Radiographic Technique

Question 1

The distance of the x-ray machine head from the patient should be what?

Answer 1

Kept as short as possible

Question 2

What are the results when kVp is low?

Answer 2

Low density

High contrast

Question 3

What are the results when kVp is high?

Answer 3

High density with very little contrast

Question 4

Where should the radiographic film be placed?

Answer 4

So that the plastic side is facing toward the subject and head of the radiographic unit

Question 5

When is the parallel technique for oral radiographs indicated?

Answer 5

To evaluate the caudal mandibular teeth and the nasal cavity

Question 6

Where is the x-ray film packet or sensor inserted to capture the posterior mandible (mandibular premolar and molar teeth)

Answer 6

Between the tongue and mandible

Question 7

Where can the parallel technique not be used?

Answer 7

The rostral and caudal maxilla (the hard & soft palates are in the way)
The rostral mandible (the mandible prevents putting the film parallel to the teeth)

Question 8

What can be used instead in areas where the parallel technique cannot be used?

Answer 8

The bisecting angle technique

Question 9

How is the bisecting angle obtained?

Answer 9

By visualizing an imaginary line that bisects the angle formed by the x-ray film and the structure being radiographed

Question 10

What happens to the image if the x-ray beam is aimed at the tooth?

Answer 10

The image will be distorted by elongation

Question 11

What happens to the image if the x-ray beam is aimed at the film?

Answer 11

The image will be foreshortened

Question 12

How do you take an x-ray using the bisecting-angle technique?

Answer 12

The x-ray head is positioned so that the beam of the x-ray will be perpendicular to the imaginary bisecting-angle line

Question 13

Where is the film placed to capture the maxillary caudal teeth?

Answer 13

Across the maxilla parallel to the hard palate
Equal margins on both sides of the maxilla
The long end of the film is parallel with the muzzle

Question 14

Where is the machine head placed to capture the maxillary caudal teeth?

Answer 14

45 degrees off the vertical and horizontal planes of the muzzle

Question 15

Where is the film placed to capture the maxillary rostral teeth?

Answer 15

Parallel to the hard palate

Question 16

Where is the machine head placed to capture the maxillary rostral teeth?

Answer 16

45 degrees off the vertical and horizontal planes of the patient’s muzzle

Question 17

Where is the film placed to capture the mandibular anterior teeth?

Answer 17

Parallel to the mandible

Question 18

Where is the machine head placed to capture the mandibular anterior teeth?

Answer 18

70 degrees off the horizontal plane of the anterior mandible with the patient in dorsal recumbency

Question 19

What are the least views used to obtain a complete radiographic study?

Answer 19

6 views
Right and left posterior maxilla
Right and left posterior mandible
Anterior maxilla
Anterior mandible

Question 20

How are the canine teeth best evaluated?

Answer 20

By placing the machine head 45 degrees from the front of the patient and 45 degrees from the side of the patient

Question 21

Where should the dimple of the film be?

Answer 21

“In the air” on the right side

“In the bone” on the left

Question 22

How many roots does the maxillary 4th premolar have?

Answer 22

3

Question 23

What rule describes what to do when the mesiobuccal and palatal roots are lining up together?

Answer 23

The SLOB rule

Same lingual, opposite buccal

Question 24

The thickness of the sensor makes it difficult to get it back far enough in the mouth to reach the maxillary second molar. What is the solution to this?

Answer 24

Move the sensor as far back as possible, then move the machine head further caudal and aim it more rostral

Question 25

Due to the thickness of the sensor and the musculature and angle of the jaw, it is difficult to reach the mandibular third molar. What is the solution to this?

Answer 25

Move the machine head further caudal and aim it more rostral

Question 26

Due to the location of the maxillary canine, what is the best bisecting angle to capture this tooth?

Answer 26

Angled midway between the front and side of the muzzle and midway from the plane of the tooth and plane of the sensor

Question 27

What are the two techniques to help visualize the roots of the third and fourth premolar of cats?

Answer 27

The extraoral technique

The almost parallel technique

Question 28

Where is the sensor, the patient and the head of the machine placed for the extraoral technique?

Answer 28

The sensor is placed directly on the tabletop
The patient’s head is placed on the sensor
The x-ray beam is directed so that it skylines the palate

Question 29

Where are the film and head of the machine placed for the almost parallel technique?

Answer 29

The film is on the opposite side of the mouth being studied

The beam is directed to that it skylines the palate