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

Steam autoclave sterilization is the gold standard because it reliably kills all microorganisms including spores at 121–134°C under pressure.

Question 2

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

Accepted Answer

Steam autoclave sterilization

Answer

The CDC recommends that dental handpieces be heat-sterilized (autoclaved) between patients, not just disinfected, because they contact mucous membranes.

Question 3

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

Accepted Answer

Geobacillus stearothermophilus

Answer

Geobacillus stearothermophilus spores are used as the biological indicator for steam sterilization because of their high heat resistance.

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

Each sterilization pouch must be inspected before use to confirm the chemical indicator has changed color and the seal is intact, ensuring the item was properly processed.

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

Heavy-duty utility gloves, mask, eye protection, and protective gown are required during instrument scrubbing to protect against punctures, splashes, and aerosols from contaminated instruments.

NDECC - National Dental Examination of Clinical Competence Practice Test

NDECC - National Dental Examination of Clinical Competence Practice Test

NDECC Infection Control and Sterilization