dental materials final study material
List the three types of impressions that would be taken in a dental office. -
correct answer ✔preliminary
final
occlusal
Describe the types of impression trays and their characteristics of use. -
correct answer ✔quadrant trays- impressions of specific quadrant of mouth
section trays- impressions of specific sections of the mouth
full arch- impression of the maxillary or mandibular arches of the mouth
Discuss hydrocolloid impression materials, and describe their use, and
application of material. - correct answer ✔hydrocolloid meaning water a
gelatinous substance
solid changed by chemical changes/ factor
Discuss elastomeric impression materials, and describe their use, mixing
techniques, and application of material. - correct answer ✔polysulifide- long
working setting time
polyether- better mechanical
polysiloxane- high stability, low odor, low tear resistance
silocane- condensation easy mix
Describe the importance of an occlusal registration and its use. - correct
answer ✔accurate impression of the prepared teeth
,A(n) ________ is a gelatinous material used to obtain impressions. - correct
answer ✔colloid
__________ is the process of using your fingers to achieve a closer
adaptation of the edges of an impression. - correct answer ✔border molding
A(n) ________ material has elastic properties and is made from rubber. -
correct answer ✔elastomeric
A foundation or basic ingredient of a material is the ________. - correct
answer ✔base
To have something _____ is to have it centered, such as your maxillary teeth
centered over your mandibular teeth. - correct answer ✔centric
________ is a gelatin-type material derived from seaweed. - correct answer
✔agar
________ is the loss of water, causing shrinkage. - correct answer
✔synthesis
__________ is to bring a material to a desired temperature and consistency. -
correct answer ✔tempering
__________ describe a property of fluids with a high resistance to flow. -
correct answer ✔viscous
__________ is the material of choice in dentistry for preliminary impressions. -
correct answer ✔alginate
,__________is to transform a material from one one physical state to another.
- correct answer ✔hystorsis
______ means water. - correct answer ✔hydro
A(n) __________ is a reproduction of someone's bite with the use of wax or
elastomeric material. - correct answer ✔occlusal registration
A(n) _________ is a substance that modifies or increases the rate of a
chemical reaction. - correct answer ✔latalyst
_________ is the absorption of water, causing an object to swell. - correct
answer ✔imbibtion
An impression would be considered a ________. - correct answer ✔negative
reproduction
Of the three classifications of impressions, which of these would be
considered an expanded function for the certified dental assistant? - correct
answer ✔irreversible hydrocolliod
Which of the three classifications of impressions would be used by the dental
lab tech for the occlusal relationship? - correct answer ✔bite registration
Which type of stock tray would you select to cover half of an arch? - correct
answer ✔quadrant
, Which type of tray allows impression material to mechanically lock on? -
correct answer ✔perforated
Which type of tray is constructed to fit the mouth of a specific patient? -
correct answer ✔custom
__________ is used to extend the length of a tray to accommodate third
molars. - correct answer ✔rope wax
The organic substance of hydrocolloid material is _________. - correct
answer ✔seaweed
Why would a fast-set alginate be selected for taking a preliminary impression?
- correct answer ✔the patient has a strong gag reflex
Give the powder/water ratio for a maxillary impression. - correct answer ✔3
scoops of powder to 3 measures or water
Hydro means ________. - correct answer ✔water
Another name for irreversible hydrocolloid is ___________. - correct answer
✔alginate
How is irreversible hydrocolloid mixed? - correct answer ✔mixing bowl
Where is the reversible hydrocolloid material placed before the impression is
taken? - correct answer ✔patient tray
List the three types of impressions that would be taken in a dental office. -
correct answer ✔preliminary
final
occlusal
Describe the types of impression trays and their characteristics of use. -
correct answer ✔quadrant trays- impressions of specific quadrant of mouth
section trays- impressions of specific sections of the mouth
full arch- impression of the maxillary or mandibular arches of the mouth
Discuss hydrocolloid impression materials, and describe their use, and
application of material. - correct answer ✔hydrocolloid meaning water a
gelatinous substance
solid changed by chemical changes/ factor
Discuss elastomeric impression materials, and describe their use, mixing
techniques, and application of material. - correct answer ✔polysulifide- long
working setting time
polyether- better mechanical
polysiloxane- high stability, low odor, low tear resistance
silocane- condensation easy mix
Describe the importance of an occlusal registration and its use. - correct
answer ✔accurate impression of the prepared teeth
,A(n) ________ is a gelatinous material used to obtain impressions. - correct
answer ✔colloid
__________ is the process of using your fingers to achieve a closer
adaptation of the edges of an impression. - correct answer ✔border molding
A(n) ________ material has elastic properties and is made from rubber. -
correct answer ✔elastomeric
A foundation or basic ingredient of a material is the ________. - correct
answer ✔base
To have something _____ is to have it centered, such as your maxillary teeth
centered over your mandibular teeth. - correct answer ✔centric
________ is a gelatin-type material derived from seaweed. - correct answer
✔agar
________ is the loss of water, causing shrinkage. - correct answer
✔synthesis
__________ is to bring a material to a desired temperature and consistency. -
correct answer ✔tempering
__________ describe a property of fluids with a high resistance to flow. -
correct answer ✔viscous
__________ is the material of choice in dentistry for preliminary impressions. -
correct answer ✔alginate
,__________is to transform a material from one one physical state to another.
- correct answer ✔hystorsis
______ means water. - correct answer ✔hydro
A(n) __________ is a reproduction of someone's bite with the use of wax or
elastomeric material. - correct answer ✔occlusal registration
A(n) _________ is a substance that modifies or increases the rate of a
chemical reaction. - correct answer ✔latalyst
_________ is the absorption of water, causing an object to swell. - correct
answer ✔imbibtion
An impression would be considered a ________. - correct answer ✔negative
reproduction
Of the three classifications of impressions, which of these would be
considered an expanded function for the certified dental assistant? - correct
answer ✔irreversible hydrocolliod
Which of the three classifications of impressions would be used by the dental
lab tech for the occlusal relationship? - correct answer ✔bite registration
Which type of stock tray would you select to cover half of an arch? - correct
answer ✔quadrant
, Which type of tray allows impression material to mechanically lock on? -
correct answer ✔perforated
Which type of tray is constructed to fit the mouth of a specific patient? -
correct answer ✔custom
__________ is used to extend the length of a tray to accommodate third
molars. - correct answer ✔rope wax
The organic substance of hydrocolloid material is _________. - correct
answer ✔seaweed
Why would a fast-set alginate be selected for taking a preliminary impression?
- correct answer ✔the patient has a strong gag reflex
Give the powder/water ratio for a maxillary impression. - correct answer ✔3
scoops of powder to 3 measures or water
Hydro means ________. - correct answer ✔water
Another name for irreversible hydrocolloid is ___________. - correct answer
✔alginate
How is irreversible hydrocolloid mixed? - correct answer ✔mixing bowl
Where is the reversible hydrocolloid material placed before the impression is
taken? - correct answer ✔patient tray
