Dental Materials - Chapter 8 - Impression
Materials
1. Aliginate
2. Agar - ANSWER-Some examples of Aqueous Elastomeric impression material are __?
1. As two pastes in a tube to which you mix the two on a paper liner.
2. Using a spatula, mix the two together swirling first, then mix into a uniform color. (i.e. Mix them like a
fudge swirl cake at first, then mix altogether.) - ANSWER-How are Nonaqueous elastomeric impression
material supplied?
1. Cheap
2. Neat
3. Easy to use
4. Comes in a variety of forms & consistencies
-hard, like a paraffin wax
-some moldable at room temp
5. It is very accessible and versatile (comes in sticks, strips and tubes)
6. can be heated and then molded or temp of the mouth molds it..etc.
7. used by some dentists to take impressions for full dentures
8. also used in a lab setting for creation of crowns, bridges and other restorations. - ANSWER-What are
some advantages to suing a wax impression material?
1. EPI included
2. hemostatic material to reduce bleeding - ANSWER-What are some qualities of certain retraction
cords?
1. FLAVORS must be ADDED TO THE PLASTER IMPRESSION MATERIAL B/C OF THE BAD TASTE
2. SETS QUICKLY
3. HARD AND BRITTLE
4. USED MOSTLY FOR TAKING IMPRESSIONS ON EDENTULOUS PATIENTS FOR MAKING DENTURES -
ANSWER-What are some disadvantages of using plaster as an impression material?
1. full dentures,
2. inlays,
3. crowns,
4. bridges,
, Dental Materials - Chapter 8 - Impression
Materials
5. and some partials - ANSWER-What is a custom tray typically used for?
1. much more pleasant taste and smell
2. supplied in an automix gun, It can get high tech with baffles that mix the two gels together, along with
different tip size selections.
3. automix is popular for acrylic resins for temp. crown and bridge work. - ANSWER-What are some
advantages of using silicone when taking impressions?
1. plaster
2. Wax and impression compound
3. Zinc Oxide (ZOE) - ANSWER-Some examples of an inelastic impression material would be __?
1. Polysulfides
2. Condensation silicones
3. Polyethers
4. Addition silicones - ANSWER-Some examples of non-aqueous elastometric impression materials are?
1. temp of water used
2. temp of oral cavity
3. temp of air
4. chemical/physical reaction process - ANSWER-The set time of impression materials greatly depends of
which factors?
1. The Dentist
2. Dental Assistant II (with no epi) - ANSWER-Who can place a retraction cord?
1. They are designed to perform for a short period of time
2. can have multiple uses in comparison to amalgams and composites. - ANSWER-Why are impression
materials the BEST performing of all dental materials?
1. they work in wet environments (you do not have to have a dry field for accuracy because it is water
based, it will actually absorb some moisture in the field.) - ANSWER-An advantage of reversible and
irreversible colloids are:
1. used primarily for impressions of edentulous patients for dentures - ANSWER-ZOE is primarily used
how?
1. when an impression is hard to get
2. when a dry site is needed - ANSWER-When is a retraction cord used?
Materials
1. Aliginate
2. Agar - ANSWER-Some examples of Aqueous Elastomeric impression material are __?
1. As two pastes in a tube to which you mix the two on a paper liner.
2. Using a spatula, mix the two together swirling first, then mix into a uniform color. (i.e. Mix them like a
fudge swirl cake at first, then mix altogether.) - ANSWER-How are Nonaqueous elastomeric impression
material supplied?
1. Cheap
2. Neat
3. Easy to use
4. Comes in a variety of forms & consistencies
-hard, like a paraffin wax
-some moldable at room temp
5. It is very accessible and versatile (comes in sticks, strips and tubes)
6. can be heated and then molded or temp of the mouth molds it..etc.
7. used by some dentists to take impressions for full dentures
8. also used in a lab setting for creation of crowns, bridges and other restorations. - ANSWER-What are
some advantages to suing a wax impression material?
1. EPI included
2. hemostatic material to reduce bleeding - ANSWER-What are some qualities of certain retraction
cords?
1. FLAVORS must be ADDED TO THE PLASTER IMPRESSION MATERIAL B/C OF THE BAD TASTE
2. SETS QUICKLY
3. HARD AND BRITTLE
4. USED MOSTLY FOR TAKING IMPRESSIONS ON EDENTULOUS PATIENTS FOR MAKING DENTURES -
ANSWER-What are some disadvantages of using plaster as an impression material?
1. full dentures,
2. inlays,
3. crowns,
4. bridges,
, Dental Materials - Chapter 8 - Impression
Materials
5. and some partials - ANSWER-What is a custom tray typically used for?
1. much more pleasant taste and smell
2. supplied in an automix gun, It can get high tech with baffles that mix the two gels together, along with
different tip size selections.
3. automix is popular for acrylic resins for temp. crown and bridge work. - ANSWER-What are some
advantages of using silicone when taking impressions?
1. plaster
2. Wax and impression compound
3. Zinc Oxide (ZOE) - ANSWER-Some examples of an inelastic impression material would be __?
1. Polysulfides
2. Condensation silicones
3. Polyethers
4. Addition silicones - ANSWER-Some examples of non-aqueous elastometric impression materials are?
1. temp of water used
2. temp of oral cavity
3. temp of air
4. chemical/physical reaction process - ANSWER-The set time of impression materials greatly depends of
which factors?
1. The Dentist
2. Dental Assistant II (with no epi) - ANSWER-Who can place a retraction cord?
1. They are designed to perform for a short period of time
2. can have multiple uses in comparison to amalgams and composites. - ANSWER-Why are impression
materials the BEST performing of all dental materials?
1. they work in wet environments (you do not have to have a dry field for accuracy because it is water
based, it will actually absorb some moisture in the field.) - ANSWER-An advantage of reversible and
irreversible colloids are:
1. used primarily for impressions of edentulous patients for dentures - ANSWER-ZOE is primarily used
how?
1. when an impression is hard to get
2. when a dry site is needed - ANSWER-When is a retraction cord used?
