CDC Safety & Infection Control 2

Question 1

Which respiratory protection device is required when grinding or polishing dental ceramics to prevent silica dust inhalation?

Accepted Answer

N95 respirator

Answer

An N95 respirator filters at least 95% of airborne particles including fine silica and ceramic dust generated during grinding.

Question 2

What is the recommended method for handling sharp ceramic fragments in the dental lab to prevent injury?

Accepted Answer

Use forceps or tongs rather than fingers

Answer

Forceps or tongs should be used to handle sharp ceramic fragments to avoid lacerations and potential exposure to biohazardous material.

Question 3

How should contaminated dental impressions and restorations be decontaminated before entering the dental laboratory?

Accepted Answer

Disinfect with an appropriate EPA-registered disinfectant at chairside

Answer

The ADA and CDC recommend that all laboratory items be disinfected chairside with an EPA-registered disinfectant before transport to the dental lab.

Question 4

Which of the following is the correct order of donning personal protective equipment (PPE) in the dental laboratory?

Accepted Answer

Gown, mask, eye protection, gloves

Answer

The correct donning sequence is gown first, then mask or respirator, then eye protection, and finally gloves to maintain contamination control.

Question 5

What type of ventilation system is most effective for controlling airborne ceramic dust in a dental laboratory?

Accepted Answer

Local exhaust ventilation at the point of dust generation

Answer

Local exhaust ventilation (LEV) captures dust directly at the source, providing superior protection compared to dilution ventilation methods.

(CDC) Certified Dental Ceramist Practice Test