DENTAL ASSISTANT LICENSURE EXAM MN
PRACTICE REVIEW 2026 TESTED QUESTIONS
◉ What would you do if a patient has had too much nitrous?
Answer: Give 100% oxygen
◉ True or False: Nitrous is a toxic substance Answer: True
◉ What is the purpose of nitrous? Answer: To raise a patients
threshold
◉ What is the most common minimum level of oxygen when using
nitrous? Answer: 30%
◉ What kind of patient should NOT have nitrous? Answer: A patient
on psychiatric care
◉ What is a contraindication of nitrous? Answer: Patient with upper
resp infection
◉ During N2O administration, titration is used to Answer:
determine the concentration of N2O
,◉ Diffusion Hypoxia Answer: When N2O exits the body faster than
O2 can replace it
◉ What is a possible negative effect of nitrous for a patient? Answer:
Diffusion hypoxia, a side effect is head aches
◉ How do you prevent diffusion hypoxia? Answer: Give 100%
oxygen for 5 minutes after administering N2O
◉ Nitrous is best described as Answer: tasteless or sweet tasting
◉ The flow meter on the nitrous unit Answer: indicates the amount
of gas being delivered to the patient
◉ True or False: Once completed with nitrous, the patient should
breath 100% oxygen for 5 minutes Answer: True
◉ What is the best way to prevent gagging during an impression or
xrays? Answer: Topical
◉ When taking a lower impression, what occlusal plane is parallel to
the floor? Answer: Lower
, ◉ Why do you remove the impression with a quick snap? Answer:
To prevent distortion
◉ How would you get an accurate impression of the vestiubule?
Answer: Put wax on the tray
◉ For strength and accuracy when pouring a final impression you
should use what? Answer: Correct water to powder ratio
◉ What would cause imbibition? Answer: An impression being left
in a wet paper towel too long.
◉ What is the best disinfectant for alginate? Answer:
Gluteraldehyde, Iodophers
◉ What is the best way to eliminate bubbles in an impression?
Answer: Paint occlusals
◉ How would you correct an impression that is 3mm short of the
retro molar pad? Answer: Move the tray more posterior
◉ If the impression perforates the bottom of the tray that means
Answer: It was too small
PRACTICE REVIEW 2026 TESTED QUESTIONS
◉ What would you do if a patient has had too much nitrous?
Answer: Give 100% oxygen
◉ True or False: Nitrous is a toxic substance Answer: True
◉ What is the purpose of nitrous? Answer: To raise a patients
threshold
◉ What is the most common minimum level of oxygen when using
nitrous? Answer: 30%
◉ What kind of patient should NOT have nitrous? Answer: A patient
on psychiatric care
◉ What is a contraindication of nitrous? Answer: Patient with upper
resp infection
◉ During N2O administration, titration is used to Answer:
determine the concentration of N2O
,◉ Diffusion Hypoxia Answer: When N2O exits the body faster than
O2 can replace it
◉ What is a possible negative effect of nitrous for a patient? Answer:
Diffusion hypoxia, a side effect is head aches
◉ How do you prevent diffusion hypoxia? Answer: Give 100%
oxygen for 5 minutes after administering N2O
◉ Nitrous is best described as Answer: tasteless or sweet tasting
◉ The flow meter on the nitrous unit Answer: indicates the amount
of gas being delivered to the patient
◉ True or False: Once completed with nitrous, the patient should
breath 100% oxygen for 5 minutes Answer: True
◉ What is the best way to prevent gagging during an impression or
xrays? Answer: Topical
◉ When taking a lower impression, what occlusal plane is parallel to
the floor? Answer: Lower
, ◉ Why do you remove the impression with a quick snap? Answer:
To prevent distortion
◉ How would you get an accurate impression of the vestiubule?
Answer: Put wax on the tray
◉ For strength and accuracy when pouring a final impression you
should use what? Answer: Correct water to powder ratio
◉ What would cause imbibition? Answer: An impression being left
in a wet paper towel too long.
◉ What is the best disinfectant for alginate? Answer:
Gluteraldehyde, Iodophers
◉ What is the best way to eliminate bubbles in an impression?
Answer: Paint occlusals
◉ How would you correct an impression that is 3mm short of the
retro molar pad? Answer: Move the tray more posterior
◉ If the impression perforates the bottom of the tray that means
Answer: It was too small
