Deck 12: Panoramic Radiography

Question 1

The main disadvantage of panoramic films is:

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

Answer 1

loss of definition and detail.

Question 2

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 chin was tilted up too far.
C)patient moved during the exposure.
D)patient's lead apron was placed too high.

Answer 2

patient's lead apron was placed too high.

Question 3

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).

Answer 3

computed tomography (CT)scanning.

Question 4

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

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

Question 5

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 6

A high thyroid collar placement should never be used when:

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

Question 7

Static electricity artifacts appear as:

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

Question 8

All of the following are advantages of panoramic radiography EXCEPT one.Which one is the EXCEPTION?

A)Image quality
B)Time of exposure
C)Patient cooperation
D)Simplistic procedure

Question 9

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

Question 10

All of the following are terms to describe the plane of the object that is not blurred on the panoramic radiograph EXCEPT one.Which one is the EXCEPTION?

A)Image layer
B)Focal trough
C)Frankfort plane
D)Plane of acceptable detail

Question 11

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

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

Question 12

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's chin was tilted up too far.
B)patient's chin was tilted down too far.
C)patient was too far forward in the focal trough.
D)patient was too far back from the focal trough.

Question 13

Indications for dental office tomography include all of the following EXCEPT one.Which one is the EXCEPTION?

A)Placement of dental implants
B)Diagnosis of interproximal caries
C)Diagnosis of pathologic lesions
D)Evaluation of the temporomandibular joint

Question 14

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

Question 15

Panoramic films are processed:

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

Question 16

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 sagittal plane.
B)the occlusal plane.
C)the Frankfort plane.
D)the midsagittal plane.

Question 17

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 18

The plane of the object that is not blurred on the radiograph is called the focal trough.

Question 19

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

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

Question 20

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