molars, including the apices,
alveolar crests, contact areas, surrounding bone, and tuberosity region, must be
seen on the _____ radiograph. - ---✔✔✔ANSWER----b. maxillary molar
Aluminum filters are used to remove _____-energy, _____ wavelength x-rays. - --
-✔✔✔ANSWER----a. low; longer
An underexposed film results from: - ---✔✔✔ANSWER----a. Inadequate
exposure time
, An unexposed film appears: - ---✔✔✔ANSWER----a. Clear
A radiograph is defined as: - ---✔✔✔ANSWER----b. A picture on film
produced by the passage of x-rays through an object or body.
A radiograph should not be referred to as a(n): - ---✔✔✔ANSWER----c. X-
ray
A radiograph that has _____ is said to have high contrast. - ---
✔✔✔ANSWER----d. very dark areas and very light areas
Because metallic restorations absorb x-rays, the area of the film that corresponds
to their location remains unexposed, and the metallic restorations appear
completely _____ on a dental radiograph. - ---✔✔✔ANSWER----c.
radiopaque
Cellular injuries following the latent period may include (1) cell death, (2)
cessation of mitotic activity, and/or (3) abnormal mitotic activity. - ---
✔✔✔ANSWER----a. 1, 2, 3
Dental caries appears _____ because the area of the tooth with caries is _____
dense than surrounding structures. - ---✔✔✔ANSWER----d. radiolucent;
less
