Week 1 - intro to composite restorations Flashcards

1
Q

types of aesthetic restorative material (tooth colored)

A
ceramic inlays/onlays
silicate cement
acrylic resin
conventional glass ionomers
composite
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2
Q

ceramic inlays/onlays

A

fabricated in lab

can be done chairside with CAD/CAM

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3
Q

silicate cement

A

no longer used

used to use for anterior restorations

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4
Q

acrylic resin

A

use in areas where temperature change, abrasion, and stress are LIMITED because-
low strength, high polymerization shrinkage

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5
Q

conventional glass ionomers

A

release fluoride for anti-cariogenicity
used for root surface caries
DO NOT use in occlusal areas

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6
Q

why are CGI bad for use in occlusal areas?

A

low resistance to wear and low strength

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7
Q

two types of glass ionomers

A

resin-modified

compomer

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8
Q

resin modified GI

A

resin added to GI to increase physical properties
can be light cured
acid-base setting rxn

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9
Q

compomer GI

A

polyacid modified composite

composite with some GI components

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10
Q

Composite components

A

resin + inorganic filler for increased physical properties

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11
Q

what kind of bonding agent used for composites?

A

silane bonding agent

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12
Q

types of composites

A
macrofill 
microfill
hybrid composites
nanofill composites
packable composites
flowable composite
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13
Q

most popular type of composite used today

A

nanofill composite

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14
Q

nanofill composite

A

small filler particles
highly polishable
packed tight for physical properties

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15
Q

packable composites

A

most viscous
for proximal contact restorations
mimic amalgam

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16
Q

flowable composite

A

low filler content
poor physical properties
class I restorations
bad for high stress areas

17
Q

hybrid composites

A

high physical properties of macrofill and smoothness of microfill

18
Q

macrofill (conventional)

A

80% inorganic filler
large particle size
good phys properties but rough texture
not used

19
Q

microfill

A

35-60% filler
small particles
smooth surface texture, less phys properties

20
Q

important properties of composite

A
linear coefficient of thermal expansion
water sorption
wear resistance
surface texture
radiopacity
modulus of elasticity
solubility
21
Q

why must composites be radiopaque?

A

to detect radiolucent recurrent decay

done by adding Ba++ fillers

22
Q

what is wear resistance?

A

resisting abrasive contact

not as good as amalgam

23
Q

water sorption

A

amount of water material absorbs over time
absorption decreases phys properties
higher filler = less absorption

24
Q

dimensional change that occurs w/ change in temperature

A

linear coefficient of thermal expansion

25
Q

modulus of elasticity

A

stiffness of material

smaller filler = more flexibility

26
Q

solubility

A

dissolution or loss of material in oral fluid over time

**composites show none

27
Q

controversial issues with composite restorations

A

liners and bases under composites
retention in class V root surface preps
wear problems
significance in gap formation

28
Q

liners and bases under composite

A

resin modified GI and flowable for a good seal on root surface areas

traditional liners for pulp protection

29
Q

retention in class V root surface preps

A

retention grooves

30
Q

gap formation significance

A

important if restoration extends to root surface