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Terms in this set (449)
which of the following structures would appear radiopaque on a dental radiograph?
0.5 REM per year
The maximum permissible dose MPD of ionizing radiation for the public is?
When exposing radiographs on an edentulous patient compared to a edentulous patient, the exposure time should?
Take complete medical histories
To reduce cross contamination during dental radiography operators do all EXCEPT?
A plan for corrective action
which of the following should be included in a quality assurance policy for dental radiographs?
which of the following are common parts for the dental X-ray machine?
loses an electron
ionization occurs when an X-ray strikes an atom and the atom ?
which of the following radiographs exposures produces a radiograph that shows the crowns of both the maxillary and mandibular teeth?
which of the following anatomical landmarks is NOT seen on intramural radiographs?
the paralleling technique is recommended for which of the following radiograph exposures?
utilize a film holder
which of the following is recommended to help stabilize intramural film when placed in a patients mouth?
utilize highly concentrated processing solutions
automatic processors do all of the following EXCEPT?
processed films should always be handled by the edges to prevent?
proper care of phosphor plates include?
when labeling radiographs, all of the following should be included EXCEPT?
Which of the following is a result of primary, secondary, and scatter radiation?
which of the following should you ask a patient to do before you begin exposing radiographs?
contrast in a radiograph is primarily controlled by?
away from the tooth, towards the middle of the oral cavity
Paralleling technique requires the film to be placed?
which film would be exposed to see increased coverage of the alveolar bone?
improper handling of film
emulsion damage to a film is caused by?
pointed and sharp
On a radiograph, the anterior alveolar crest normally appears
which of the following film sizes is used for an occlusal exposure?
reduces radiation to patient
What is the primary advantage in using digital radiography?
Which of the following affects the speed of the electrons emitted from the tubehead
Developer solution too low
A processed film has a straight, clear border on the upper edge. This error is caused by
if there are no teeth to serve as guidelines which of the following landmarks indicates a maxillary molar area radiograph?
which of the following errors occur when the vertical angulation of incorrect?
For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must be a minimum of
decrease the amount of radiation
the purpose of intensifying screens is to?
Consumer-Patient Radiation Health and Safety Act
which of the following was established to address the education and certification of operators of radiographic equipment
on a radiograph, when the contact area of one tooth is superimposed over the contact area of another its called?
reduce scatter radiation reaching the film
The purpose of a grid device on an extraoral cassette is to
the main purpose for using a lead apron with a thyroid collar when exposing dental radiographs is to protect the patient from?
dental xray machine
which of the following must be monitored for radiation leakage?
while exposing X-ray films radiation deflecting off the patients head is called?
Age - 18 x 5 rems / year
which of the following is used to determine the occupational maximum accumulated dose MAD of radiation?
which of the following cells exposed to radiation may be associated with leukemia?
from the primary beam
Leakage radiation is defined as any radiation that is
a. rub a finger along the tissues where the film touches
to help desensitize the tissue prior to film placement the DA should?
use a distraction technique
to assist the patient in controlling the gag reflex the DA should?
when documenting a lesion found on a radiograph all of the following should be describe EXCEPT
impacted third molars are best seen with what type of radiograph?
Compared to a round position-indicating device (PID), which of the following PIDs reduces patient radiation exposure by up to 70 percent?
which of the following is the measurement of force that refers to the potential difference between two electrical charges?
Evaluate the x-ray equipment and techniques
If a dental assistant dosimeter badge report indicates exposure to radiation, what should be done first?
which of the following landmarks us useful when mounting films of the mandibular posterior area?
A step wedge can be used to demonstrate
maximum wattage for a safelight bulb should be?
federal state and local laws
Chemical agents should be properly disposed of according to
Improper horizontal angulation
Which of the following causes the interproximal areas of the teeth to appear overlapped?
what size film is most effective when placed vertically in the anterior region to evaluate caries and periodontal health
using a circular PID
Using the ALARA concept as a guideline for radiographs includes all of the following EXCEPT
Lateral Jaw Projection
which of the following extra oral radiographs is used the evaluate impacted teeth, large lesions and fractures of the mandible?
use touch to explain the equipment and procedure
Prior to exposing dental radiographs on a visually impaired patient, the dental assistant should
inverse square law
when changing the 8in PID to 16 in PID which of the following is used to determine the intensity of the beam?
Place a barrier on the sensor
when preparing to take a digital radiograph after selecting sensor size the next step is?
how frequently should processing solutions be changed?
which of the following affects the quantity of X-rays being emitted from the tube head?
optimal temperature for manual processing is?
around 3rd molars
where is the most common area in the oral cavity for dentigerous cyst?
Which of the following radiation effects increase in severity as more radiation is absorbed by somatic cells?
the patients records are?
lingual to buccal
The Buccal Object Rule is used to determine if a foreign body is located in which direction
Patients receive less radiation when using a/an
Long-term effects of exposure to radiation may be associated with
Root shape is abnormally bent or curved
Dilaceration in a radiographic image indicates the
which of the following best describes what happens when two films contact each other during processing?
brownish yellow stains
insufficient rinsing of processed radiographic film will result in?
the date solutions were changed
To maintain quality assurance while processing films, dental assistant should record?
Dental healthcare personnel who are pregnant can expose radiographs during the
closed ended plastic cone
which of the following PID produces the greatest amount of secondary radiation?
When using a 16-inch PID compared to an 8-inch PID the exposure time must
remove the unexposed silver halide crystals
In dental radiography, the purpose of the fixer solution is to
Light-colored radiographs commonly result from
supernumerary teeth are best detected using what type of film
radiation injury results from?
which of the following measures the amount of radiation that reaches the surface of the skin?
anterior nasal spine
which of the following landmarks is useful when mounting films in the maxillary central area?
The penetrating x-ray beam produced during dental radiography is called
On a radiograph, what is the dense radiopaque band that outlines the edge of the mandible?
which of the following film sizes would be used for an adult periodical film?
Cone beam computed tomography uses
Which of the following landmarks are located by the midline of the mandible?
Developing solution temperatures should be checked frequently when using
the best radiograph to evaluate a suspected salivary stone in the submandibular gland is?
A radiograph will automatically be retaken when there is a
which of the following describes a double ended film holder used on posterior and anterior teeth?
Time between exposure to ionizing radiation and appearance of symptoms
which of the following bitewing film sizes is the longest?
fixer solution level was low
Which of the following could cause a straight black line/border to appear on a radiograph?
cells most susceptible to radiation damage are?
The most radiolucent area on an anterior radiograph
which of the following regulates manufacturing and installation of X-ray equipment
properly prescribe radiographs
The most important step the dentist can take in protecting patients from x-radiation is to
A disposable bite block that can be used with the paralleling technique or the bisecting technique.
to view an access on tooth 25 the best radiographic exposure is?
a. not placing the tongue against the palate.
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the patient
a drywall barrier
Dental healthcare personnel can BEST shield themselves from radiation during patient exposure by standing behind
six anterior and 8 posterior
a full mouth series of periapical radiographs taken on an edentulous patient will consist of?
its original lead wrapped packaging
film should be stored in?
a. implementing ALARA principle
The most important responsibility of the dental assistant in dental radiography is
Nitrile Utility Gloves
What kind of gloves are required for the decontamination of the darkroom?
A film with damaged emulsion will appear
Metallic partial denture
Which of the following would cause a radiopaque artifact on a radiograph?
on a full mouth series with 18 films how many anterior films are exposed?
a. : ask a parent or guardian to hold the film
When taking radiographs on a small child who cannot hold the film intra-orally, the dental assistant should
Take the time to explain the procedure
To reduce the patient's anxiety about radiographic exposure the dental assistant should
touch as few surfaces as possible
The best way a dental assistant can minimize cross-contamination when exposing radiographs is to
Laser beam technology
Phosphor plates are processed by using
solutions are changed
Processing tanks should be cleaned when the
The radiation exposure that poses the greatest hazard to the operator is
somatic effects of radiation do NOT have damaging effects on?
Radiographs appear dark after processing when the developing solution is
Which of the following can be used to measure excessive occupational exposure
The most common radiographic exposure used to detect periodontal disease is a/an?
X-radiation created when the primary beam interacts with matter
Which of the following radiolucent landmarks is useful when mounting films in the mandibular anterior area?
which of the following helps decrease exposure of the thyroid gland from the primary radiation beam?
use cotton roll
what can be done stabilize the bite block on a partially edentulous patient?
using expired film
Which of the following may cause film fogging?
on the film packaging box
The expiration date on dental x-ray film is printed
standing behind a lead barrier
Dental assistants exposing x-rays can best be protected from scatter radiation by
The normalizing device can be used to monitor
maxillary anterior periapical
The median palatal suture is visible on which of the following radiographs?
during the processing of x ray film the removal of the halide portion of the exposed crystals is called
radiolucency that may be mistaken for caries
which of the following tissues is the most highly radiosensitive
which of the following is the first step in processing radiographic film
the most common radiographic exposure used to evaluate a dental implant on an adult
decrease exposure time
Which of the following increases the density on duplicated film?
record the occupational exposure received by the operator
personal radiation monitoring devices are worn to
when taking an occlusal radiograph the film packet should extend from the patients mouth by approx?
all facing the same direction
The American Dental Association recommends that radiographs be mounted with the embossed dots
insufficient vertical angulation
Elongation of an image on a radiograph may be caused by:
when exposing X-rays on an edentulous patient which of the following should be used to stabilize the lower arch
the PID shape that most effectively reduces patient exposure to radiation
Human tissue are mainly composed of
focal spot size
Which of the following influences the sharpness of a radiograph?
The amount of radiation and exposure time needed to produce a diagnostic radiograph is best determined by
Back-scatter radiation to the film is prevented by the
Film holding devices
During radiographic exposures, semi-critical items that must be sterilized or disposed of include
The primary purpose of the bitewing radiograph is to evaluate
Lead glass housing
prevents x-rays from escaping in all directions from the tube head
Latent period, period of injury, recovery period
Which of the following is the correct sequence of events following radiation exposure?
diameter of the cone shaped beam produced from a circular collimator
adjust to produce wavelengths with the greatest penetrating power
mimics caries on an intraoral radiograph
increased vertical angulation
Foreshortening of the maxillary radiographic image results from
using barrier envelopes
best way to prevent cross contamination from an exposed film packet is
when exposing posterior periodical radiograph on an adult patient which film should be used
with the midsagittal plane perpendicular to the floor
when taking a panoramic radiograph the patients head should be
Which of the following lesions appears radiopaque on a radiograph?
which of the following is most essential when labeling a film mount
according to the inverse square law when changing the pid length from 8 to 16 the beam intensity is
external auditory meatus
frankfort plane is an imaginary plane passing through
population most susceptible to radiation damage is
white unprinted side of packet
Bitetabs placed on film for use during bitewing radiographs should be positioned on the
all of the following can be used for handling film in the daylight loader except
black paper sheet
Inside the film packet, the film is wrapped with a/an
one sided emulsion
Duplicating film is coated with
If a patient did not remove earrings prior to exposing a panoramic, the radiograph could have
the use of a thyroid collar is recommended for all of the following EXCEPT
Exposing the same film twice
Which of the following results in a double image radiograph?
When radiographs are mounted with the embossed dot appearing outward, this is known as
Wearing a dosimeter
Personnel monitoring for radiation exposure is done by
frankfort plane is angled upward
A panoramic image appears to have a "reverse smile" when the
Storing unexposed radiographic film in high humidity conditions may cause
recycle lead foil in separate container
Once the film has been removed from the protective packet, the dental assistant should?
the benefits outweigh the risks
dental X-rays should be prescribed when
Higher cost of equipment
Which of the following is a DISADVANTAGE of panoramic radiographs?
The endentulous radiographic series may include all of the following except?
Which of the following landmarks would be seen in a maxillary anterior periapical radiograph?
which of the following protection tech is used to minimize radiation to operator
incorrect film placement
the occlusal plane will appear diagonal in the radiograph when there is a/an
how often should step wedge quality control tests for a dental X-ray machine be conducted
maxillary sinus outline is visible
When mounting periapical radiographs, what information helps to distinguish maxillary molar radiographs from mandibular molar radiographs?
inter proximal carries
most common reason for taking bitewing radiographs
fixer solution contacts film
which of the following will cause white spots to appear on radiographs
Compared to the paralleling technique a DISADVANTAGE of the bisecting angle technique is
long term effect of radiation
which of the following radiographic errors is caused by removing a film too quickly from a tightly packed box
the shorter wavelength of electromagnetic radiation the greater the
most commonly used radiographic exposure for a 3 yr old
compared to a edentulous patient radiographic exposure time on a edentulous patient should
which of the following radiation injury theories describes cells that are damaged by way of absorption
converts exposed silver halide crystals
Which of the following best describes the action of the developer solution
Which of the following can help to protect patients from excess radiation damage to tissues?
Which of the following is most likely to cause a stored radiograph to turn brown over time?
radiation absorbed dose
which of the following is a measurement of tissue damage from xray
radiograph technique errors
Which of the following may cause unnecessary radiation exposure to the patient?
floor of maxillary sinus
Which of the following landmarks is useful when mounting films in the maxillary posterior area?
which of the following describes how most radiographic carious lesions appear
which of the following will best protect the dental assistant from cross contamination while exposing xrays
patient movement during exposure
Blurred radiographic images are often caused by
normal anatomic landmarks
Most bilateral findings in radiographs are considered
stop using machine
When the tubehead drifts, the first step the dental assistant should take is to?
restrict the size of the beam
The primary function of collimation is to
The most common artificial radiation exposure comes from
when using the automatic processor how many seconds should be allowed between the insertion of each dental film
filter out the long wavelength from primary beam
the purpose of the aluminum disc in the X-ray tube head is to
added filtration is the X-ray tube head protects
Which of the following quality control tests evaluates safelighting in the darkroom
The amount of which of the following is used in determining the degree of radiation injury?
When exposing radiographs, what is the minimum distance the operator should stand from the tube head?
Which of the following is the most effective method of reducing patient exposure to x-radiation?
obtain consent from parent of gaurdian
before exposing radiographs on a minor the DA should
the best way to correct a cone cutting error is to adjust
ALARA is primarily concerned with the radiation that is
a. an EPA-approved disinfectant
To prevent cross-contamination, wipe the counter top with
right and left sides
Which of the following should be labeled on the radiographic mount prior to film duplication?
Which of the following radiograph techniques is recommended for a patient with a shallow palate?
appear dark on radiograph
Compared to radiopaque structures, radiolucent structures
5.0 rem per yr
MPD of ionizing radiation for occupational exposure is
fluoresce all materials
unique properties of X-rays include their ability to do all of the following except
an xray beam contains photons of various energies that relate to which aspect of beam
X-rays of various lengths
bremsstrahlung is produced when electrons collide with the nuclei of the target atoms creating
ability of X-rays to remove electrons from a substance
the extension from the tube head of the X-ray unit that directs the useful beam is referred to as
the shortest waves of the electromagnetic spectrum are measured in
atoms of cellular structure that have lost electrons is referred to as
PID that is least effective in minimizing scatter radiation is the
they remove X-rays that add to patient absorbed dose
which of the following is true of filters found in X-rays tube head
the tungsten filament in the dental X-ray tube is called
from what portion of the negative pole of the X-ray tube are electrons emitted
limit the size of the X-ray beam
the function of the collimator in the head of the X-ray unit is to
all of the following are forms of energy except
quality or penetrating ability of the electrons is controlled by the setting of the
the beam of X-rays that leaves the target is composed of which type of X-rays
how many electrical circuits are used in dental X-ray machine
which one of the following is responsible for all collimation
according to the federal regulations the beam size should not exceed what number of in from the patients skin surface
patients should wear a thyroid collar during which type of radiographic exposure
insufficient vertical angulation
which of the following would cause elongation on a radiograph
an underexposed film appear
standing behind a wall
During patient exposure, protection from radiation for the dental assistant includes
who's responsible for designating a chemical hazardous
radiation injury can be measured by
which of the following describes how most radiographic carious lesions appear
insurance carries can request
lateral jaw development
A cephalometric radiograph is PRIMARILY used to evaluate
Which of the following should be used to prevent cross-contamination from exposure buttons?
add an electron
To produce ionizing radiation, an atom must
weak developing solution
Which of the following conditions will result in a radiographic image that is too light?
which government agency regulates the effectiveness of sterilizers
the speed of a wave
structures should be magnified to enhance interpretation
THIS IS FALSE
which of the following is not a type of digital image receptor
rampant carries refers to decay that occurs under a restoration or around margins
THIS IS FALSE
waste materials that present a threat to community health or the environment are called
Which of the following occurs only at 70 kVp or higher and accounts for a very small part of the x-rays produced in the dental x-ray machine?
tungsten filament of the cathode
delineates where the thermionic emission effect takes place
person accredited with the initial discovery of xrays
activate the filament circuit
you turn on the X-ray machine for your first patient in doing so you
K shell electrons
electrons with eat greatest binding energy
example of electromagnetic radio EXCEPT
X-rays travel at the speed of sound
1% of the energy produced is xradiation
dental xray is said to be inefficient because
which of the following has the ability to affect living organisms
radiation produced at the atomic level in dental radiography is predominately a result of
reduce patient radiation dose
filters are used in the X-ray beam to
half value layer
best way to describe the penetration of an X-ray beam is by
regulates the quantity of the radiation
the milliampere control dial on the dental X-ray machine
If the useful beam is not centered on the film in the pt 's mouth, the result will be..
2.5 mm of aluminum
the dental X-ray machine in your office operates at 90 kvp and is required to have a total filtration of?
a pulsating divergent beam
xray beam from a conventional dental machine is
for xray timers calibrated in impulses how many impulses are there in a second?
high voltage circuit in the dental X-ray machine requires voltage in the range of 65000 to 100,000 which is achieved by the use of
This material is most resistant to xradiation
to avoid magnification of the image
A 'long cone' (16 inch FFD) is used in the paralleling technique to...
intensity of the X-ray beam decreases
as the distance between the end of the pid and the film increases the ?
using a small focal spot size
image sharpness on a radiograph increases by
the most likely cause for a film with very poor definition is
A radiograph that has many light and dark areas with few shades of gray is said to have:
to increase contrast the operator should decrease?
use of a kilovolt peak between 45 and 65 produces?
the difference in degrees of blackness on a radiograph is called?
on a viewbox
radiographs should always be viewed
if the PID is 2 in away from the patients skin instead of almost touching the resulting radiograph will be?
proper definition, proper detail, sharpness
the criteria for an acceptable radiograph include?
best way to clean intensifying screen in extra oral cassettes is with
imbalance or exhaustion of processing solutions, a light leak, improper safelighting
film fog occurs when all or part of a radiograph is darkened by?
if less film density in needed on the duplicate radiograph the exposure time is shortened
this is false about film duplication
are used in SOME panoramic units
flexible cassettes are?
flexible, light tight, easy to open in the darkroom
intraoral packets must be?
sensitivity x radiation
what the term "film speed" refer?
film requires less radiation exposure
the advantage of a film that emulsion on both sides is?
standard adult film?
is nonscreen film is routinely used in extra oral radiography?
there will be a loss of image sharpness
if the intensifying screen aren't in perfect contact with the will what will happen?
it reduces radiation to the patient
major advantage of using the fastest speed film and high kvp
the primary beam
the greatest dose of radiation to the structures in the patients jaw comes from?
an electron is displaced from its orbit
ionization has occurred when?
which form of radiation can cause ionization of atoms
obtaining diagnostically acceptable radiographs with minimal exposure to radiation
ALARA refers to
they all travel at the same speed
x rays, gamma rays, and microwaves travel how fast?
those with long wavelengths
X-rays that are most likely to be absorbed by skin?
type of scatter radiation occurs most often with dental xrays
an angstrom unit is used to measure?
unit that describes the amount of X-ray exposure in the AIR?
this body tissue determines the sensitivity to radiation?
less patient exposure
using an f film speed compared to an E speed produces a radiograph that helps in?
machine that is at 75 kvp is to have a total aluminum filtration of?
an unnecessary doubling of patient exposure
every radiographic represents?
This PID is the least effective in minimizing radiation scatter
background radiation exposure
radiation history should include all of the following EXCEPT
ON ALL PATIENTS
lead aprons should be used on?
not utilizing selection criteria to prescribe radiographs
not important to minimize patient exposure to radiation
to aid in diagnosis
dental radiographs should be taken
history of previous radiographs, clinical exam, medical and dental history
before prescribing dental radiographs what is needed?
most important use of X-rays in dentistry is?
careful technique, office is well monitored, office is well equipped
the occupational radiation dose will be kept zero if?
the max dose of ionizing radiation that is not expected to cause injury
the MPD is defined as
what cannot be used to check the reliability is the X-ray machine and protective barriers
film badges should be for so they are not blocked by pens or jewelry
what is true about badges
lead lined walls, dry wall construction, cinder blocks/contrete walls
what is Sufficient and provides adequate shielding
change the developer solution
each successive FMS appears lighter than the one before what should be done?
require solutions at high temps
major difference between automatic and manual processing of radiographs is that automatic requires what?
remove unexposed and underdeveloped silver halide from the film and harden the emulsion
the fixer acts to do what?
decreasing developing time
if the temp of the processing sol is above normal the radiographs of desired density may best be obtained by?
invisible until the film is processed
latent image is
twice the developing time
An exposed radiograph should remain in the fixer in order to attain archival life for...
size of darkroom
the effect of safelight illumination in the darkroom doesn't depend on which of the following
not: exposure to white light
could be a cause: unexposed film, excessive washing, prolonged fixing
a radiograph is clear after processing, what did NOT cause it?
kept in the developer bath
in the time temp method of processing dental radiographs the thermometer is
develop, rinse, fix, wash and dry
steps in manual processing
emission of oxidizing agent
manufacturers recommend that radiographic developing solutions be covered to prevent
the safelight is faulty
the coin test of a safelight in the darkroom shows a clear outline of a coin what does this mean
films will stick together
if the films are fed into he automatic processor too fast what will happen
for quality assurance of processing solutions
a step wedge would be primarily used?
solutions were not stirred
After developing a complete radiographic series, the operator notices that the films on the bottom of the rack are of a different density than those at the top of the rack and concludes that...
confirming endondotic measurement
one indication of "rapid processing" would be
every 2-3 weeks
processing solutions should be changed depending on usage every?
sterilization, disinfection, antiseptic agent
what infection control procedures are used
possibility of cross contamination within the confined area of the loader
daylight loaders aren't recommended for infection control bc?
operators should take care not to touch the films as they are dropped into clean surface
if a barrier envelope is NOT used
infection control procedures should be followed for
gloves aren't necessary after the film has been removed from the pack
with the use of the barrier envelope
don't act sterilization agents
developer and fixer solutions
destroys the image
autoclaving a contaminated and exposed film packet
is obtained through a questionnaire, direct questioning, alerts the dental team to the presence or history of infectious disease
every patient should have a current medical history that
the solution may seep into the electrical connections
using disinfecting solutions on the dental X-ray unit is not recommended bc
microorganisms can remain viable on radiographic equipment for at least
the exposure switch should be covered with plastic
when taking a FMX :
less thyroid dose to the patient, less dimensional distortion, less exit dose
a reason for using the paralleling method instead of bisecting is?
collimator cutoff (cone cut)
in taking radiograph you didn't center the beam on the film what will result
excessive FFD (focus to film distance)
Radiograph shows thin images what could cause it?
have a thin image with a geometric pattern
film packet is placed in patients mouth with wrong side facing X-ray what happens?
superimposition of the metallic object on film
failure to remove dentures while taking radiographs may cause?
avoid magnification of image
A 'long cone' (16 inch FFD) is used in the paralleling technique to...
Using a localizing ring with a film holder helps in preventing...
maxillary molar projection
Projection most likely to excite the gag reflex is the..
good operator technique
The best way to prevent patient movement during intraoral radiography is...
varies in need and number of films according to selection criteria and mouth size
right angel technique
another correct way to refer to paralleling is
the dot in the slot
in order to avoid creating an artifact on apex of tooth when placing film what is done?
first and second premolars, most of the first molar, distal of canine
placement of the premolar projection should include
the posterior topographic view of the maxilla can be considered a top view of
most anterior part of the cheekbone
using the bisecting technique for maxillary premolar projection the point of entry is
mandibular right angle occlusal projection
best way to visualize a salivary stone of in the mouth
middle of the second molar
for the maxillary molar projection the center of the film packet should be aligned with
in bisecting tech if the central ray is not perpendicular to film in the horizontal plane the resulting film will be
maxillary topographic occlusal
what would be the projection to visualize a large lesion in the midline of the palate
roots of molars
when using the bisecting technique the point of entry for mandibular molar projection is the ?
same as periapical film
film speed of occlusal film is
maxillary right angle occlusal
best projection to decide whether an impacted maxillary cuspid is located buccally or lingually is the
small children, people with shallow palates, patients with anatomic constrains prohibiting use of paralleling tech
bisecting can be more helpful when
change developer solution
each pan film is lighter than the one before what should be done
anatomic structure usually NOT seen on an intramural periodical but seen on pantomograph
will create a large radiopaque on film
if led apron is placed too high
To see the borders of a lesion that are larger than periapical film
the main reason for taking a panoramic
caries and periodontal disease
panoramic radiographs CANT be used of r
significant reduction in patient radiation dose
main adv of using intramural source for panoramic radiography is
adv of panoramic include all of following EXCEPT
left lateral oblique
the best projection for viewing an impacted left mandibular third molar is
reduce object scatter
grids are used for
increase beam divergence
extraira radiographs an increase FFD is necessary to
may be rigid or flexible, contain intensifying screen, available in sizes
safelight is too intense
extra oral films appear dense and fogged but intraoral films aren't , why?
time temp method
extra oral films are processed by
major adv of using extra oral projections with screens
A conventional panoramic projection will show both the right & left joints in the
can be used for digital radiography
dental xray unit
thinner and direct senors
storage phosphor sensor is
optically scanned digital radiography
The type of digital imaging system that is similar to scanning a document is
32 gray levels
human eye can discern
optical scanning digital radiography
darkroom and processing capability is needed in
most critical part of digital radiograph system
digital imaging for pan units...
a computer print out
hard copy is
1.5 to 5 min
for digital radiography and generated how fast
placing sensor parallel to tooth
The major difficulty in using direct digital radiography is
can be ingrates to office record system, be be enlarged, can be inverted
digital intraoral sensor
acquire digital image
all of the digital imaging systems differ in how they
articular disc of tmj
main application of MRI in dentistry is for
thyroid collars, film holders, lead apron
part of the quality assurance program includes maintaining the conditionals of protective devices such as
monitoring chemical strength and level of processing solutions
most critical part of dark room quality assurance is
processing solutions should be changed
scientifically controlled way to test the strength of processing sol is by
if clearing the film takes more than 4 minutes the fixer is
darkroom must be a darkroom and nothing else
darkroom QA program to be effective
at the same time
developer is fixer solutions will be changing
a body defense mechanism
gag reflex is
do a reverse bitewing
when a patient moves constantly and bites packet the operator should
hold film in patients mouth
dental professionals should never
dentist, hygienist, dental assistant
proper patient management is the responsibility of
is occasionally found
a shallow palate that will not allow proper placement of film for paralleling
use of undiluted mouth wash
gagging in many cases can be controlled or prevented by
which dental specialty is the marking grid usually employed
localizing by definition
least reliable way to localize impaction of buccolingal plane
unbroken radiolucent line around root
periodontal ligament surround tooth appears
appears radiopaque on radiographs and is seen in crown and roots
THIS IS NOT RADIOOPAQUE
cannot be seen on mandibular molar film
occlusal part of alveolar bone is referred to as
inferior border of mandible
can be seen on mandibular radiograph
interpretation of RGs is for building a
visualizing the articulator disc
dental professions may use a CT scanning for
rapidly growing radiolucent lesion with irregular borders could be a sign of
most lesions in the oral cavity
best way to detect cavities
none- physically seen
radiographic changes evident in gingivitis include
common reason for taking xrays
most likely diagnosis of interpret RO just about cervical line on clean tooth is
overlying normal structure
difficult to visualize buccal caries bc?
soft tissue isn't seen
gingival recession is not detectable bc
spreading laterally and advancing towards pulp
when caries invade the dentin from the enamel its seen as
teeth that have short roots will?
vertical bone loss
infra bony pocket is seen with
designating abutments for a fixed bridge
crown root ratio seen becomes critical in
inter proximal caries
type of caries best detected on RG
DOES NOT resemble caries on Rg
best rg for detection of periodical pathology
rapid excessive end pressure, chronic peri infection, chronic periodontal infection
root absorption is caused by
pulp chamber and canals of teeth in older patients are
normal rg anatomic landmark that can be misdiagnosed as periapical pathology
density of secondary dentin when compared rg to normal dentin
large high pulp horns are more frequently seen in
condensing osteitis, sclerotic bone, hypercementosis
will appear RO on radiograph
rg pulp capping materials will appear
cells of the periodontal ligament reabsorb the cementum and dentin of the root is known as
incomplete root formation
RL at the apices of a permanent mandibular second molar has no caries or restorations is probably
anodontia, tumors, supernumerary teeth
conditions affecting the eruption pattern that can only be seen rg exam include
most impacted teeth are not seen in
NOT a common supernumerary tooth
teeth with hypercementosis usually
best projection for impacted third molar
Sets found in the same folder
DANB - Radiology
RHS DANB Study Guide
Sets with similar terms
Simulated Exam 4
Radiology Midterm 2