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Operative Dentistry > Quiz 4-Class II composites, Class III (composites) > Flashcards

Quiz 4-Class II composites, Class III (composites) Flashcards

1
Q

Which component of the composite has the high polymerization shrinkage??

A

the RESIN (not the filler)—aka Bis GMA

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2
Q

Which component of the composite is easiest to wear? (aka-lowest wear resistance)

A

the RESIN (not the filler)—aka Bis GMA

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3
Q

Which component of the composite soaks in water?

A

the RESIN (not the filler)—aka Bis GMA

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4
Q

The filler in composite has a Mohs (haha Moh’s) hardness factor of ___ which is comparable to steel, but that makes it relatively _______. But the properties of the composite all depends on ______ of the filler.

A

7….BRITTLE…size

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5
Q

Understanding composite: it bonds best to ____ & _____ enamel.

A

cut & etched

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6
Q

Understanding composite: it has high _________ SHRINKAGE

A

polymerization

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7
Q

Understanding composite: has limited occlusial ________

A

wear resistance

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8
Q

Understanding composite: requires a relatively _____ field for predicable adhesions.

A

dry

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9
Q

We don’t recommend placing composite directly on _____ in a deep class II, instead we would use a ________ technique with _______.

A

dentin…sandwich….glass ionomer

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10
Q

We always want to place composite in small, less than ____mm increments.

A

2mm

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11
Q

The outline form is ALWAYS determined by _______!

A

DECAY

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12
Q

The _______ are larger then amalgam (for aesthetics and matrix band)

A

proximal extensions

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13
Q

Avoid placing the cavo-surface in ______ areas, so you can pre-________.

A

contact….pre-articulate

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14
Q

TRY to keep the gingival floor in _______.

A

enamel

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15
Q

While there SHOULD be no undermined enamel, a ‘_______’ amount is permissible with composite.

A

‘minimal’

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16
Q

The _______ of a class II compostie does not need an additional bevel.

A

cavo-surface

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17
Q

Bevels are placed in the ______ on the cavo-surface in ENAMEL only!

A

box form

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18
Q

Bevels are ____ degrees and ____-____mm

A

45 degrees…. 0.5-1.0mm

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19
Q

Even though there is no science, we want the occlusal part of the prep to be ____mm where contacts are involved.

A

1.5mm

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20
Q

Do we put retention points in traditional class II composite preps? DO we bevel the gingival margin?

A

nope, only if its still in enamel (which will be rare)

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21
Q

If we have a deep box, what is the minimal axial depth?

A

1mm

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22
Q

DO we place retention grooves on composite slot preps? Do we bevel?

A

yes…yes

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23
Q

How much proximal separation do we have for composite preps?

A

0.5-1.0mm

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24
Q

What are the three composites we can use in the box form?

A

flowable (margins), glass ionomer (resin modified), and micro-hybrid composites

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25
Q

What are the three composites we can use in the box form?

A

flowable (margins), glass ionomer (resin modified), and micro-hybrid composites

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26
Q

What are the 3 composites we can use in the occlusal surface of our traditional class II?

A

microhybrid, nano-composite, highly filled composites

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27
Q

What are the 3 composites we can use in the occlusal surface of our traditional class II?

A

microhybrid, nano-composite, highly filled composites

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28
Q

What are the three components to our specially coated composite instruments?

A

Nickel, Aluminum, and Nitride

29
Q

What are the three components to our specially coated composite instruments?

A

Nickel, Aluminum, and Nitride

30
Q

What type of wedge do we use for class II composites?

A

plastic wedges!

31
Q

Remove this thing (if you chose to use it) BEFORE placing bevels.

A

pre-restorative wedge

32
Q

What is the order of bevel placing in the box form? The bur cuts from ______ the box form.

A

1.gingival 2.facial 3.lingual….inside

33
Q

Which composite type has high polish ability, good transparency, but is brittle and has poor fracture strength? Where do we generally put these?

A

MicroFilled composite….final layer of anterior restorations

34
Q

What is the most common composite used? It has good overall strength, is the most versatile, but has fair internal polish and the silica can be plucked out…

A

Hybrid composites

35
Q

Which is the NEWEST composite (a Dr. H favorite), has high polish ability, good wear resistance, low shrinkage, but has high cost and questionable overall internal strength?

A

Nano-composites

36
Q

Which matrix system tends go yield LIGHT contacts?

A

tofflemire band matrix

37
Q

What type of matrix system is the GO TO for composites?

A

the sectional matrix yo!

38
Q

What do we burnish the metal matrix band with?

A

double ended plastic instrument

39
Q

Why do we use plastic wedges?

A

they “WRAP” around the matrix band!

40
Q

For WIDE embrasures, place the ring on the _______ side of the wedge from the prep.

A

OPPOSITE

41
Q

For MOD’s you can use 2 G Rings!!! Place the long ring _____ the standard ring.

A

OVER

42
Q

Why do we keep GI away from the cave surface?

A

it has poor wear resistance and will cause leakage!!

43
Q

We are going to etch for a total of _____ seconds, and rinse for a total of _____ seconds.

A

20…20

44
Q

The bond we use in sim clinic is _____ generation, which is _______ + ______.

A

5th generation….primer + bond

45
Q

IF you decide to add CHX, when do you apply it?

A

Post-etch and pre-bond

46
Q

Which post-etch, pre-bond treatment can cause ‘water’ trees and possibly inhibit penetration of bonding resin?

A

cavity cleanser

47
Q

What is the post etch, pre bond desensitizer we like to use? (2 names)

A

GLUMA or HEMA

48
Q

Where does our main dentin retention come from?

A

INTERTUBULAR DENTIN!

49
Q

When dentin is dried, the collagen fibrils ______.

A

collapse

50
Q

The HYBRID layer is between the _______ and the ______.

A

BONDING resin and DENTIN

51
Q

Bond- the _____ use containers are the best and scrub the applicator for ___ seconds.

A

single use….15 seconds

52
Q

_______ blow away OR suction volatiles from a distance and then move closer.

A

GENTLY

53
Q

Light cure your bond for ____ seconds…What do we do if it was contaminated with saliva?

A

20 seconds..re-etch etc…

54
Q

TO SEAL the gingival margin we will use ______ composite and our ________ instrument.

A

flowable…explorer

55
Q

The flowable layer on the gingival margin is very ______ and it is cured for ___ seconds.

A

thin…20 seconds

56
Q

IT IS important to place composite sequentially because polymerization shrinkage can cause tension on the _____.

A

cusps

57
Q

When placing composite in the box, Dr. H likes the ‘______’ profile design and to use the _______ instrument…Its all good to switch to this bad boy for the occlusal surface.

A

‘U-profie’….XTS Mini #1….XTS Mini #3

58
Q

Final light cure for _____ seconds.

A

60

59
Q

When do we check occlusion? (2 distinct times)

A

After pre-finishing(before polishing) then After GLAZING

60
Q

DO we use water with the pre-finishing burs?

A

YES

61
Q

How many microns for the Red-Fine pre-finishing burs? How many microns for the yellow-extra fine pre-finishing burs?

A

30microns for red…..15 microns for yellow

62
Q

What are the three types of pre-finishing burs we use?

A

379, 135, and 247

63
Q

What can we use for gingival margin flash?

A

14 de meo carver

64
Q

What are the 4 polishing steps?

A

1.fine soft disc (wet, slow) 2.rinse and DRY 3.super-fine disc (dry, fast) 4.jiffy brush (dry, fast)

65
Q

If you are going to use a rubber impregnated polisher make sure to use ______!

A

LUBRICANT!! (KY or H2O)

66
Q

When using the ICDAS codes, what level do we do a MIR? What % has it progressed?

A

classes 4-6…88% of dentin

67
Q

IF IN THE OUTER 1/2 of DENTIN, ____% are likely caveated!!!! If in the inner half of dentin (____%)

A

40.9 %….(100%)

68
Q

Direct pulp caps are used for a _____ exposure of less than ___mm. A thin layer of _____ is placed over the exposure.

A

small…1mm…CaOH

Operative Dentistry (25 decks)

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