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xD3 Endo Final > Restoring Endo Treated Teeth (Archer / imbrey) > Flashcards

Restoring Endo Treated Teeth (Archer / imbrey) Flashcards

1
Q

Which teeth had a higher success rate: teeth with a good restoration and poor endo or teeth with a poor restoration and good endo?

A

Good restoration and poor endo

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2
Q

What is ideal for getting a good seal over endo treatment prior to the definitive restoration?

A

Adequate temporary restoration of access opening and bonded seal over gutta percha

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3
Q

What are 3 orifice sealers?

A
  1. MTA
  2. Glass ionomer
  3. Flowable resin (purple permaflow resin(
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4
Q

What temporary restoration does Grad endo use?

A

Triage glass ionomer

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5
Q

What are the components of a long tooth seal from apex to crown in order?

A
  1. Calcium hydroxide
  2. MTA
  3. Gutta percha
  4. Glass ionomer
  5. Composite resin
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6
Q

When is root canal therapy complete?

A

When the tooth is properly restored

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7
Q

What is the first question to ask before restoring an endodontically treated tooth?

A

Is it restorable?

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8
Q

Once the tooth is confirmed as restorable, what should you make sure concerning the endo treatment?

A
  1. Sufficient apical seal
  2. Asymptomatic
  3. Radiolucency decreasing in size
  4. Absence of fistula if one was present before
  5. Provisional restoration still in place
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9
Q

What is an inadequate restoration with respect to Endodontics?

A
  1. One that does not give adequate apical seal for the endo

2. One that does not give a seal and full cuspal coverage on premolars and molars for restorative

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10
Q

Is it true that the dentin of endodontically treated teeth is weaker than vital teeth?

A

No

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11
Q

What is the result of the access and tooth preparation associated with an NSRCT treated tooth?

A

Tooth has increased cuspal flexure and increased fracture risk

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12
Q

What improves the prognosis of NSRCT teeth?

A

Restorations that enhance a tooth’s structural integrity

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13
Q

In the Ray and Trope study, what was shown to have significantly more presence of periradicular pathology after endo and restorative treatment: poor restorations or poor endo?

A

Poor restorations

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14
Q

What restoration is indicated for conservative access on anterior tooth?

A

Composite

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15
Q

What are 2 considerations when deciding the restoration for an endodontically treated anterior tooth?

A
  1. Structural integrity

2. Functional requirement

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16
Q

What is a consideration if it is determined an anterior tooth endodontically treated will need a crown?

A

Does it require a post and core

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17
Q

The presence of what is the only significant variable to predict long-term success in endodontically treated posterior teeth?

A

Presence of cuspal coverage restoration

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18
Q

If you must do an access through a gold crown, what must be done to restore it?

A

SMBP 5 step amalgam bonding with Valiant PhD amalgam

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19
Q

When restoring an access through a PFM crown, how many different substrates exist and how many will you bond to?

A

3 substrates exist (porcelain, metal alloy, dentin)

You will bone to 2 (porcelain and dentin)

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20
Q

What is used to bond to porcelain?

A

HF etch, Silane coupler, Optibond Solo Plus

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21
Q

What is used to bond to dentin?

A

Phosphoric acid etch, optioned solo plus, rein

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22
Q

Whar are some methods to increase retention and resistance of restorations od endodontically treated teeth?

A
  1. TMS pins
  2. Amalgapins
  3. Amalgam bonding
  4. Condense into pulp chamber
  5. Condense into root canal
  6. Posts
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23
Q

What must be considered with respect to the final restorations when placing pins for retention?

A

If they will be within the bounds of the final restoration

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24
Q

How much pulp chamber height is sufficient for retention?

A

4mm

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25
Q

If there is less than 4mm of pulp chamber height, what can be used to aide retention?

A

Canals

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26
Q

What is the purpose of a post?

A

Retain the core

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27
Q

What are 2 general classes of posts?

A
  1. Prefabricated

2. Custom

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28
Q

Prefabricated posts can be what design?

A
  1. Active (look like screws)
  2. Passive (held in with cement)
  3. Parallel
  4. Tapered
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29
Q

Custom cast posts can be made how?

A

Directly or indirectly, either parallel or tapered

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30
Q

What are 5 material prefab posts can be made from?

A
  1. Stainless steel
  2. Nickel chromium alloy
  3. Titanium alloy
  4. Carbon fiber
  5. Zirconium or ceramic
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31
Q

What is a disadvantage of titanium alloy prefabricated post?

A
  1. Radiopacity the same as gutta percha

2. Weaker and tend to break during retreatment

32
Q

What is the main advantage of a carbon fiber prefab post?

A

Modulus of elasticity equal to dentin

33
Q

What does zirconium or ceramic prefab post offer?

A

Maximum esthetics

34
Q

What is the disadvantage of the zirconium prefab post?

A

It cannot be etched

35
Q

What is the only time an active post is indicated?

A

With short roots when maximum retention is required

36
Q

Does increasing the diameter of a post increase its retention?

A

No, teeth with thicker posts fracture more easily

37
Q

What diameter should a post be?

A

Do not exceed 1/3 cross sectional diameter of the root

38
Q

What is a danger when planning or placing a post?

A

Unseen root concavities

39
Q

How large should a canal be opened when prepping for a post?

A

Only enough to allow a post to fit accurately and passively

40
Q

Does cement have a large effect on the post?

A

No

41
Q

How long should a post be?

A

As long as possible while leaving 4-5mm of gutta percha at the apex

42
Q

What limits post length other than the requirement for 4-5 mm gutta percha at the apex?

A

Individual tooth anatomy. Can only go where the canal is straight

43
Q

Post length should at least be equal to what?

A

Height of clinical crown

44
Q

Post length should be at least how long?

A

At least 8mm

45
Q

What is a landmark that the post must extend apically beyond?

A

Beyond the crest of bone

46
Q

What amount of gutta percha must be left at the apex for a post?

A

4-5mm gutta percha

47
Q

Are posts commonly required in molars?

A

No just rarely

48
Q

What canal would a post be placed in molars?

A
  1. Straight
  2. Mandibular molar distal canal
  3. Maxillary molar palatal canal
49
Q

Is the parapets plus system passive or active?

A

Passive

50
Q

What is the design of the ParaPost Plus prefab post?

A

Parallel serrated

51
Q

The ParaPost Plus prefab post comes in what 2 materials?

A

Titanium and stainless steel (VCU has stainless steel)

52
Q

The ParaPost Plus prefab post is cemented with what?

A

Fujicem

53
Q

What core material will a ParaPost Plus prefab post retain?

A
  1. Amalgam

2. Composite

54
Q

What are 4 types of composite core materials?

A
  1. Z250
  2. CompCore
  3. FluoroCore
  4. TiCore
55
Q

What are 3 different instruments that can be used to remove gutta percha to make space for a post?

A
  1. Parapost drill
  2. Gates Glidden
  3. Warm Plugger
56
Q

The brown ParaPost drill is what diameter?

A

0.9mm

57
Q

The yellow ParaPost drill is what diameter?

A

1.0mm

58
Q

The blue ParaPost drill is what diameter?

A

1.14 mm

59
Q

The red ParaPost drill is what diameter?

A

1.25mm

60
Q

The violet ParaPost drill is what diameter?

A

1.40mm

61
Q

The black ParaPost drill is what diameter?

A

1.50mm

62
Q

The green ParaPost drill is what diameter?

A

1.75mm

63
Q

A #1 Gates Glidden is equal to what file size?

A

50

64
Q

A #2 Gates Glidden is equal to what file size?

A

70

65
Q

A #3 Gates Glidden is equal to what file size?

A

90

66
Q

A #4 Gates Glidden is equal to what file size?

A

110

67
Q

What are 4 disadvantages of post retention?

A
  1. Risk of perforation
  2. Increased chance of root fracture
  3. Increased of endodontic failure
  4. Strip perforation
68
Q

Duralay is used making what custom post and core: direct or indirect?

A

Direct

69
Q

An impression of a prepared post space is used to make what custom post and core: direct or indirect?

A

Indirect

70
Q

How many appointments does a custom post and core take to make the most custom fit?

A

2 appointments

71
Q

To what treatment is one committed with a custom post and core?

A

Crown

72
Q

What should be placed in the cervical portion of a custom post and core preparation?

A

Anti-rotational grooves

73
Q

What is a ring or cap usually of metal put around a slender shaft (as a cane or a tool handle) to strengthen it or prevent splitting?

A

Ferrule

74
Q

What is the required Ferrule (minimum amount of natural tooth structure from the mating cervically) for a crown restoration?

A

2mm

75
Q

Short posts are more likely to result in what?

A

Crown fracture

xD3 Endo Final (8 decks)

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