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42 Cards in this Set

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tooth colored plastic, insoluble, still issues with shrinkage, expansion
resin
filler particles reduce volume of plastic and reduce problems but particles not bonded resulting in staining and poor wear resistance
BEGINNING OF COMPOSITES
RESIN and inorganic filler
is silane a chemical or mechanical bond
chemical
I/A in Self cure
i: benzoyl peroxide
a: tertiary amine
I/A in Light Cure
I: Camphoroquinone
A: Light
which glass particles provide radiopacity?
barium and strontium
traditional conventional class usage?
diastemas and class IV
microfilled class usage?
III, V
hybrids class usage?
I,II,III,IV,V and sealant
larger bulk increment will ?
shrink more
light cure, material will shrink in what direction?
in direction of light, away from cavity walls
what do amines do?
decrease color stability
what do darker shades require
longer light exposure due to coloring agents impeding light flow
enamel bonding acid etch is chemical or mechanical bond
mechanical between restoration and tooth
how much is enamel mineralized ?
96%
when you clean tooth you do what?
raise surface energy
what type of acid/etch do we use on enamel?
unfilled hydrophobic resin
what percentages of what make up dentin?
50% inorganic minerals,
30 % organic minerals (collagen fibers)
20 % fluid
dentin is hydrophillic or hydrophobic?
hydrophilic
prodcued by activity of caries causing bacteria and by cutting action of burs and instruments in cleaning and preping tooth for restoration
smear layer
what are 3 parts in dentin bonding procedure?
conditioner,
primer,
adhesive
cleans smear layer, preps inorganic portion of dentin
conditioner
bifunctional monomer with one side that is hydrophillic for dentin and other that is hydrophobic for resin restorative
primer
a hybrid layer of collagen mesh, decalcified dentin, and resin
adhesive
what is done for enamel but not dentin?
drying
very mild acid solutions that dont have to be washed off before application of primer and adhesive agent
self etching which the conditioner for dentin
bigger the mass... more it will what?
shrink
problems with posterior composites?
wear
integrity of margin
contour extent of the contact
problems with post composites are overcome by
new materials
case selection
new dentin bonding technique
indirect/ direct materials
uses of GI
cement, liner , base , restorative
very mild acid solutions that dont have to be washed off before application of primer and adhesive agent
self etching which the conditioner for dentin
bigger the mass... more it will what?
shrink
problems with posterior composites?
wear
integrity of margin
contour extent of the contact
problems with post composites are overcome by
new materials
case selection
new dentin bonding technique
indirect/ direct materials
uses of GI
cement, liner , base , restorative
what dictates use of GI
size of glasss particles
is glasss ionomer a chemical or mechanical bond to tooth
chemical bond
problem with GI?
poor wear resistance
what material has a "rechargeable" flouride rls?
GI
add particles of silver amalgam to increase strength, good for build ups
metal modified glass ionomers
pt composite/ pt ionomer
more like GI
like GI with dual cure so better wear resistance
little fl rls
resin modified glass ionomer
pt composite pt ionomer
more like composite
more useful as restorative in the select cases (deciduous teeth)
little fl rls
compomers