Question 1

All of the following materials are considered regulated infectious waste EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

Saliva-coated gloves are not considered regulated waste.

Question 2

Which of the following methods or materials is the most effective for preventing transmission of hepatitis B in the oral health care setting?

Accepted Answer

Vaccine- derived immunity is the only absolute protection against acquiring HBV in the dental setting.

Question 3

Dental handpieces are considered critical items and must be sterilized using:

Accepted Answer

Dental handpieces must be heat sterilized.

Question 4

A chemical indicator is used on the outside of packaging to identify the items that have been processed through the sterilizer. The chemical indicator changes color when the packages are sterile.

Accepted Answer

Chemical indicators are used to identify items that have been processed through the sterilizers; however, chemical indicators cannot determine sterility. Only biologic indicators can ensure sterility.

Question 5

The primary reason for clients to perform a pre-procedural rinse before undergoing oral health care is to:

Accepted Answer

The primary reason to use a pre - procedural rinse is to reduce microbial load in aerosols that may be inhaled by an OHCW.

Question 6

What is the maximum level of bacteria that the EPA allows in dental unit water?

Accepted Answer

The maximum level of bacteria allowed by the EPA is 500 colony-forming units per milliliter ( CFU/ mL) . This level is the allowable level for potable (drinking) water.

Question 7

To prevent cross-contamination, the practice of using a cotton roll taped to the bracket tray for wiping debridement instruments instead of a gauze square wrapped around the finger is considered:

Accepted Answer

Work practice controls are procedures that reduce the likelihood of exposure to potentially infectious materi als.

Question 8

All of the following methods inhibit the formation of biofilm in dental unit waterlines (DUWLs) EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

Flushing waterlines helps reduce planktonic bacteria but does not significantly reduce biofilm in DUW.

Question 9

How often should biologic indicators be used to test sterilizing equipment? Biologic monitors should be used once every:

Accepted Answer

Biologic monitors are recommended for use on a weekly basis to test for sterility.

Question 10

In most cases, what is the number of bacteria in the water exiting from an untreated dental unit water line?

Accepted Answer

The numb er of bacteria in untreated DUWs is always considerably higher than in drinking water because of the accumulation of biofilm in small- diameter DUW s .

Quiz 10: Prevention of Disease Transmission in Oral Health Care