Dental Materials Ch 15 Questions with complete solution 2024/2025
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Course
GYPSUM AND WAX
Institution
GYPSUM AND WAX
Dental Materials Ch 15 Questions with complete solution 2024/2025 Dental Materials Ch 15 & 16
Which of the following is an inelastic impression material?
Zinc oxide eugenol
(T/F): Polyether can stay dimensionally stable for 2 weeks. It is hydrophilic and can absorb disinfecting solutions
...
Dental Materials Ch 15 & 16
Which of the following is an inelastic impression material?
Zinc oxide eugenol
(T/F): Polyether can stay dimensionally stable for 2 weeks. It is hydrophilic
and can absorb disinfecting solutions
Both statements are TRUE
(T/F): Polysulfides are still used for complete denture impressions.
TRUE
**Polysulfides usually require custom trays, must be used in a dry
environment (hydrophobic; will not flow in areas of moisture), stinky sulfur
smell, tear strength is 8x that of hydrocolloids, and they're messy to work with
& hard to clean up (orange solvent)
(T/F): Racemic epinephrine hemostatic agents can cause blood pressure
spikes.
TRUE
(T/F): Wax bite registrations are the most dimensionally stable.
FALSE
,What kinds of gloves should be worn when mixing polyvinyl siloxane putty?
Vinyl
(T/F): Extra alginate should be added to the tray for the patient with a deep
palatal vault. Solid rim lock impression trays do not require adhesive.
Both statements are FALSE; Wax should be added to the midpalatal section
of maxillary trays for patients with vaulted palates. Extra alginate could cause
excess to flow back and cause gagging. Rim lock impression trays that are
solid should have adhesive applied to keep the alginate from pulling free.
(T/F): A retraction cord should always fit end-to-end when placed in the
sulcus.
FALSE
(T/F): Digital impressions do not require gingival retraction. The impression
process is much easier for patients with digital impressions.
The first statement is FALSE, the second statement is TRUE
Your patient is claustrophobic and has a strong gag reflex. You need a final
impression material with pleasant characteristics. Which material would you
not chose?
, Polysulfide
The practice you work in is located in Denver. You are sending a final
impression to a lab in Seattle to have a gold crown made. Which final
impression material would you not choose due to transit time?
Condensation silicone (must be poured immediately)
You are selecting a tray for a mandibular alginate impression. The tray should
extend to which of the following to ensure inclusion of proper anatomy?
The retromolar pad
Which of the following is used as a hemostatic agent?
Ferric sulfate
Alginate materials are which of the following?
Irreversible hydrocolloids
(T/F): Syneresis is the update of fluid by an impression material.
FALSE
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