Chapter 22

If one used a conventional unit to image a mandible, the kV is likely 45 to 50, yet when using the dental unit for mandibular teeth, the settings are generally preset at 70 or 80. More exposure is required:

a. Because dental units are high-frequency units

b. For teeth as compared to the mandible itself

c. Because there are no intensifying screens in dental film

d. Because the SID is increased in dental radiography

C

Your clinic has ordered a dental radiography unit, and the veterinarian wishes you to investigate what extra electricity is required. You report that the dental unit requires:

a. A 110-volt line with no special wiring

b. A 110-volt line with special grounding

c. A 220-volt line with a ground wire

d. A 220-volt line without special wiring

A

Which part of your new dental x-ray machine can swing 180 degrees? a. Scissor arm

b. X-ray tube

c. Extension arm

d. Control panel

C

Direct digital dental radiography in dentistry:

a. Requires an intermediate step for processing

b. Is more expensive to buy compared with the other digital system

c. Generally utilizes a smaller sensor

d. Utilizes thin and flexible plates similar to regular film

C

CR PSP plates are available in the following size, which is not available in film:

a. 0

b. 2

c. 3

d. 4

D

You are getting a patient file for the veterinarian to review about a month after dental films were processed. You notice that the films, which were perfectly diagnostic at the time, now appear foggy and have a coffee-color appearance with poor density and contrast. You realized that you:

a. Fixed the film for 15 seconds and dabbed the film in the water jar

b. Fixed the film for 2 to 4 minutes and washed in running water

c. Developed for 15 seconds and fixed for 2 to 4 minutes

d. Used fresh chemicals for processing these films

A

The dental formula for the permanent teeth in the cat is:

a. (3121/3131) = 30

b. (3131/3121) = 30

c. (3133/3142) = 42

d. (3142/3143) = 42

B

A dog has the following three rooted teeth:

a. 108, 109, 110, 208, 209, 210

b. 308, 309, 310, 408, 409, 410

c. upper and lower fourth premolars and molars

d. 208 and 108 only

A

The area on the periphery of the tooth where the crown and root meet is the:

a. Dentin

b. Enamodental junction

c. Cementoenamel junction

d. Cementum

C

When x-raying a maxillary canine tooth, what is the angle in which the tube head is moved up vertically to prevent superimposition of the canine tooth over the premolars distal to it?

a. 20

b. 30

c. 15

d. 45

B

The bisecting angle technique in a dog is used on all of the following areas except:

a. 303

b. 409

c. 204

d. 105

B

The veterinarian suspects damage of tooth 104 in a Border Collie. You are best to position the patient in:

a. Right lateral recumbency

b. Left lateral recumbency

c. Dorsal recumbency

d. Ventral recumbency

B

The tips of the teeth should be situated on this size 4 film on the: a. Center of the film

b. Convex side of the film

c. Away from the convex dot side of the film

d. Concave side of the film

B

Define SLOB

same linguinal opposite buccal