NDECC Infection Control and Sterilization

Question 1

Which sterilization method is considered the gold standard for heat-stable dental instruments?

Accepted Answer

Steam autoclave sterilization

Answer

Dry heat sterilization

Answer

Chemical vapor sterilization

Answer

Ethylene oxide sterilization

Question 2

According to CDC guidelines, dental handpieces should be cleaned and sterilized between patients using which process?

Accepted Answer

Steam autoclave sterilization

Answer

High-level disinfection

Answer

Intermediate-level disinfection

Answer

Surface disinfection only

Question 3

What is the appropriate biological indicator (spore test) organism used to verify steam autoclave sterilization?

Accepted Answer

Geobacillus stearothermophilus

Answer

Bacillus cereus

Answer

Bacillus subtilis

Answer

Clostridium difficile

Question 4

When should sterilization pouches be inspected before use on a patient?

Accepted Answer

Before each use to check chemical indicator and pouch integrity

Answer

Only if the pouch appears visibly damaged

Answer

At the start of each clinic day as a batch

Answer

Only when the autoclave cycle log shows an error

Question 5

Which level of personal protective equipment (PPE) is required when manually scrubbing contaminated dental instruments before sterilization?

Accepted Answer

Heavy-duty utility gloves, mask, eye protection, and gown

Answer

Gloves only

Answer

Mask and gloves only

Answer

Standard examination gloves and mask

Question 6

An ultrasonic cleaner is used in the instrument reprocessing area primarily to:

Accepted Answer

Remove bioburden from instruments before sterilization

Answer

Sterilize instruments using high-frequency sound waves

Answer

Disinfect instruments to a high level

Answer

Replace the need for autoclave sterilization for low-risk items

Question 7

Which of the following surfaces in the dental operatory is classified as a 'clinical contact surface' requiring disinfection or barrier protection between patients?

Accepted Answer

Dental unit light handle

Answer

Waiting room chairs

Answer

Sterilization area countertop

Answer

Reception desk keyboard