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