Deck 12: Panoramic Radiography

Question 1

Your panoramic radiograph reveals narrow anterior teeth, the spinal column superimposed over the ramus, and overlapped premolar contact areas. Identify the cause of this error:

A)patient was too far back from the focal trough
B)patient did not hold the tongue against the palate during exposure
C)patient's chin was tilted down too far
D)patient was too far forward in the focal trough

Answer 1

patient was too far forward in the focal trough

Question 2

All of the following are advantages of panoramic radiography EXCEPT:

A)patient cooperation
B)image quality
C)time of exposure
D)simplistic procedure

Answer 2

image quality

Question 3

Identify the area of the mouth in which most overlapped images are seen during panoramic radiography:

A)incisors
B)canines
C)premolars
D)molars

Answer 3

premolars

Question 4

If the patient is not positioned properly in the focal trough, _____________ will result on the opposite side.

Question 5

The plane of the object that is not blurred on the panoramic radiograph is termed:

A)image layer
B)focal trough
C)plane of acceptable detail
D)all of the above

Question 6

The bilateral radiolucent line that can be seen crossing the ascending ramus of the mandible on a panoramic radiograph is:

A)the hard palate
B)a fracture line
C)the pharyngeal air space
D)the maxillary sinus

Question 7

Patient movement during the taking of a pantomogram is reduced by:

A)a three-point fixation of the patient's head
B)reducing exposure time
C)having the patient rinse with mouthwash
D)taking the film sitting down

Question 8

Identify the error seen if a panoramic radiograph is exposed to the light from a cell phone during processing:

A)film will be darker
B)film will be lighter
C)film will be fogged
D)no change will be seen in the processed radiograph

Question 9

The main disadvantage of panoramic films is:

A)increased patient exposure
B)loss of definition and detail
C)lack of contrast
D)possible patient movement

Question 10

A panoramic unit has a narrowly collimated __________.

Question 11

Indications for dental office tomography include all of the following EXCEPT:

A)placement of dental implants
B)diagnosis of interproximal caries
C)evaluation of the temporomandibular joint
D)diagnosis of pathologic lesions

Question 12

Static electricity artifacts appear as:

A)multiple black linear streaks
B)multiple clear linear streaks
C)fogged areas on the film
D)yellow-brown artifacts on the film

Question 13

A large radiopacity is seen on the middle of the panoramic film. Identify the cause of this appearance:

A)patient was slouched in the unit
B)patient's lead apron was placed too high
C)patient moved during the exposure
D)patient's chin was tilted up too far

Question 14

All of the patient's __________ must be removed before taking a pantomogram.

Question 15

Another application of tomography used in dentistry is:

A)sialography
B)digital radiography
C)computed tomography (CT)scanning
D)transcranial radiography of the temporomandibular joint (TMJ)

Question 16

A high thyroid collar placement should never be used when:

A)taking bitewings on children
B)taking occlusal films
C)taking pantomograms
D)the patient has a history of radiation therapy to the neck
E)all of the above

Question 17

The imaginary line that runs from the inferior border of the eye socket to the superior border of the external auditory meatus is called:

A)the Frankfort plane
B)the midsagittal plane
C)the occlusal plane
D)none of the above

Question 18

The facial exposure from a panoramic radiograph is roughly equivalent to ___________.

Question 19

Common positioning requirements for panoramic radiography state that the midsagittal plane be parallel to the floor. In addition, the Frankfort plane should be perpendicular to the floor.

A)both statements are true
B)both statements are false
C)the first statement is true;the second statement is false
D)the first statement is false;the second statement is true

Question 20

Panoramic films are processed:

A)in the same manner as intraoral films
B)only with automatic processors
C)by sight development
D)with a safelight of less intensity