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Duplicate of DH 11 Final Review
Duplicate of DH 11 Final Review
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Answers
1
Which of the following solutions; functions to reduce the silver halide crystals to black metallic silver?
sodium thiosulfate
sodium carbonate
hydroquinone-elon
distilled water
2
The “S” in the mnemonic SLOB stands for:
shift
same
some
simple
3
What is used to explain how distance affects the intensity of the x-ray beam?
voltage
half-value layer
inverse square law
milliamperage
4
Which of these is
NOT
a characteristic of pulp stones?
asymptomatic, no treatment necessary
round cylindrical radiolucencies in the pulp chamber
round cylindrical radiopacities
calcifications in pulp chambers or canals
5
Which of the following
does not
cause film fog in developed radiographs?
outdated films
underexposure
improper safelighting
light leak in the darkroom
6
Identify the maximum permissible dose (MPD) of an occupationally exposed person:
0.03 Sv/ year (3.0 rem/year)
0.05 Sv/year (5.0 rem/year)
0.01 Sv/year (1.0 rem/year)
0.02 Sv/year (2.0 rem/year)
7
Radiation injuries that are not seen in the person irradiated but that occur in
future
generations
are termed:
long-term effects
short-term effects
somatic effects
genetic effects
8
Describe what type of caries is present in this intraoral image?
incipient caries
occlusal caries
cervical burnout
rampient caries
9
What is the definition of asepsis is:
microorganism capable of causing disease
waste that consists of blood and sharps
the absence of pathogens or disease-causing microorganisms
instrument that contacts but does not penetrate bone
10
What is the negatively charged particle responsible for producing dental x-rays?
neutron
ion
proton
electron
11
Which of the following is the location in which thermionic emission occurs?
positive cathode
negative anode
negative cathode
positive anode
12
What is the most susceptible to ionizing radiation?
nerve tissue
muscle tissue
small lymphocyte
bone tissue
13
The
maximum
diameter of the collimated x-ray beam as it exits the PID is:
3.25 inches
2.75 mm
2.75 inches
2.25 inches
14
What is the ideal
manual
processing developer temperature that will produce optimal radiographic imagery?
98 degrees F
58 degrees F
68 degrees F
71 degrees F
15
Identify the normal anatomy on the intraoral radiographic image?
medium palatine suture
maxillary sinus cavity
zyomatic process
insive forman
16
Is demonstrating receptor placement to prevent prevent stimulation of the gag reflex?
False
True
17
Identify the radiolucent anatomic landmark:
lateral fossa
nasal septum
external oblique ridge
maxillary tuberosity
18
Which statement best describes the below image:
Target lesion
Ground glass lesion
Focal opacity
Multi-focal confluent lesion
19
Which of these goals is
NOT
the standard of care in dental radiography?
patient education
operator efficiency
the patient is responsible for knowing their exact MPD at each visit
patient protection
20
Which of the following is
NOT
a basic concept of digital radiography:
the absorbed dose to the patient is significantly lower
standard dental film used to keep the cost down
no processing is required
result is displayed on a computer screen
21
Does increasing the kVp result in a low contrast?
True
False
22
Is their radiographic changes in gingivitis?
True
False
23
Is a “reverse smile line” seen on the panoramic image because the patient’s is tipped down?
True
False
24
Suggestions to prevent stimulation of the gag reflex include:
Placing the receptor in the molar region first
Sliding the receptor along the palate
Demonstrating receptor placement
Waiting for 2 minutes before exposing each receptor
25
Any leaks of white light into the darkroom will cause:
film reticulation
film fogging
underexposed films
overdeveloped films
26
Identify the
false
statement about duplicating film:
emulsion is only on one side of the film
duplicating film is used in the darkroom
duplicating film is used in an area where it is exposed to radiation
the film can be affected by heat, humidity and radiation
27
Is this lesion identified as a Multilocular radiolucent lesion ?
True
False
28
Is this leasion an unilocular and radiolucent with non-corticated border?
True
False
29
Is an ion an atom that has
lost
an electron?
False
True
30
In dental radiography, the quality of the x-ray beam is controlled by:
kVp
mA
source-to-film distance
exposure time
31
What is visably seen in a irradiated person producing ill-health?
somatic effects
short-term effect
genetic effects
long-term effects
32
Which of the following accounts for 70% of all the x-ray energy produced at the anode?
Coherent scatter
Characteristic radiation
Compton scatter
General radiation
33
Collimation is accomplished by the use of:
an aluminum filter
tungsten target
a lead plate
lead apron
34
The portion of a processed radiograph that appears dark or black is termed:
radiolucent
radiopaque
dense
transparent
35
What is the earliest sign of decay?
pain in the area
hole or cavity
dark stained tooth
white spot
36
On a panoramic image the zygomatic process of the maxilla appears as a _____-shaped radiopacity.
U
J
Y
Both U and J
37
Identify the film that
includes
the lingual foramen:
maxillary canine
mandibular premolar
mandibular incisor
mandibular canine
38
Is Greater penetration of x-rays obtained with increased kVp?
True
False
39
The
appearance
of most radiolucent lesions can be classified as either
unilocular
or
multilocular
?
True
False
40
The best definition for Scatter radiation is?
none of the above
radiation deflected from its path by the interaction with matter
radiation that is created when x-rays come into contact with matter
radiation that exits the tubehead
41
Identify the normal anatomy on the intraoral radiographic image?
submandibular fossa
mental ridge
hyoid
nutrient canals
42
On a panoramic image the
incisive foramen
appears as a small, ovoid or round area located:
Near the apex of the mandibular first premolar
Inferior to the orbit
Between the roots of the maxillary central incisors
Superior to the maxillary sinuses
43
Which best defines hypercementosis?
seen below apices of non-vital teeth
seen below apices of non-vital teeth with a history of pulpitis
excess deposition of cementum on root surfaces
mass of granular tissue