ADEX Infection Control and Safety 3

Question 1

Which type of sterilization monitoring provides the most definitive proof that sterilization conditions were met?

Accepted Answer

Biological indicator (spore test)

Answer

Biological indicators using Geobacillus stearothermophilus spores provide the gold standard proof that all sterilization parameters were achieved.

Question 2

Environmental surface disinfectants used in dentistry must be EPA-registered as:

Accepted Answer

Hospital disinfectants

Answer

The CDC recommends EPA-registered hospital disinfectants for decontamination of clinical contact surfaces in dental settings.

Question 3

What is the correct sequence for processing reusable dental instruments?

Accepted Answer

Clean → package → sterilize → store

Answer

Instruments must be cleaned to remove bioburden first, then packaged, then sterilized, and finally stored for use.

Question 4

Which personal protective equipment must be changed between patients or when visibly soiled?

Accepted Answer

Gloves

Answer

Gloves are single-use items that must be changed between every patient and whenever torn, punctured, or visibly contaminated.

Question 5

Dental unit waterlines can harbor biofilm primarily composed of which organism?

Accepted Answer

Pseudomonas aeruginosa and other water bacteria

Answer

Dental unit waterlines commonly harbor biofilm of environmental bacteria such as Pseudomonas aeruginosa, Legionella, and other waterborne organisms.

ADEX - Dental Hygiene Exam Practice Test