Term
True/ false
alginate material is easy to use? |
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Definition
| True alginate is easy to use |
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Term
| impression materials that have mechanical properties permitting considerable elastic deformation but that returns to origional form are? |
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Definition
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Term
| when told to take impressions, if you are consumed with conversation and use warm water what will happen. |
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Definition
| using warm water when taking impressions will result in a shorter gelation time |
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Term
| what are some examples of aqueous elastomeric dental materials? |
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Definition
alginate- irreversible hydrocolloid
agar-reversible hydrocolloid |
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Term
| the brown paste in rubber base is called |
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Definition
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Term
| dental compression compound is known as what type of material |
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Definition
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Term
which of the following is and example of an inelastic impression material?
a. polysulfide
b.Zoe impression paste
c. alginate
d. additional silicone |
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Definition
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Term
| the term used for the setting of hydrocolloid impression materials is? |
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Definition
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Term
| the popularity of agar impression materials is limited by what? |
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Definition
| need for special equipment |
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Term
| when an agar impression slightly contracts and exude water this is termed? |
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Definition
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Term
true/ false
additional silicones are the most popular type of rubber impressions.
true/false
the reason is the cost |
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Definition
true add. silicones are most popular
false- the reason is not the cost |
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Term
true/ false
custom impression trays are made on a model of the patients arch.
true / false
therefore, to make a custom tray an alginate impression is also needed. |
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Definition
both statements are true
custom trays are made on a model of patients arch, and alginate is needed. |
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Term
| the impression tray that is used to record the prepared tooth, a bite registration, and impression of opposing teeth is called? |
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Definition
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Term
| what material is set by physical means |
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Definition
|
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Term
|
Definition
| records occlusal surfaces of both arches |
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Term
|
Definition
2 phases
-solid carbohydrate polymer network (like soap creating foam)
-then water traps in pockets (like air in foam soap creating bubbles) |
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Term
|
Definition
| melting and gelling at different temps. |
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Term
|
Definition
| hydrocolloid will absorn water, swell and distort |
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Term
|
Definition
| solution of one material dissolved in another |
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Term
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Definition
| reduce contact angle of mixed gypsum, wetting is increased and bubbles are decreased. |
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Term
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Definition
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Term
| what is a hydrophobic dental material |
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Definition
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Term
| irreversible hydrocolloid |
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Definition
| alginate does reverse to sol, but not gel state |
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Term
|
Definition
| agar reverses back to sol when heated and gel when cooled. |
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Term
|
Definition
| 2 pastes that form together |
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Term
| inelastic impression materials include? |
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Definition
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|
Term
| aqueous elastomeric impressions include? |
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Definition
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|
Term
| non aqueous elastomeric impressions include |
|
Definition
polysulfides
condensation silicones
polyethers
additional silicones |
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