Infection Control Flashcards

Which CDC transmission-based precaution category applies to tuberculosis (TB) in a dental setting?

Answer: Airborne precautions

TB requires airborne precautions because M. tuberculosis is spread via small respiratory droplet nuclei that remain suspended in air.

What is the minimum temperature required for steam autoclave sterilization at standard pressure (15 psi)?

Answer: 250°F (121°C)

Standard gravity-displacement steam autoclaves operate at 121°C (250°F) at 15 psi for a minimum of 15–30 minutes.

A dental assistant recaps a needle after an injection. Which technique is the SAFEST recapping method if recapping is necessary?

Answer: Using a needle cap holder device

A needle cap holder (mechanical recapping device) is the safest option; if unavailable, the one-handed scoop technique is preferred over two-handed recapping.

Which of the following is classified as a critical dental instrument?

Answer: Periodontal probe

Critical instruments penetrate soft tissue or bone and must be heat-sterilized; the periodontal probe contacts subgingival tissue and bone.

What does the term 'dental unit waterline biofilm' refer to?

Answer: A microbial community that forms on the interior surfaces of water delivery tubing

Dental unit waterline biofilm is a structured community of microorganisms attached to the inner walls of narrow-bore water tubing, potentially contaminating water sprayed on patients.

Which personal protective equipment (PPE) should be removed FIRST when leaving a contaminated operatory?

Answer: Gloves

Gloves are removed first to prevent transferring contaminants to other PPE or surfaces during doffing.

How often should dental handpiece waterlines be flushed at the beginning of each clinical day?

Answer: 2 minutes

CDC guidelines recommend flushing handpiece waterlines for at least 2 minutes at the beginning of each day to reduce microbial contamination.