What is a good diagnostic quality image for endodontics?

one that allows you to see 5 mm beyond the apex

What is the purpose of bitewing images?

to view the interproximal surfaces

Which of the following is not an advantage of extraoral radiographs?

they show a close up image of something

Why is an exposure sequence important?

so all areas are included & images do not have to be retaken

When are occlusal radiographs indicated?

to show a wide view of the arch

A focal trough is ________________.

an imaginary horseshoe shaped area used for jaw placement

Dental radiographs are the property of the?

dentist exposing the radiograph

What federal act requires persons who take radiographs to be trained and certified?

Consumer-Patient Radiation Health and Safety Act

X-radiation flashback on the x-ray film is caused by?

necklaces, earrings, and glasses

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Radiology

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Questions 143

Answers

1
What is a good diagnostic quality image for endodontics?
one that allows you to see interproximally
one that allows you to see the incisal edge
one that allows you to see 5 mm beyond the apex
one that allows you to see an impaction
2
Under state laws, who is allowed to prescribe dental images?
radiologist
dentist
physician
specialist
3
Should you use a film cassette that has scratches?
no
yes
4
An early warning indicator of x-ray dermatitis is?
loss of hair
feeling of general weakness
nausea
reddening of the skin
5
Underdeveloping can cause the film to be?
blank
fogged
dark
light
6
In the bisecting angle technique, how is the image receptor placed in relation to the teeth?
on the opposite side of the arch
parallel
far from the teeth
close to the teeth
7
A panoramic radiograph should not be used to?
chart caries
detect mandibular fractures
locate impacted teeth
generally evaluate the mouth
8
Results of careless angulation of the x-ray tube include a?
white light fogging
web like appearance
cone cut
blurred image
9
What low-intensity light is composed of long wavelengths in the red-orange spectrum?
safelight
intensifying screen
filter
x-rays
10
A structure that appears light on a processed radiograph is termed?
density
radiolucent
contrast
radiopaque
11
How do you sterilize sensors?
vapor
moisture
you cannot sterilize sensors
heat
12
What size film is used for occlusal radiographs?
3
4
5
2
13
What is the purpose of bitewing images?
to view the interproximal surfaces
to view the occlusal third of the teeth
to view the apices of the teeth
to view the gingival third of the teeth
14
Name the types of extra oral film cassettes.
flexible and rigid
flexible
rigid
expandable
15
How far from the patient's location must an operator stand to escape the most harmful x-rays?
6 feet
10 feet
4 feet
12 feet
16
The use of a fast speed film?
prevents a partial image
helps prevent blurring
prevents a thin image
keeps you awake
17
Which of the following can cause "ghost images" on a panoramic image?
earrings
necklaces
eyeglasses
all of them
18
What error occurs when the horizontal angulation is incorrect?
blurring
herringbone pattern
overlapping
elongation
19
How can you tell when the fixer is losing its strength?
films take longer to clear
films are black
films appear light
films appear dark
20
The maximum permissible dose of radiation for occupationally exposed persons is_____________.
5.0 rems/year
15 rems/year
50 rems/yar
0,05 rems/year
21
What converts x-ray energy into visible light?
intensifying screen
cardboard
aluminum foil
collimator
22
What type of film holder can be used in the bisecting angle technique?
BAI
stabe
EeZee grip
all of them
23
To accurately determine the temp of the processing solutions, the thermometer should be in the?
area above the developing tank
developer
fixer
wash water
24
Which of the following is not an advantage of extraoral radiographs?
they show a close up image of something
they provide an overview of the skull and jaw
they minimize radiation exposure for the patient
they prevent the patient from gagging
25
What metal is used in the construction of the anode target?
lead
tungsten
copper
molybdenum
26
A raised button on a radiograph helps to?
mount the film
develop the film
place the film
speed the exposure
27
Exhausted developer will produce a ________ image.
partial
thin, faded
thin, shiny
fogged
28
Why is an exposure sequence important?
so all areas are included & images do not have to be retaken
so the operator will know how many films have been exposed
for proper mounting of film
to follow guidelines
29
The occlusal plane of the teeth should be placed in what relation to the floor during exposure?
at a right angle
parallel
perpendicular
vertical
30
What is the optimum temperature for the water in the manual processing tanks?
68 degrees F
72 degrees F
65 degrees F
75 degrees F
31
When are occlusal radiographs indicated?
to show a wide view of the arch
to detect interproximal decay
to view the apex
to view the sinus
32
Which of the following can occur when the vertical angulation is incorrect?
foreshortening
overlapping
elongation and foreshortening
elongation
33
Protection for the patient is provided by?
using a lead apron
all of them
using a lead thyrocervical collar
closing eyelids
34
Air bubbles clinging to the surface of the film in the developer?
causes a web-like appearance
all of them
shows up as a dark blotch
shows up as a white blotch
35
The name of the negative electrode inside the x-ray tube is the__________.
anode
cathode
photon
nucleus
36
A structure that appears dark on a processed radiograph is termed?
radiopaque
density
radiolucent
contrast
37
Indirect digital imaging involves the use of a(n)?
intraoral film
extraoral film
digital sensor
phosphor storage plate (PSP)
38
What vertical angulation should be used for bitewing images?
-10 degrees
+ 10 degrees
+ 15 degrees
- 15 degrees
39
Excessively dark radiographs may be caused by?
insufficient milliampere seconds
underdeveloping
excessive kilovoltage power
reversal of film placement
40
When mounting x-rays with the dot towards you, you are mounting as if you are?
standing to the patient's right
facing the patient
sitting on the patient's tongue
standing to the patient's left
41
Lead diaphragms must be small in the x-ray units because?
x-radiation is decreased
cone cutting is kept to a minimum
static electricity is avoided
it must cover all areas
42
A focal trough is ________________.
where the patient looks during the process
an earpiece used for positioning
an imaginary horseshoe shaped area used for jaw placement
the area where the patient bites down
43
Dental radiographs are the property of the?
dentist exposing the radiograph
consultant physician
patient
consultant dentist
44
Which patients should wear a lead apron and thyroid collar?
patients with a pacemaker
children
patients with lung cancer
all patients
45
The purpose of the collimator is to?
both b and c
restrict the size of the primary beam
reduce the exposure of the primary beam
filter the primary beam
46
X-ray operator protection regulations require that the operator?
must stand feet away from the tubehead
all of them
never hold the film or the patient
avoid primary, secondary, and scattered radiation
47
What federal act requires persons who take radiographs to be trained and certified?
Bill of Rights Act
Blood-Borne Pathogen Standard
Hazard Communication Standard
Consumer-Patient Radiation Health and Safety Act
48
The period of time between x-ray exposure and the appearance of symptoms is the____________.
exposure time
development
latent period
primary radiation
49
To protect x-ray film, store it in a container lined with?
acrylic
aluminum
lead
porcelain
50
X-radiation flashback on the x-ray film is caused by?
clothing contact
chewing gum
necklaces, earrings, and glasses
contact lens
51
Improper angulation when taking x-rays may result in?
elongation of image
overexposure
underexposure
blurred image
52
____________ is a system that is used to measure radiation.
the metric system
systeme internationale
both traditional or standard system & systeme internationale
the traditional or standard system
53
The radiograph is underexposed when?
the images are blurred
it is too dark
it has light and faint images
its contrast is streaked
54
What is the purpose of equipment monitoring?
determine amount of radiation produced during exposure
to record the amount of radiation that reaches a body
to record the amount of radiation a patient receives
to check for radiation leakage
55
What is the purpose of using a position indicator device (PID)?
to direct the x-ray beam
to increase the contrast on the radiograph
all of the above
to increase the density on the radiograph
56
Which side of the film faces toward the tube?
silver side
white side
envelope looking side
doesn't matter
57
A maxillary arch dental periodical radiograph can be identified by the?
tooth number
position of the teeth
sinuses packets
size of teeth
58
The image on the film before it is processed is the?
latent image
mirror image
contrast
density
59
Which of the following is a critical area in a quality control program?
film processing
patient consent
film mounting
used PPE
60
Who discovered x-rays?
G.V. Black
Pierre Fauchard
Horace Wells
W.C. Roentgen
61
Who legally owns a patient's dental images?
the physician
the dentist
the patient
the radiologist
62
What is the second step involved in manual processing of dental radiographs?
washing
rinsing
developing
fixing
63
What type of imaging is best for soft tissues of the temporomandibular joint?
cephalometric
panorex
cone beam computed tomography
digital x-ray examination
64
When would you need to duplicate a radiograph?
to send to an insurance company
to refer a patient to a specialist
to get a second opinion
send to insurance company & to refer patient to specialist
65
Why is it not recommended to have the patient hold the image receptor during exposure?
the patient receives unnecessary radiation
it does not meet with infection control standards
the DA must position the film or sensor properly
the patient's finger will get in the way of the image
66
When exposing films for a pediatric patient, what analogy can be use to describe the tube head?
space gun
alien machine
tubehead
camera
67
How do positioning instruments protect the patient from unnecessary radiation?
it speeds up the process
it filters the scatter radiation
it keeps the patient's hands and fingers from being exposed
it shows the correct teeth
68
An x-ray badge is a device to monitor?
radiation exposure
kilovolts
milliamperes
exposure time of x-rays
69
For partially edentulous patients, how can you modify the technique for using a bite block?
use a cotton roll
use the patient's partial denture
use a larger film or sensor
use a custom tray
70
Milliamperage controls which of the following?
only heating of the cathode
number of electrons going from the cathode to the anode
cooling of the anode
heating of the cathode and anode
71
What states that all exposure to radiation should be kept as low as reasonably achievable?
ALARA concept
patient's bill of rights
right to know law
dental assistant creed
72
What are quality control tests?
radiology certification
tests used to monitor equipment, supplies, & processing
national board examinations for dentists
specific tests that dental personnel must take and pass
73
What is the major advantage of automatic film processing?
it is sager
the quality of the radiograph is better
it saves time
it uses fewer chemicals
74
When should you check a box of film for freshness?
every monday morning
each time you open a new box
monthly
daily
75
Radiation that is passed on to future generations is the ____________.
genetic effect
exposure effect
somatic effect
cumulative effect
76
The purpose of the aluminum filter is to_______.
remove the high energy, short wavelength rays
restrict the size of the primary beam
reduce the exposure of the primary beam
remove the low energy, long wavelength rays
77
Which staff members need to be aware of the quality administration program?
all of them
dentist
dental assistant
dental hygienist
78
The name of the process for the harmful effects of x-rays is?
infrared rays
ionization
ultraviolet rays
radiation
79
To influence the exposure time of a dental x-ray, the operator must?
consider the number of gold restorations
measure the distance of the cone from the target
consider the diameter of the primary ray
patient must have a full compliment of teeth
80
What is the primary type of radiation produced in the dental x-ray tubehead?
tungsten radiation
roentgen radiation
bremsstrahlung radiation
bavarian radiation
81
A way to ensure that high quality diagnostic radiographs are produced is by having?
kodak approval
quality assurance
the best type of film
certified dental assistants
82
What is the minimum distance between safelight and the working area?
3 feet
4 feet
2 feet
1 foot
83
What is the minimum PPE the operator should wear while exposing radiographs?
mask
gloves
hair cover
eyewear
84
A radiography with a thin image is difficult to interpret and may be caused by?
too short of a developing time
an inaccurate timer
a faulty switch contact
developing solution that is too cold
85
What factor determines the penetrating quality of the x-ray beam?
exposure time
milliamperage
filament temperature
kilovoltage
86
Why are reference radiographs and a step wedge used?
to check the radiolucency and radiopacity
to check the processing technique
to check the densities and contrast
to check the absorbed dose
87
An ideal temperature of solutions used in processing dental radiographs is?
68-72 degrees F
56-60 degrees F
62-66 degrees F
74-78 degrees F
88
________ is the process by which electrons are removed from electrically stable atoms.
ionization
roentgen
physics
radiation
89
The most hazardous radiation to the operator is?
scattered
secondary
leakage
primary
90
Are manual processing solutions and automatic processing solutions interchangeable?
no
yes
91
During the production of x-rays, how much energy is lost as heat?
25%
50%
99%
5%
92
What film size is used in the occlusal technique for an adult?
1
2
3
4
93
What type of technology is used in panoramic units?
digital technology
conventional film based technology
both of them
94
A film is elongated by?
insufficient vertical angulation
incorrect horizontal positioning
the bending of film
insufficient horizontal angulation and positioning
95
What mark on the face is used for maxillary anterior occlusal film?
bridge of nose
trigs of ear to ala of nose
tip of nose
cantus of eye to ala of nose
96
The bitewing x-ray is designed to show the ________ areas.
interproximal
anterior
apical
posterior
97
The purpose of a grid is to____________.
reduce the amount of scatter radiation
hold the patient's head still
hold the film in place
increase the size of the image
98
What is the purpose of a quality administration program?
deals with who takes the x-rays in the office
deals with being compensated more for taking x-rays
deals with management of the quality assurance program
deals with credentialing of the quality assurance program
99
The organ(s) or tissue(s) most sensitive to ionizing radiation?
the dermal tissue
reproductive organs
brain tissue
bone marrow tissue
100
Poor rinsing of x-ray films causes?
spots to form on the film
the images to be light
the film to be clear
the images to be elongated
101
Why is it important for the DA to recognize normal anatomic landmarks?
for quality control
for identification of the patient
for mounting of x-ray films
for diagnostic purposes
102
What is the purpose of personnel monitoring?
to check for radiation leakage
to record the amount of radiation that is produced
to record the amount of radiation a patient receives
to record the amount of radiation the operator receives
103
Describe a basic style of film holder.
square with adhesive on the back
hemostat device
bite block w/ backing plate & slot for film sensor retention
resembles a clothespin
104
Which additional images no longer necessary to supplement when the new digital pano's are used?
all of the above
bitewing
periapical
occlusal
105
The primary components of a dental x-rays machine are the _________.
all of the above
PID
tubehead
extension arm
106
What is located on the x-ray machine control panel?
collimator
tubehead
filter
milliamperage (mA) selector
107
Covering of a radiograph film is?
silver acetate
silver bromide salts
potassium bromide
acetate base
108
The name of the positive electrode inside the x-ray tube is the__________.
nucleus
neutron
cathode
anode
109
Name a component of an intraoral film.
plastic
film emulsion
aluminum foil
alginate
110
What changes must be made in the exposure factors, for a pediatric patient?
exposure factors must be increased
exposure factors must be reduced
no changes are made
depends on whether the patient is male of female
111
What technique is used for exposing dental images?
bisection of angle
parallel & bisection of angle
digressive
parallel
112
If the film is not fixed long enough, it will be?
clear
white
brittle
brownish
113
The first clinical sign of excessive exposure to radiation is?
nausea
erythema
edema
anorexia
114
Holding the x-ray tube when exposing film is not safe because?
film conning can occur
electric shock is possible
the tube does not confine radiation
film fogging takes place
115
For those who work with radiation, the maximum whole body dose considered permissible is?
100 mR/wk
1 mR/wk
10 mR/wk
0.1 mR/wk
116
What is the purpose of the coin test?
to check the processor
to check the x-ray machine
to check the safelight
to check the technique
117
Radiographs can be safely exposed to light during processing after?
following the final wash
developing
the first wash
fixing
118
What type of agreement is obtained before radiographs of a patient are taken?
dentist's signature
informed consent
liability agreement
medical approval
119
Who was the first person to make a dental radiograph?
G.V. Black
C. Edmund Kells
Horace Wells
Otto Walkhoff
120
What type of device is included on a panoramic unit?
hemostat
periodical film holder
cephalostat
bitewing holder
121
On new full-featured digital panoramic units, which can now be detected on a pano radiograph?
lesions in the mandible
interproximal caries
location of impacted teeth
all of them
122
If the sinus area is shown on the radiograph, it indicates the film is of the?
maxillary molar
TMJ
maxillary anteriors
mandibular molar
123
Occupational Safety and Health Agency (OSHA) requires each office must post?
Safety Data Sheets (SDS)
regulations for processing
a diagram of the x-ray area
instructions on how to take x-rays
124
The purpose of fixing film is to?
remove the affected silver salts
peel the emulsion from the base
remove the unaffected silver salts
soften the film
125
Where is the expiration date on a package of x-ray film?
on the package insert
outside the box
on the bar code
on each film
126
Which exposure should be the first for the posterior regions?
maxillary premolar
maxillary molar
mandibular premolar
mandibular molar
127
X-ray exposure to the patient is best reduced by using ______ film.
extraoral
radiatized
fast
intraoral
128
What precautions should not be taken when one is handling contaminated phosphor storage plates?
soaking the plates in a liquid sterilant
wiping saliva off when film is removed from mouth
placing films in a paper cup
wearing gloves
129
How often should processing solutions be replenished?
twice a year
daily
monthly
weekly
130
When you are exposing images, in which area of the mouth should you begin?
mandibular left
maxillary anterior
maxillary right
mandibular anterior
131
What exposure factor controls contrast?
distance
mA
time
kVp
132
Density is the ______________.
structure that appears dark on a processed radiograph
structure that appears light on a processed radiograph
overall darkness of a processed radiograph
overall lightness of a processed radiograph
133
What size film is used for posterior periodical radiographs on an adult patient?
0
1
2
3
134
What film size is recommended for a pediatric patient with all primary dentition?
1
0
3
2
135
What surfaced must be covered with a barrier?
no surfaces should be covered with a barrier
only surfaces in the darkroom
all surfaces
surfaces that are not easily cleaned and disinfected
136
Which exposure technique is recommended by the associations the AAOMS and ADEA?
dissection
bisection of angle
parallel
intersection
137
How often should processing solution be replenished?
daily
monthly
bimonthly
weekly
138
Another term for bite-wing x-rays is?
periapicals
interproximal
full mouth
panoramic
139
What are the types of radiation?
secondary
primary
all of them
scaller
140
Why is it important to avoid retakes?
insurance will not pay for retakes
to avoid wasting film
to avoid unnecessary radiation exposure
the dentist will deduct it from your pay
141
The most penetrating x-rays have?
soft rays
low frequencies
long wavelengths
short wavelengths
142
How should x-ray film be stored?
in a moist environment
in heat
away from light
submersed in chemicals
143
Which of the following is a component of a panoramic unit?
all of them
notched bite-block
chin rest
forehead rest

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