Chapter 21

Question 1

Immediately after an impression is taken, it must be rinsed under running water to remove saliva or blood. This step is essential before then pressure can be disinfected.

Answer 1

Both statements are true.

Question 2

Chair side adjustments of appliances may be performed with a unit dose of abrasive, a sterile handpiece and bur, and a sterile rag wheel for polishing. This eliminates the need for disinfecting the appliance before handling.

Answer 2

Both statements are true.

Question 3

All but one of the following steps must be performed when disinfecting a removable dental appliance before making laboratory adjustments. Which one is the exception?

Answer 3

Clean ultrasonically by placing the appliance directly into the solution in the ultrasonic unit holding tank.

Question 4

In the laboratory, when polishing dentures that have been worn by a patient, it is necessary to use a sterile rag wheel. This is because the dentures will be disinfected before and after an adjustment is made.

Answer 4

Neither the statement nor the reason is correct.

Question 5

After chair side adjustments are made to a dental prostheses, it is cleaned, disinfected, rinsed, and stored. The recommended storage method is

Answer 5

A zippered plastic bag containing mouthwash and water.

Question 6

The primary goal of infection control when handling and disinfecting impressions, dentures, and appliances is to

Answer 6

Prevent cross-contamination

Question 7

Disinfection by immersion is preferred over disinfection by spraying. The most important reason is because

Answer 7

Constant contact of the spray with all surfaces of the impression can not be assured.