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what is an esthetic restorative material composed of a bonding agent and tooth colored filler particles?
what is added to composite for radiopacity? 2
barium and stronium
what are the three most common filler particles in composite?
what is the particle size of nanofill?
.001 (its like sugar)
how are composites classified? 3
- handling characteristics
- clinical application
- filler particle size
what is a hybrid composite a blend of?
micro and midfill (the jelly beans and nerds)
what are nanofilled-micro-hybrid composites a blend of?
blend of micro, midi and nanofilled particles (jelly beans, nerds and sugar)
why are microfill composites popular?
due to high polishability and ease of handling
t/f microfills require tooth support
why are hybrids popular?
due to combined strength and beauty
t/f nanofills increase polishability and compressive strength
- first part is true
- second false add no compressive strength
what is used to isolate the field and prevent salivary contamination
_____ cured composits are less porous than ____ cured
what is used to polish a composite? 2
- tin oxide
- diamond polishing paste
what is NOT used to polish a composite
how do you detect a composite overhang
is a composite direct or indirect?
is a porcelaIN an direct or indirect?
hmmm I wonder.... INdirect
what are four materials used for direct placement?
- glass ionomer cement
- resin modified glass ionomer cement
what are the six components of composite?
- ORGANIC RESIN (POLYMER) MATRIX
- INORGANIC SILICA FILLER PARTICLES
- SILANE COUPLING AGENT
what are the two actions of the silane coupling agent in the composite?
- adheres particle to matrix
- provides stronger bond between filler and resin
what is the most common organic matrix of composite resin?
what are the two components of BIS-GMA and what is it?
- glycidal methacrylate
- resin matrix of composite
filler particles in composite make organic resin ______, more _____ _____, _____ handling characteristics, and reduce ________ ______.
- wear resistant
- polymerization shrinkage
what does a higher filler content in a composite equal? 2
- more wear resistant
t/f a composite with lower filler particles makes for a weaker and less wear resistant material?
false! stronger and more wear resistant material
t/f you want lager filler particles of composite on the surface
FALSE you want SMALLER particles on the surface
what is the coupling agent of a composite?
_____ join together to create polymers
BASE=______ + composite
_____=initiator + composite
what is an example of an initiator in a base?
catalyst=______ + composite
______= activator + composite
what is an example of an activator in a catalyst
with composite polymersation a polymer to polymer is a _____ ____ to form _____ bond
what is the most common type of composite resin
t/f increments of composite are to be added at 3-4 mm
false <2 mm(less than or equal to)
hybrid macrofiller and microfiller composites are ____ and ____ ___
what is the particle size of a nanohybrid?
how much is the shrinkage reduced with a nanohybrid?
t/f a nanohybrid is weak and is dull
FALSE is strong and has a high shine
flowable composites have a ____ viscosity
where are flowable composites great to use?
what are four examples of conservative dentistry that a flowable is good for?
- proventalive resins
- class V non carious lesions
t/f flowable composites have a higher shrinkage, more wear and weaker than hygprids
where would you not use a composite restoration?
in areas of high occlusal function or high wear
what type of composite is highly viscous resins contain with high volume filler particles
where are packable composites used?
POSTERIOR teeth in HIGH function
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