Deck 13: Extraoral Techniques

Question 1

Extraoral 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

Answer 1

with a safelight of less intensity

Question 2

The best extraoral projection to detect a fracture of the zygomatic arch is the __________.

Answer 2

submentovertex

Question 3

The limitation for using the posterior anterior projection for visualizing the maxillary sinus is:

A)exposure time
B)superimposition of the maxillary tuberosity
C)superimposition of the zygomatic arch
D)patient positioning

Answer 3

superimposition of the zygomatic arch

Question 4

Identify the projection used to view the sphenoid and ethmoid sinuses:

A)posteroanterior
B)lateral skull
C)Waters' view
D)submentovertex

Question 5

The extraoral projection used in cephalometric analysis is the _________ projection.

Question 6

Cassettes with intensifying screens are used in extraoral radiography to ________.

Question 7

Depending on the type of panoramic unit, rigid or ________ cassettes are used.

Question 8

Which of the following methods is best for radiographing an impacted third molar?

A)posterior anterior
B)lateral oblique projection of the mandible
C)lateral skull
D)posterior anterior of the sinuses

Question 9

The Waters' projection is taken in the:

A)coronal plane
B)sagittal plane
C)axial plane
D)none of the above

Question 10

Identify the projection used in tomography as a scout film to determine condylar position:

A)posteroanterior
B)lateral oblique
C)Waters' view
D)submentovertex

Question 11

For patients with bilateral mandibular impactions, the right and left lateral oblique techniques have been replaced by:

A)occlusal films
B)posterior anterior projections
C)panoramic films
D)all of the above

Question 12

Identify the projection used to view the maxillary sinus and middle third of the face:

A)lateral oblique
B)lateral skull
C)Waters' view
D)submentovertex

Question 13

Extraoral projections should use:

A)100 kVp
B)65 kVp
C)45 kVp
D)none of the above

Question 14

Identify the projection used to view the entire skull in the sagittal plane:

A)lateral oblique
B)lateral skull
C)Waters' view
D)submentovertex

Question 15

If there is no cassette available, in an emergency a (an)___________ can be used to make a lateral oblique projection of the mandible.