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Clinical skills year 3 > Adhesion > Flashcards

Adhesion Flashcards

1
Q

What does acid-etch do

A

Removes smear layer

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2
Q

What happens to the collagen after placing bond

A

collagen network becomes more active

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3
Q

GIC has been used to ……. ……. process

A

control caries

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4
Q

Biodentine is a massive outflow of …..

A

calcium hydroxide

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5
Q

Pulpal actions of calcium hydroxide

A

increases mineralization

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6
Q

Polymers is a large molecule repeated of structural units connected by covalent chemical bonds, they are used in dentistry for….

A
  • composites
  • acrylic dentures
  • alginate
  • silicone impression (putty)
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7
Q

2 main methods for synthesising polymers

A
  1. Addition
  2. Condensation
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8
Q

We conduct ……… when we use a ……. to ……… dental composite

A

polymerisation
light
cure

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9
Q

Addition of polymerisation is the joining of ….. …….. to form a …….. larger molecule

A

two molecules
third

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10
Q

3 steps of Addition polymerisation

A
  1. Initiation
  2. Propagation
  3. Termination
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11
Q

Incremental curing is composite is required due to….

A
  • the limited cure depth
  • reduce shrinkage stress
  • “the depth of cure”
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12
Q

Combination of …… and …… is used to improve the degree of polymerisation

A

heat
light

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13
Q

Condensation polymerisation is the reaction between …. …….. and then a small ……… is ………..

A

two molecules
molecule
eliminated

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14
Q

Why are composites so widely used?
List 4

A
  • withstand the environment in the oral cavtiy
  • easily shaped to anatomy of tooth
  • match tooth colour
  • bond directly to tooth tissue
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15
Q

3 Contraindications of composite

A
  • poor isolation
  • larger posterior restorations
  • bruxism
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16
Q

2 Major constituents for composite

A
  • high molecular weight monomers
  • fillers
17
Q

What reduces viscosity in resin monomer

A

diluent monomers (minor component)

18
Q

Inhibitors are a minor component in resin monomers which are added to prevent ……… ………. during storage, handling and placement

A

premature polymerisation

19
Q

What particles are seen to improve the properties of composite

A

smaller particles

20
Q

The higher the filler content the …….. the polymerisation ………..

A

lower
shrinkage

21
Q

Filler particles are important in composite because they……
list 4

A
  • reduce polymerisation shrinkage
  • improves surface hardness
  • improves mechanical properties (elasticity, strength)
  • improves aesthetics
22
Q

Silane coupling agents …….. the adhesion between the …… and the ……… matrix

A

enhances
filler
polymer

23
Q

Polymerisation shrinkage plays a significant role in restoration failure which can lead to …. 4 things

A
  1. gap formation
  2. secondary caries formation
  3. marginal leakage
  4. post-operative sensitivity
24
Q

The maximum thickness of a layer of composite that can be cured is the measure of ………. … ……….

A

“depth of cure”

25
Q

On curing a limited thickness of composite undergoes ………… so composites have a limited …… ……… …….

A

polymerisation
depth of cure

26
Q

3 types of composites

A
  1. Nanocomposites
  2. Flowable composites
  3. Bulk filled composites
27
Q

4 Properties of Nanocomposites

A
  1. nano sized particles (very small)
  2. low polymerisation shrinkage
  3. good aesthetics
  4. high flexural strength
28
Q

Nanocomposites have a very smooth surface which makes them have a high polish retention which makes them good for (5)

A
  • long lasting aesthetics
  • reduced plaque adhesion
  • reduced risk of secondary caries
  • reduced risk of gingival inflammation on class V
  • high oral comfort
29
Q

Flowable composites gives rises to ….. …….. ……..

A

high contraction stresses

30
Q

Flowable composites have a reduced amount of …… ……. making them a lot more …….. but with a higher shrinkage rate

A

filler content
flexible

31
Q

Flowable composites are now recommended to only us as 3 things

A

liners
fissure sealants
small restorations

32
Q

What does pre-warming composite do

A

Enhances flow of composite as viscosity decreases , better for placement

33
Q

What are bulk-filled composites

A
  • composites that do not require incremental curing
  • can cured up to depths of 4-5mm

Clinical skills year 3 (5 decks)

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