When taking alginate impressions, having the patient swish with a mouth rinse such as
Listerine prior to impressing helps decrease all of the following except:
a: drooling by the patient
B: microorganisms on the impression
C: gagging by the patient
D: bubbles in the material
-:- a: Drooling...
As a right handed operator, when seating the mandibular impression, you want to be
standing at the side of the patient, near 8-9 o'clock. When seating the maxillary impression,
you will want to be behind the patients head, near 11-12 o'clock.
True
False
✓ -:- TRUE
When might the fabrication of a custom tray be necessary?
A: the stock trays do not fit the patients mouth properly
B: the patient is edentulous
C: the patient needs whitening trays
D: the patient needs a specific orthodontic appliance
E: all of the above
✓ -:- E: all of the above
The purpose for the perforations in the impression trays is:
A; to allow the impression material to flow out of the perforations B: creating a mechanical
lock between the impression and the tray
to allow for easier cleaning of the trays
C: to allow air to escape in order to reduce the amount of bubbles in the impression
D: to help reduce gagging by allowing excess material out of the mouth
4|P a g e | G r a d e A + | 2 0 2 0 2 5
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