Chapter 21, 22, 23 review
In placing a periapical radiograph, how may inches over the occlusal/incisal edge should the film packet be placed?
1/8
Occlusal radiographs may be taken to view which of the following?
2,3,5 2.Supernumerary teeth 3.Cysts 5.Impacted teeth
Sensor/image plates for digital imaging can come in which of the following sizes and designs?
2,4,6,7 2.panormaic 4.Cephalometric 6. Full sized "0" x-ray 7.full sized "2" x-ray
Sensor/image plates for digital imaging can come in which of the following sizes and designs?
2. Panoramic 4. Panoramic 6.full sized "0" x-ray 7.full sized "2" x-ray
The computer monitor can display over ____ shades of gray, but the human eye can detect only ___ shades of gray.
200 , 32
The tissue/organs most sensitive to radiation include
3,4 3.Bone marrow 4.Reproductive cell
which of the following are intervals of taking radiographs for routine dental exams?
6 months 12months
When a conventional x-ray machine is used with digital radiography, the x-ray machine should be capable of producing ___ kV
70
The temperature for automatic processing is around ___ degrees.
90
The effects of radiation are
Accumulative
A dosimeter badge should be worn
At all times in the dental office
the safelight is of _____ spectrum.
Blue-green
Movement by the patient's head or the tubehead results in
Blurred image
The ____ is one of the most widely used image receptors in dental digital radiology
CCD
The molybdenum focusing cup is on which side of the x-ray tube?
Cathode
The radiograph used to asses the patient's skeletal profile and structure is
Cephalometric
A film not exposed to radiation results in
Clear film
Milliamperage seconds determine the amount of radiation exposure the patient receives. The difference between the shades of gray is the
Contrast
Streaks on film are a result of
Dirty rollers on an automatic processor Dirty processing racks
The area on the tungsten target where the electrons hit is the
Focal spot
In the developing solution, which chemical blackens the exposed silver halide crystals?
Hydroquinone
The dental film that reduces radiation exposure up to 20 percent is the
Kodak insight F-speed
The time between the exposure and the development of biological effects is the _____ period.
Latent
which dental specialty routinely uses the cephalometric radiograph?
Orthodontics
Incorrect horizontal angulation results in
Overlapping
In the paralleling technique, the film packet must be
Parallel to the long axis of the tooth
which dental specialist would be the most likely to ask for vertical bitewing
Periodontics
In the bisecting angle exposure technique, the central beam must be
Perpendicular to the bisecting line
Extraoral cassettes are usually lined with
Phosphors intensifying screens
which of the following will the bitewing radiograph cover
Premolars area molar area
The experiment with a cathode ray tube called the Hittorf-Crookes tube was used to discover which of the following?
X-ray
X-ray film is sensitive to
all of above
Bitewing will detect which of the following?
all of the above
Duplication of a radiograph requires
all of the above
The lead apron with the thyroid collar should be used for
all of the above
which observations should be made of a child's mouth before placing films.
all of the above
Another name for the lead diaphragm is the
collimator
If the beam missed part of the film, the result is
cone cutting
In regard of the size of crystals in the emulsion, the larger the crystal the
faster the film
The dental film that has the highest speed for the greatest reduction in radiation exposure for the patient is the
insight
What determines the quality of radiation?
kilovoltage
When mounting films the term used when placing the dot towards the operator is called
labial mounting
kidney, muscle, nerves
least sensitive
mature bone, salivary glands, thyroid, liver
less sensitive
skin, intestinal tract, oral mucosa
moderately sensitive
lymphoid, reproductive cells, bone marrow, intestinal epithelium
most sensitive
child film
no.0
narrow anterior film
no.1
adult film
no.2
long bitewing film
no.3
occlusal film
no.4
The dental specialists who routinely use extraoral radiographs are
oral surgeons and orthodontists
connective tissue, growing bone
sensitive
the size of narrow anterior film is
1
Panoramic radiographs give the dentist a view of
1 2 3 4 5
Light film image is a result of
Underexposure underdeveloping
In which position should the patient be placed for a bitewing radiograph?
Upright
The inventor of x-ray is
Roentgen
The radiation that is deflected from its path as it strikes matter is ____ radiation.
Scatter
Which statement equals more energy?
Short wavelength with high frequency
