SC DENTAL RADIOGRAPHY STUDY GUIDE QUIZ|
DENTAL RADIOGRAPHY STUDY GUIDE EXAM
QUESTIONS WITH CORRECT ANSWERS NEW
MODIFIED TESTED AND APPROVED!!!
What makes it possible to produce duplicate sets of radiographs without
additional radiation or the need to use a duplicating machine? --ANSWER--
Using double film packets allows 2 films to be exposed at one time, so there is a
duplicate of the film without need of additional x-ray exposure or duplication.
What size film is usually used for occlusal radiographs? --ANSWER--Size 4
film is appropriate for occlusal radiographs but is too large for other intraoral
radiographs.
What use is a size 2 film most appropriate for? --ANSWER--Posterior PAs and
Adult BWX are appropriate uses for size 2 film.
What technique places film in line with the long axis of the teeth to be
radiographed? --ANSWER--Paralleling places the film parallel with the long
axis of the teeth.
When using the paralleling technique, in what direction is the x-ray beam
aimed? --ANSWER--The x-ray beam is aimed at 90 degrees when using the
Page 1 of 106
,parallel technique. This is because the film is parallel with the long axis of the
tooth, allowing the beam to travel straight ahead.
Which of the following requires the use of a film-holding instrument? --
ANSWER--Paralleling techniques require the use of a film-holding instrument
in order to maintain the position of the film with the long axis of the tooth.
When placing a film in a PID, which of the following is correct? --ANSWER--
The raised dot should face the PID and toward the occlusal surface. This
identifies the proper position of the film as well as prevents the raised dot from
being over any structures that may need to be seen on the x-ray.
What is the position on the patient's face where the central x-ray beam is aimed?
--ANSWER--Point of entry is the position on the patient's face where the beam
is aimed.
What angulation must be perpendicular to the film and long axis of the teeth
using the paralleling technique? --ANSWER--Vertical angulation, the up and
down motion, must be perpendicular to the film and axis of the teeth if using the
paralleling technique.
Failing to have the x-ray beam in a perpendicular position in a paralleling
technique will result in: --ANSWER--Foreshortening or elongation will occur if
the beam is not perpendicular in the paralleling technique.
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,What will cause overlapping of proximal contacts? --ANSWER--Improper
horizontal angulation (side to side) will cause overlapping of proximal contacts
in teeth.
In bisecting the angle, which of the following is NOT true? --ANSWER--The
angle between the film and the teeth is bisected no matter how many degrees of
angulation the film is placed from the tooth.
What occurs when the x-ray beam is not centered with the x-ray film? --
ANSWER--Cone cutting occurs when the x-ray beam is not centered with the x-
ray film, because it prevents the beam from coming into contact with the film.
FMX series consist of: --ANSWER--For the average adult, a full mouth series
consists of 18 - 20 images - generally 14 periapical views and 4 - 6 bitewing
views.
Premolar BWX should include: --ANSWER--The distal half of the cuspid
crown
Molar BWX film should be placed: --ANSWER--Centered over the 2nd molars
is the appropriate placement for molar BWX shots.
What improper placement can cause misdiagnosis on BWX x-rays? --
ANSWER--Improper horizontal angulation can cause overlapping of the
proximal surfaces and lead to misdiagnosis.
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, What type of device does digital radiography use to record images taken of the
patient's teeth? --ANSWER--Electronic sensors are used in lieu of standard x-
ray films when recording images of a patient's teeth. While standard films can
have their image scanned into an electronic program, they are not by definition,
digital x-rays
Which of the following inflicts the most radiation on a patient? --ANSWER--
FMX series inflict more radiation on a patient because they require multiple
exposures for all 20 films. There is less radiation needed with a panoramic x-
ray.
What step helps prevent a large radiolucent area near the palate as seen on
panoramic x-rays? --ANSWER--Having the patient place their tongue in the
roof of their mouth during a panoramic x-ray prevents a large radiolucent area
in the palate on the processed x-ray.
Why does digital radiography require less radiation than traditional x-rays? --
ANSWER--Sensors are more sensitive with digital radiography than traditional
x-ray films, allowing the exposure time to be less, reducing radiation.
Digital x-ray sensors: --ANSWER--Intraoral sensors are waterproofed by the
manufacturer, but because they cannot be sterilized, they must have a
disposable barrier placed on them prior to use with each patient.
Page 4 of 106
DENTAL RADIOGRAPHY STUDY GUIDE EXAM
QUESTIONS WITH CORRECT ANSWERS NEW
MODIFIED TESTED AND APPROVED!!!
What makes it possible to produce duplicate sets of radiographs without
additional radiation or the need to use a duplicating machine? --ANSWER--
Using double film packets allows 2 films to be exposed at one time, so there is a
duplicate of the film without need of additional x-ray exposure or duplication.
What size film is usually used for occlusal radiographs? --ANSWER--Size 4
film is appropriate for occlusal radiographs but is too large for other intraoral
radiographs.
What use is a size 2 film most appropriate for? --ANSWER--Posterior PAs and
Adult BWX are appropriate uses for size 2 film.
What technique places film in line with the long axis of the teeth to be
radiographed? --ANSWER--Paralleling places the film parallel with the long
axis of the teeth.
When using the paralleling technique, in what direction is the x-ray beam
aimed? --ANSWER--The x-ray beam is aimed at 90 degrees when using the
Page 1 of 106
,parallel technique. This is because the film is parallel with the long axis of the
tooth, allowing the beam to travel straight ahead.
Which of the following requires the use of a film-holding instrument? --
ANSWER--Paralleling techniques require the use of a film-holding instrument
in order to maintain the position of the film with the long axis of the tooth.
When placing a film in a PID, which of the following is correct? --ANSWER--
The raised dot should face the PID and toward the occlusal surface. This
identifies the proper position of the film as well as prevents the raised dot from
being over any structures that may need to be seen on the x-ray.
What is the position on the patient's face where the central x-ray beam is aimed?
--ANSWER--Point of entry is the position on the patient's face where the beam
is aimed.
What angulation must be perpendicular to the film and long axis of the teeth
using the paralleling technique? --ANSWER--Vertical angulation, the up and
down motion, must be perpendicular to the film and axis of the teeth if using the
paralleling technique.
Failing to have the x-ray beam in a perpendicular position in a paralleling
technique will result in: --ANSWER--Foreshortening or elongation will occur if
the beam is not perpendicular in the paralleling technique.
Page 2 of 106
,What will cause overlapping of proximal contacts? --ANSWER--Improper
horizontal angulation (side to side) will cause overlapping of proximal contacts
in teeth.
In bisecting the angle, which of the following is NOT true? --ANSWER--The
angle between the film and the teeth is bisected no matter how many degrees of
angulation the film is placed from the tooth.
What occurs when the x-ray beam is not centered with the x-ray film? --
ANSWER--Cone cutting occurs when the x-ray beam is not centered with the x-
ray film, because it prevents the beam from coming into contact with the film.
FMX series consist of: --ANSWER--For the average adult, a full mouth series
consists of 18 - 20 images - generally 14 periapical views and 4 - 6 bitewing
views.
Premolar BWX should include: --ANSWER--The distal half of the cuspid
crown
Molar BWX film should be placed: --ANSWER--Centered over the 2nd molars
is the appropriate placement for molar BWX shots.
What improper placement can cause misdiagnosis on BWX x-rays? --
ANSWER--Improper horizontal angulation can cause overlapping of the
proximal surfaces and lead to misdiagnosis.
Page 3 of 106
, What type of device does digital radiography use to record images taken of the
patient's teeth? --ANSWER--Electronic sensors are used in lieu of standard x-
ray films when recording images of a patient's teeth. While standard films can
have their image scanned into an electronic program, they are not by definition,
digital x-rays
Which of the following inflicts the most radiation on a patient? --ANSWER--
FMX series inflict more radiation on a patient because they require multiple
exposures for all 20 films. There is less radiation needed with a panoramic x-
ray.
What step helps prevent a large radiolucent area near the palate as seen on
panoramic x-rays? --ANSWER--Having the patient place their tongue in the
roof of their mouth during a panoramic x-ray prevents a large radiolucent area
in the palate on the processed x-ray.
Why does digital radiography require less radiation than traditional x-rays? --
ANSWER--Sensors are more sensitive with digital radiography than traditional
x-ray films, allowing the exposure time to be less, reducing radiation.
Digital x-ray sensors: --ANSWER--Intraoral sensors are waterproofed by the
manufacturer, but because they cannot be sterilized, they must have a
disposable barrier placed on them prior to use with each patient.
Page 4 of 106
