Dentures Chapter 10 Question and answers already passed 2024/2025
3 views 0 purchase
Course
BOXING AND EXPRESSION
Institution
BOXING AND EXPRESSION
Dentures Chapter 10 Question and answers already passed 2024/2025 Dentures Chapter 10
What is the principal constituent of both dental plasters and dental stones? - correct answer Calcium sulfate hemihydrate
How do dental plasters and dental stones differ? - correct answer Two different f...
Dentures Chapter 10
What is the principal constituent of both dental plasters and dental stones? -
correct answer ✔Calcium sulfate hemihydrate
How do dental plasters and dental stones differ? - correct answer ✔Two
different forms (alpha and beta) differing in crystallite size, surface area and
lattice perfection
Dental *stone* is the *alpha form* which is composed of: - correct answer
✔Regularly shaped grains with low porosity and requires less water for a
satisfactory mix than the beta form. It is denser and has more superior
physical properties
Dental *plaster* is the *beta form* which is composed of - correct answer
✔irregularly shaped grains and porous character
What is the basis for the classification system used in the American Dental
Association specification for dental gypsum products? - correct answer
✔Based on their *particle shape and compactness.*
What are the designations for the four types of dental gypsum products? -
correct answer ✔Type I: plaster, impression
Type II: plaster, cast
Type III: dental stone
Type IV: dental stone, high strength
What are the main differences between Type III and Type IV dental gypsum
products? - correct answer ✔Type IV has *more compact and smoother
particles*, resulting in a *lower surface area*. Therefore, less water can be
, used to mix Type IV, and the dry strengths of Type IV are generally *greater*
than those of Type III dental stones.
What type of dental stone is used to pour edentulous master casts during
complete denture fabrication? Why is this type of dental stone used? - correct
answer ✔*Type III dental stone* is used to pour edentulous master casts
because it provides sufficient strength to resist master cast alteration or
damage during clinical and laboratory procedures while fabricating dentures
without making it too difficult to remove the dentures after denture base
polymerization.
Why are edentulous master impressions boxed? - correct answer ✔(1) To
preserve the border contours of the master impression
(2) Control the size and shape of the base of the master cast
(3) Produce a dense master cast by vibrating minimum expansion dental
stone into the boxed master impression
(4) To conserve denture stone.
What are the two most common methods of boxing edentulous master
impressions? - correct answer ✔(1)The wax boxing method and (2) the
plaster and pumice boxing method
What is the *recommended method for boxing edentulous master
impressions*? Why is this method for boxing edentulous master impressions
recommended? - correct answer ✔The *plaster and pumice boxing method*-
because it is excellent for impressions made with *elastomeric impression
materials* and equally well for *zinc-oxide impression material.*
How are the best possible physical properties of a particular dental stone
achieved? - correct answer ✔It is necessary to *proportion the stone by
weight*, and mix the stone with the amount of water specified by the
manufacturer. (*mix correct ratio of water & powder*)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller flyhigher329. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
