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Dental Materials > Final > Flashcards

Final Flashcards

1
Q

What will inhibit free radical oxidation

A

Oxygen

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2
Q

4 major components of composite

A
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3
Q
A

Oligomer component is BISGNA

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4
Q

Fillers are very important

A
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5
Q

More filler =

A

Stronger and more abrasion resistant

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6
Q

Filler size. Larger particles=

A

Rougher surface

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7
Q

What degrades the bond of composite

A

When water is absorbed intraorally

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8
Q

Oxygen is

A

An air inhabited layer

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9
Q

What’s the primary cause if you add composite and it falls off

A

You more than likely polished it

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10
Q

Galvanic shock

A
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11
Q

Why does galvanism cause a shock

A

Two diff metals

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12
Q

Adding composite as often as you can in 2mm increments why?

A

Minimize amount of shrinkage

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13
Q

For bond to flow into Micro mechanical retention what is needed

A

Low contact angle

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14
Q

Depth of cure and ways you can influence it

A
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15
Q

Why is barium added to composite

A

It’s radio opaque not radiolucent

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16
Q

When you put the light on the composite where should it be

A

As close to the composite as you can get without touching it at flat angle

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17
Q

Biocompatablity

A
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18
Q

Chemical/dual cure has

A

Shrinkage

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19
Q

Composite is held in place by

A

The micro mechanical retention from the tubules

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20
Q

Polymerization reaction is what kind of reaction

A

Free radical ?

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21
Q

When you are choosing a. Composite resin what factor will have the greatest impact on its characteristics

A

Fillers

22
Q

How much overlap for cerac scanner

A

1/3

23
Q

What’s the difference between PVS impressions and cerec

A

Cerec is positive PVS and agitate it negative impression

24
Q

Bluecam and Omnicam

A

Both need isolation

25
Q

Why do you use a powder with digital

A

Reduce shine of metals

26
Q

Is it difficult to store digital scans

A

No

27
Q

Characteristics of waxes

A
28
Q

Are waxes good thermal conductors

A

No but the have a large coefficient of expansion

29
Q

All waxes have a ______________

A

Specific melting RANGE

30
Q

When you’re using a wax that has a tendency to return to its original shape it is ___________

A

Elastic memory

31
Q

What do you use for a final impression

A

Elastomeric material PVS

32
Q

What elastomeric impression material may form hydrogen gas

A
33
Q

Monomer and polymer which is which

A

Monomer is liquid polymer is powder

34
Q

What in benzoyl peroxide

A
35
Q

Which chemical is added to the light activated resin as photoinitiator

A

Campoq

36
Q

When bonding cement to calcium of hydroxy appetite and dentin what kind of bond is it

A

Chemical

37
Q

Waht causes surface tension in liquids

A
38
Q

Amorphous and crystalline

A
39
Q

Is it a good idea to subject materials to plastic strength

A

No

40
Q

Cathodic

A
41
Q

Anodic

A
42
Q

Stress strain diagram

A
43
Q

Force deformation diagram

A
44
Q

Waht causes precipitation hardening

A

Type III metal from clenching or RAPID COOLING

45
Q

To excise tissue under a healing cap how would you do it

A

A laser to prevent bleeding for impression

46
Q

When you mix an amalgam what is happening

A

Amalgamation

47
Q

What part of mercury is the most dangerous

A

When it is being grounded out of a restoration and vapor element is created

48
Q

Dual cure

A
49
Q

Composite procedure

A
50
Q

Chart on composites restoring facial on #9, what composite would be best for it

A

Micro fill—nano particle ?

51
Q

Provisional composite use for

A

Temp crown

52
Q

How can you control the depth of cure of your light

A

Distance the light is from restoration. Amount of time cured. Intensity of light.

Dental Materials (5 decks)

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