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D2: Clinical Skills 4 > 01 Post and Core > Flashcards

01 Post and Core Flashcards

1
Q

When is RCT officially complete

A

When the tooth is properly restored

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2
Q

5 Keys to Successful endo therapy

A
  1. Sufficient apical seal
  2. Coronal seal
  3. Asymptomatic
  4. Absence of periapical pathology
  5. Absence of initial fistula
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3
Q

Ray and Trope Determined that which was more important to long term endo treatment quality, the RCT or the permanent restoration

A

Restoration

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4
Q

Is there any evidence that supports the notion that RCT dentin is weaker than vital dentin

A

no

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5
Q

What can improve the prognosis of endodontically treated teeth

A

Restorations that enhance structural integrity

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6
Q

As a general rule, what can anterior teeth be restored with following RCT

A

Composite, as long as there are no interproximal lesions or restorations

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7
Q

What are the functional requirements of a structurally compromised incisor and cuspid

A

Post and Core

Crown

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8
Q

What will premolars require after RCT than anterior teeth do not

A

Cuspal coverage

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9
Q

What was the only significant variable to predict long term success of posterior RCT teeth?

A

Cuspal coverage

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10
Q

In reality, how many posterior teeth were restored with cuspal coverage after RCT?

A

50%

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11
Q

How deep does the pulp chamber need to be to provide adequate retention

A

4 mm

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12
Q

What if the pulp chamber is less than 4 mm

A

remove 2-3mm of gutta percha from the canals

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13
Q

Are posts commonly needed

A

no

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14
Q

What are sources of retention for posterior RCT teeth

A

Pulp Chamber
Canals
Amalgapins
Bonding

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15
Q

What is the purpose of a post

A

To retain the core

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16
Q

What is the decision to place a post predicated on?

A

The amount of remaining coronal tooth structure after the crown placement

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17
Q

What is the indication for posts

A

If there is any question whether or not a post is needed, it is recommended to place one!

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18
Q

What is the general rule regarding post indications

A

All anterior and premolar teeth requiring a crown having an endo access and an interproximal lesion or restoration shold be considered to be restored with post and core and crown

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19
Q

What are the two Prefabricated post materials highlighted by dr. Imbery

A

Stainless steel

Carbon fiber

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20
Q

What is the advantage of fiber-reinforced resin based composite posts

A

The modulus of elasticity is closest to dentin

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21
Q

What are the possible core materials

A 
Amalgam
Composite
  Light Cured
    Z250
  Dual Cured
    CompCore
    TiCore
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22
Q

What are the prefabricated post systems at VCU

A

ParaPost XP

Fiber Lux

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23
Q

What are the Cusom Post options at VCU

A

Cast Type III Gold or Option Alloy

Direct or Indirect

24
Q

What is ParaPost XP

A

Stainless Steel, Parallel

25
Q

What is Fiber Lux

A

Carbon Fiber, Parallel

26
Q

Where is ParaPost XP not recommended

A

In non-circular canals

27
Q

What type of cement is used with ParaPost Xp

A

FujiCem II

28
Q

What do you place of the post of ParaPost Fiber Lux

A

Silane

29
Q

What cement is used with Fiber Lux

A

Nexus 3

30
Q

What are the advantages of a custom post

A

Custom fit

Core attached to the post

31
Q

What are the disadvantages of a custom post

A

2 appointments

32
Q

What instruments are recommended for Gutta Percha Removal

A

Gates Glidden

33
Q

What determines whether to use a pre-fab or custom post?

A

Canal shape

34
Q

Do teeth with thicker, or thinner posts fracture more easily?

A

Thicker

35
Q

Which posts lead to more root fractures, tapered or parallel?

A

Tapered

36
Q

Does an increased post diameter equal increased retention?

A

No

37
Q

What should you always be on the lookout for

A

Unusual root morphology and dilacerations

38
Q

What should you not exceed

A

1/3 cross-section diameter of the root

39
Q

How long should the post be?

A

Equal to the height of the clinical crown

At least 8mm if possible

Extend apically beyond the crest of bone

Leave 4-5 mm of gutta percha

Limited by anatomical variations

40
Q

By how much should you enlarge the canal?

A

Only enough to allow a post to fit accurately and passsively

41
Q

Does the type of cement used have a big impact on retention

A

No

42
Q

What should the stopper be set at when removing gutta percha from a tooth 19 mm long?

A

19-5 = 14 mm

43
Q

What is a prime factor in the fracture resistance of the root

A

Thickness of remaning dentin

44
Q

Why is the gates glidden drill recommended over the parapost drill?

A

It conformed to the original canal more consistently that the PP drill

45
Q

When are PP drills useful

A

For shaping the canal after the GP is removed

46
Q

Which canal should the post be placed in?

A

The straightest

47
Q

Which canal is used for mandibular molars?

A

Distal

48
Q

Which canal is used for Mx Molars

A

Palatal

49
Q

Which way does the palatal canal curve usually

A

facially

50
Q

What should you always use when placing post and cores

A

Rubber dam

51
Q

Which canal is preferred in premolars for the Fiber Lux

A

Palatal

52
Q

What is duralay?

A

Chemically cured methacrylate resin

53
Q

What size post should you use when waxing up your custom cast post

A

Plastic post corresponding to the size of the last parapost drill

54
Q

For an indirect custom core, what must be placed in the pulp chamber is the chamber is oval or circular

A

An anti-rotational groove

55
Q

What size ferrule is needed for an indirect custom post and core

A

2 mm circumferential

56
Q

What should be remembered about the posts

A

Used to retain a core

Preserve periradicular dentin
Use postos of adequate length and diameter
Use posts that are retrievable

D2: Clinical Skills 4 (5 decks)

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