DANB Dental Instrument Sterilization 2

Question 1

Which sterilization method uses unsaturated chemical vapor at 270°F and 20 psi for instruments that may corrode in steam?

Accepted Answer

Unsaturated chemical vapor sterilization

Answer

Unsaturated chemical vapor sterilization operates at 270°F and 20 psi using a chemical solution instead of water, reducing corrosion on carbon steel instruments.

Question 2

What is the minimum exposure time for unwrapped instruments in a gravity displacement steam autoclave at 250°F (121°C)?

Accepted Answer

30 minutes

Answer

Unwrapped instruments at 250°F in a gravity displacement autoclave require 30 minutes because it removes air pockets less efficiently than prevacuum types.

Question 3

Which biological indicator organism is used to verify the efficacy of steam sterilization in dental settings?

Accepted Answer

Geobacillus stearothermophilus

Answer

Geobacillus stearothermophilus spores are the gold standard for steam sterilization verification because they are highly resistant to moist heat.

Question 4

During instrument reprocessing, at what stage should instruments be inspected for remaining debris or damage?

Accepted Answer

After cleaning but before packaging

Answer

Instruments should be inspected after cleaning but before packaging to identify remaining bioburden or damage before the sterilization cycle.

Question 5

What does a Class 5 integrating indicator verify during a sterilization cycle?

Accepted Answer

That all critical parameters of sterilization were met

Answer

Class 5 integrating indicators respond to all critical sterilization parameters (time, temperature, steam presence) and correlate with biological indicator results.

DANB Infection Control Exam Practice Test

DANB Infection Control Exam Practice Test

DANB Dental Instrument Sterilization 2