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Dental Materials Final Study Guide
List the three types of impressions that would be taken in a dental office.
preliminary
final
occlusal
Describe the types of impression trays and their characteristics of use.
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.
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.
polysulfide- long working setting time
polyether- better mechanical
polysiloxane- high stability, low odor, low tear resistance
silicane- condensation easy mix
Describe the importance of an occlusal registration and its use.
accurate impression of the prepared teeth
A(n) ________ is a gelatinous material used to obtain impressions.
Colloid
__________ is the process of using your fingers to achieve a closer adaptation of the
edges of an impression.
border molding
A(n) ________ material has elastic properties and is made from rubber.
Elastomeric
A foundation or basic ingredient of a material is the ________.
Base
To have something _____ is to have it centered, such as your maxillary teeth centered
over your mandibular teeth.

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