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Fixed Midterm Spring > 8. ACC III > Flashcards

8. ACC III Flashcards

1
Q

What factors influence the color of the final restoration

A
  • Stump (ND) shade
  • Restoration thickness
  • Shade and translucency of ceramic
  • Cement shade
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2
Q

When selecting the shade errors in selecting the correct (hue/chroma/value) are the most noticeable

A

value

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3
Q

If you have a few discolored tooth background what are your options

A

layered emax (opaque layer coping with more translucent layers (ceramic veneering) to give more lifelike restoration)

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4
Q

What are the different levels of emax translucency

A
  • Mutli
  • High translucency
  • Medium translucency
  • Low translucency
  • Medium opacity
  • High opacity
  • Impulse
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5
Q

Is it important to know if the emax crown will be layered or not

A

yes because if it is layered you need more than 1mm facial reduction

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6
Q

How much facial reduction is needed for layered emax

A

1.3 mm

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7
Q

What factors need to be considered when determining if the restoration should be layered

A
  • Stump shade

- Final desired shade

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8
Q

Outcome of the final restoration shade is more predictable with a (light/dark) stump shade

A

light

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9
Q

The opaque coping layer is how thick

A

0.7-0.8mm

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10
Q

Which bonds better to layering ceramic E.max of Zirconia opaque copings

A

E.max

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11
Q

T/F Major color corrections can be achieved with veneers

A

F-can’t

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12
Q

Most commonly used materials for veneers

A
  • Empress

- Emax CAD and press

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13
Q

What restoration is indicated for anterior teeth requiring major color correction

A

full coverage

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14
Q

What is a more conservative adjunct to veneers to help whiten the teeth

A

bleaching

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15
Q

The effect of the cement shade on the final shade of the restoration is small because it is _ nm thick

A

70 microns

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16
Q

Another word for try in paste for a resin esthetic cement is

A

optical connector

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17
Q

Resin cements for veneers are (light/self/dual) cure

A

Light and dual cure

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18
Q

The more transparent the cement the (lighter/darker) the appearance of the restoration

A

darker (more of the stump shade will show)

19
Q

The try in paste corresponds to the shade of the (polymerized/unpolymerized) cement

A

polymerized

20
Q

Look at the chart on slide 28

A

ok

21
Q

What restorative material is the gold standard in patients with parafunction and why

A

gold because it is strong and non-abbrasive to the opposing dentition

22
Q

What is the only all-ceramic restoration indicated for bruxers

A

zirconia

23
Q

What are the most common complications (in order of most to least common) of single crowns

A
  • Need for endo
  • Porcelain fracture
  • Loss of retention
  • Perio disease
  • Caries
24
Q

What are the most common complications (in order of most to least common) of all ceramic single crowns

A
  • Facture (less of an issue today with the ceramic materials- this was more for feldspathic)
  • Loss of retention
  • Pulpal health
  • Caries
  • Perio disease
25
Q

15 year survival rate of empress restorations

A

75%

26
Q

15 year survival rate of leucite reinforced ACC

A

69-74%

27
Q

T/F The 15 year survival rate of leucite reinforced ACC is similar to PFM

A

t

28
Q

Main reason for failure of Leucite restorations

A
  • Loss of retention** (result of bonding)
  • Fracture
  • Discoloration
  • Sensitivity
29
Q

What are the three significant predictors for failure of restorations

A
  • Gender
  • Parafunctional habits
  • Non-vitality of the tooth
30
Q

Which gender has more restoration failures and what are the causes of the failures

A

-Males with higher loss of retention and caries

31
Q

Non-vital teeth often contribute to restoration failure by…

A

increasing the probability for bond failure

32
Q

Before re-luting a ACC that debonded what should be done

A

diagnose the cause for the debonding

33
Q

Higher success rates in ACC reztorations may be made by improving the quality of what

A

the cemented interface

34
Q

Two most common reasons for fracture of ACC restorations are

A
  • Prep guidelines weren’t followed

- Parafunctional habits

35
Q

Discoloration may be caused by

A

mixing ferric sulfate and aluminum chloride

36
Q

Contamination of ferric sulfate may lead to staining and

A

reduce the bond strength –> microleakage

37
Q

The restoration should be cemented (before/after) the occlusal adjustements have been made and the restoration is polished

A

after

38
Q

T/F the crown can be adjusted and polished intraorally

A

t

39
Q

Centric contact on an anterior tooth with an ACC should be where

A

where the porcelain is supported by tooth structure (i.e in the middle third of the lingual wall)

40
Q

Is leaving the opposing tooth out of occlusion a good idea? Why or why not?

A

no because it will lead to supra-eruption, protrusive interference , and precipitating fracture.

41
Q

Why can’t veneers do significant color correction

A

because they are thin and translucent

42
Q

Why don’t you want to use an opaque veneer

A

won’t look natural (chiclet white smile)

43
Q

How much space is needed for a layered ACC

A

1.3-1.5mm

44
Q

Try in pastes must be used for (translucent/opaque) restorations

A

translucent

Fixed Midterm Spring (9 decks)

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