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Dental Materials Midterm

78 cards·by PKlenkeDA
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cast
replica of hard and soft tissues of patients oral cavity from gypsum products
model plaster
weekest and most porus.
dental stone
stronger and less ports. Dies
model plaster
weekest and most porus.
dental stone
stronger and less ports.
Dies
replicas of the prepared teeth that are generally used from working casts.
Die Stone
densest form of gypsum.
working casts
casts made from dental stone that are strong enough to resist stress of fabricating an indirect restoration.
melting range
range of melting points of the individual components of wax.
diagnostic cast
positive replica of teeth and commonly called study models.
colloid
composed of two or more substances in which one substance is suspended within another substance. hydrocolloid
reversible hydrocolloid
an agar impression material that can be heated to change a gel into a fluid sol state. irreversible hydrocolloid
agar
a powder derived from seaweed.
hysteresis
property of a material to have two different temperatures for melting and solidifiying.
syneresis
a characteristic of gels to contract and squeeze out some liquid that then accumulates on the surface.
condensation silicone
silicone rubber impression that sets by linking molecules in long chains but produces a liquid.
wetting
degree to which liquid adhesive is able to spread over a surface of tooth.
viscosity
ability of liquid to flow.
film thickness
minimum thickness obtainable by a layer of material.
microleakage
when bacteria enters the interface.
Stock Trays
metal or plastic and can be solid or perforated.
custom trays
made and lab and cured.
Triple Tray
takes both arches along with bite registration.
solid trays
raised borders on internal surface and lock in the impression material.
what is the chemical name for gypsum
calcium sulfate dihydrate.
what factors affect the size and strength and hardness of gypsum products
1) size and shape 2) porosity 3) amount of water.
what are the five types of classification of gypsum
1) impression plaster-final impressions 2) model plaster-diagnostic casts 3) Dental stone-dentures
what accelerates gypsum
1) KSO4 2) slurry 3) water.
What are gypsum retardants
1) blood 2) saliva 3) alginate.
what are dental waxes composed of
plants
what is added to waxes to produce the desirable physical properties
synthetic waxes
what is inlay wax used for
produce patterns for metal castings.
what is casting wax used for
construct framework for partial and complete dentures.
what is baseplate wax used for
produce form on which denture teeth are set.
what ensures proper set up of gypsum material
borax and agar.
what in an anti fungal used in reversible hydrocolloid
alkyl benzoate.
what ensures proper set time of gypsum
KSO4.
model plaster
weekest and most porus.
dental stone
stronger and less ports.
Dies
replicas of the prepared teeth that are generally used from working casts.
Die Stone
densest form of gypsum.
working casts
casts made from dental stone that are strong enough to resist stress of fabricating an indirect restoration.
melting range
range of melting points of the individual components of wax.
diagnostic cast
positive replica of teeth and commonly called study models.
colloid
composed of two or more substances in which one substance is suspended within another substance. hydrocolloid
reversible hydrocolloid
an agar impression material that can be heated to change a gel into a fluid sol state. irreversible hydrocolloid
agar
a powder derived from seaweed.
hysteresis
property of a material to have two different temperatures for melting and solidifiying.
syneresis
a characteristic of gels to contract and squeeze out some liquid that then accumulates on the surface.
condensation silicone
silicone rubber impression that sets by linking molecules in long chains but produces a liquid.
wetting
degree to which liquid adhesive is able to spread over a surface of tooth.
viscosity
ability of liquid to flow.
film thickness
minimum thickness obtainable by a layer of material.
microleakage
when bacteria enters the interface.
Stock Trays
metal or plastic and can be solid or perforated.
custom trays
made and lab and cured.
Triple Tray
takes both arches along with bite registration.
solid trays
raised borders on internal surface and lock in the impression material.
what is the chemical name for gypsum
calcium sulfate dihydrate.
what factors affect the size and strength and hardness of gypsum products
1) size and shape 2) porosity 3) amount of water.
what are the five types of classification of gypsum
1) impression plaster-final impressions 2) model plaster-diagnostic casts 3) Dental stone-dentures
what accelerates gypsum
1) KSO4 2) slurry 3) water.
What are gypsum retardants
1) blood 2) saliva 3) alginate.
what are dental waxes composed of
plants
what is added to waxes to produce the desirable physical properties
synthetic waxes
what is inlay wax used for
produce patterns for metal castings.
what is casting wax used for
construct framework for partial and complete dentures.
what is baseplate wax used for
produce form on which denture teeth are set.
what ensures proper set up of gypsum material
borax and agar.
what in an anti fungal used in reversible hydrocolloid
alkyl benzoate.
what ensures proper set time of gypsum
KSO4.
list the 5 parts of a chemical hazardous communication programs
written programs
what are the 3 types of inelastic impression materials
dental impression
what is impression compound used for
making preliminary impressions for complete dentures.
what are the physical properties of impression compound
softens at 140 and hardens at 98
how often is impression plaster used today andy why
seldom due to the complex technique.
what are the 4 types of elastomers
ploysulfide
what is polymer used in dentistry
acrylic resins.