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a panoramic radiograph is valuable when diagnosing each of the following except one
recurrent caries
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which of these is an advantage of a panoramic radiograph when compared to an intraoral radiograph
superimposition of structures may make interpretation difficult
-
what is the term given to the technique where a slice of tissue is exposed distinctly, whereas structures outside the designated area are blurred out of the image
tomography
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all panoramic radiographs have 10 to 30 percent magnification
it is desirable to keep the magnification less in the anterior region and greater in the posterior region
the first statement is true. the second statement is false
-
the panoramic PID is collimated to what shape
narrow slit
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what term is given to the area where structures will be imaged with relative clarity, whereas structures outside this area are blurred out of the image
focal trough
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each of the following is a component of the panoramic x-ray machine EXCEPT one
variable exposure timer
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which dimension of the focal trough does the biteblock of the panoramic x-ray machine assist the operator with positioning
anterior-posterior
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which of the following planes is used to position the patient correctly within the superior-inferior dimension
both ala-tragus line and Frankfort plane
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which of the following positioning errors results in anterior teeth that are blurry and narrowed in size
too far forward in the focal trough
-
when the dental arches are rotated to the left, the teeth on the right side will be positioned closer to the image recepetor
the teeth closer to the image receptor will appear blurry and magnified
both statements are false
-
which of the following positioning errors results in an exaggerated smile appearance of the arches
chin tipped too far down
-
the appearance of a large radiolucency that obscures the max teeth apices results when..
the tongue is not resting on the palate during exposure
-
which of the following appears radiolucent on a panoramic radiograph
nasal cavity
-
which of the follwing appears radiopaque on the panoramic
zygomatic process of the maxilla
-
which of the following could be called a negative shadow
glossopharyngeal air space
-
what is the term given to a structure that is recorded a second time with less sharpness and on the opposite side
ghost image
-
to avoid molar overlap the radiographer should place the image receptor
perpendicular to the molar embrasures
-
to minimize canine premolar overlap the radiographer should direct the xray beam toward the image receptor slightly obliquely from the...
distal
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to compensate for a shallow palatal vault the vertical angulation may be adjusted to
increase by up to 15 degrees
-
which area of the oral cavity requires the highest exposure setting
maxillary posterior region
-
the presence of a large mandibular torus may make which of these difficult
placing the image receptor precisely
-
the best image receptor placement for a patient with a torus palatinus is
behind the torus
-
the paralleling technique is the best technique for imaging the edentulous areas
the bisecting technique is the best technique when imaging the endodontic treatment
- first statement is true
- second statement is false
-
which of the following radiographs wold be the least beneficial for the totally edentulous
bitewing
-
the exposure setting for edentulous regions shouls be decreased from the exposure time for the same region with teeth by
one fifth
-
which of the following would be the best image receptor holder for exposing working radiographs during a root canal procedure
commercially made endodontic holder
-
localization adds which of the following dimensions to two-dimensional radiographs
buccal-lingual
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which of the following mehtods of localization utilizes a cross sectional occlusal radiograph
right-angle method
-
if the tube shifts to the mesial and the object in question shifts to the distal the object is located on the lingual
this is an example of the definitive method of localization
both are false
-
when exposing a disto-oblique periapical radiograph of the maxilla, which of the following changes should be made to the standard periapical radiograph
all of the above
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to prject an imacted mandibular third molar anteriorly onot the image receptor, a mandibular disto-oblique paricapical radiograph requires a
10 degree shift in the horizontal angulation
-
a competent dental hygienist and dental assistant must be able to identify which of the following radiographically
normal anatomy
-
which of the following facial bones would most likely appear on a periapical radiograph
zygoma
-
bone sometimes has a mixed radiopaque-radiolucent appearance due to the nature of the
trabeculae patterns
-
whicn of the following will most likey appear as a radiopacity outlining the tooth root
lamina dura
-
when nutrient canals open at the surface of the bone, the often appear radiographically as
small radiolucent dots
-
which of these structures appears radiolucent
pulp
-
a periaplical radiograph of a 10 year old will most likely reveal developin gpermanent dentition
evidence of a congenitally missing permanent tooth is clled impaction
- the first is true
- the second is false
-
on a PA radiograph of the max molars, which of the following structures may be recorded superimposed over the roots of the teeth
zygomatic process
-
each of these features will appear radiolucent except
spine
-
each of these features will appear radiopaque except
sinus
-
which of the following is the best reccomended sequence for identifing normal radiographic anatomy
- 1. determin if max or mand
- 2. determine of anterior or posterior
- 3. determine if structure is paque or lucent
-
each of the following may appear on a PA radiograph of the max anterior region except
maxillary tuberosity
-
each of the following may appear on a PA radiograph of the max post except
hamulus
-
a mand landmark feature that may be imaged on a PA radiograph of the max posterior region is the
submanibular fossa
-
each of the following may appear on a PA radiograph of the mand posterior except
pterygoid plate
-
the inverted Y landmark is composed of the intersection of which two structures
lateral wall of the nasal cavity and anterior border of the max sinus
-
a desirable film mount should be
black, to block out light transmission and prevent glare
-
which of these helps determine whether the radiograph is the patients left or right side
indetification dot
-
labial method film mounting positions the identification dot concave
the labial method is the recommended film mounting method
the first statement is false. the second is true
-
lingual method film mounting positions the identification dot convex
when utilizing the lingual method the viewers right is the patients left
both are false
-
mounting is the placement of the radiographs in a holder arranged in anatomical order
all radiographs should be handled with care to prevent smudging or scrathing
both are true
-
which of the following should be done first when mounting radiographs
orient the identificiation dot the same way
-
each of the following will aid the radiographer in correctly mounting radiographs except one
roots and crowns of mand teeth are usually larger than max teeth
-
reading and explaining radiographs is
interpreting
-
the final responsibilty to diagnose the radiograph rests with the
dentist
-
viewing radiogrpahs in a sustematic sequence can help prevent errors in interpretation
moutned radiographs may be thoroughly viewed by holding the mount up to overhead room lighting
the first statement is true. the second is false
-
which of thes is not a consideration when viewing digital radiographic images
a magnifying glass will be required for optimal viewing and interpretation
-
in which region is it best to begin the interpretation process when viewing radiographs mounted using the labial method
max right posterior
-
following diagnosis by the dentist, the radiographic findings must be recorded on the patients record by the
- any of the above
- hygienist
- assistant
- dentist
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