Physical/Chemical Safety
Which of the following is NOT a recommended safety practice when using electrical equipment in the dental lab?
a) Keeping equipment in good working order
b) Following the manufacturer’s instructions
c) Leaving equipment turned on when not in use
d) Being aware of fire hazards
c) Leaving equipment turned on when not in use
True or False: Items brought into the laboratory from the treatment room are always free from contamination.
False
b) Eating or drinking
What type of heat sources may be used in the dental laboratory?
Propane or butane torches and Bunsen burners connected to gas lines.
What should always be done before leaving the laboratory?
Turn off all equipment and clean the work area.
When should contaminated items be disinfected in the laboratory?
a) Only before use
b) Only after use
c) Before and after each use
d) Only if visible debris is present
c) Before and after each use
Why must hair be kept pulled back when working in the dental laboratory?
To prevent contamination and reduce the risk of accidents involving equipment.
Which of the following statements about heat sources in the lab is correct?
a) A gas line should be left slightly open to prevent buildup
b) A propane or butane torch may be used to heat materials
c) Gas leaks are not a concern in a well-ventilated area
d) It is safe to leave a torch burning unattended
b) A propane or butane torch may be used to heat materials
Which of the following types of hazardous substances may be present in the dental laboratory? (Select all that apply)
a) Corrosive substances
b) Toxic chemicals
c) Carcinogenic materials
d) Radioactive isotopes
a, b, c
What types of biohazards might be found on impressions or other items brought into the lab?
Blood and saliva, which can carry infectious diseases.
b) Report it to the dentist immediately
Why is it important to fully turn a gas line on or off when using a Bunsen burner?
Propane or butane torches and Bunsen burners connected to gas lines.
Why is it important to be familiar with the location of the fire extinguisher and fire escape routes in the dental lab?
To ensure quick response in case of a fire emergency and allow for safe evacuation.
Which of the following best describes why OSHA considers the dental lab a potentially dangerous setting?
a) The lab contains only chemical hazards
b) Materials and equipment can pose risks if not handled properly
c) There are no real risks if safety rules are followed
d) Only biohazards are a concern
b) Materials and equipment can pose risks if not handled properly
What precautions should be taken when handling hazardous chemicals in the lab?
Avoid direct contact, use proper PPE, ensure good ventilation, and follow manufacturer instructions.