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Restorative 2 > Resin Composites > Flashcards

Resin Composites Flashcards

1
Q

what is the resin matrix component of composite?

A

principle methacrylate monomers e.g BISGMA and a dilutent monomer e.g TEGMA

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2
Q

what is the resin matrix component of composite?

A

principle methacrylate monomers e.g BISGMA and a dilutent monomer e.g TEGMA

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3
Q

what is the filler in composite?

A

particles of silica based glass

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4
Q

other components of composite?

A

silane coupling agent

pigments

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5
Q

what is the activator in composite?

A

camphorquinone

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6
Q

classifiations of composites?

A

conventional/macro
nanofilled/micro
hybrid

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7
Q

what are high resin:filler composites like?

A
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8
Q

what are high filler:resin composites like?

A

> 60% filler/volume

stronger, more wear resistance, shrink less, more opaque less vital appearance, hard to polish

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9
Q

other type of composite?

A

hybrid

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10
Q

what is the best type of composite?

A 
nanofilled - micron sized particles
high strength
less shrinkage
high polishability
plus nano fibres to optimise resorative aesthetic abilities
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11
Q

properties of composite?

A 
non adhesive
requires bonding agent
hydrophobic
photophillic
polymerisation shrinkage
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12
Q

what component of composite causes hypersensitivity reactions?

A

HEMA

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13
Q

advantages of comopsite?

A 
wear resistance/compressive strength
matches tooth substance
command set
good aesthetics - tooth coloured
bonded to tooth =conserves tooth
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14
Q

disadvantages of composite?

A 
polymerisation shrinkage 
moisture control = essential
can be brittle
no evidence to support use with large class II cavities
depth of cure only 2mm
hard to place
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15
Q

how to overcome shrinkage?

A

hydrophobic = shrinks away from water = rubber dam
ramped output from light source
oblique increments
light tips, wedges, direct light to gingival floor

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16
Q

when to do shade match?

A

when light is off tooth

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17
Q

for anterior restorations why bevel enamel?

A

increased surface area for bonding

18
Q

how many composite shades for anterior teeth?

A

core shade = dentine

translicent shade = incisal edge

19
Q

why cure final increment under a matrix strip?

A

removes oxygen inhibited area

20
Q

make sure each increment?

A

only touches one wall of the cavity

21
Q

light cure wave length?

A

450-500nm

22
Q

rubber dam advantages?

A 
airway protection
moisture control
protects and retracts the soft tissues
good visibility for working
prevents contamination of dental materials
infection control
patient comfort
23
Q

what is the filler in composite?

A

particles of silica based glass

24
Q

other components of composite?

A

silane coupling agent

pigments

25
Q

what is the activator in composite?

A

camphorquinone

26
Q

classifiations of composites?

A

conventional/macro
nanofilled/micro
hybrid

27
Q

what are high resin:filler composites like?

A
28
Q

what are high filler:resin composites like?

A

> 60% filler/volume

stronger, more wear resistance, shrink less, more opaque less vital appearance, hard to polish

29
Q

other type of composite?

A

hybrid

30
Q

what is the best type of composite?

A 
nanofilled - micron sized particles
high strength
less shrinkage
high polishability
plus nano fibres to optimise resorative aesthetic abilities
31
Q

properties of composite?

A 
non adhesive
requires bonding agent
hydrophobic
photophillic
polymerisation shrinkage
32
Q

what component of composite causes hypersensitivity reactions?

A

HEMA

33
Q

advantages of comopsite?

A 
wear resistance/compressive strength
matches tooth substance
command set
good aesthetics - tooth coloured
bonded to tooth =conserves tooth
34
Q

disadvantages of composite?

A 
polymerisation shrinkage 
moisture control = essential
can be brittle
no evidence to support use with large class II cavities
depth of cure only 2mm
hard to place
35
Q

how to overcome shrinkage?

A

hydrophobic = shrinks away from water = rubber dam
ramped output from light source
oblique increments
light tips, wedges, direct light to gingival floor

36
Q

when to do shade match?

A

when light is off tooth

37
Q

for anterior restorations why bevel enamel?

A

increased surface area for bonding

38
Q

how many composite shades for anterior teeth?

A

core shade = dentine

translicent shade = incisal edge

39
Q

why cure final increment under a matrix strip?

A

removes oxygen inhibited area

40
Q

make sure each increment?

A

only touches one wall of the cavity

41
Q

light cure wave length?

A

450-500nm

42
Q

rubber dam advantages?

A 
airway protection
moisture control
protects and retracts the soft tissues
good visibility for working
prevents contamination of dental materials
infection control
patient comfort

Restorative 2 (15 decks)

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