01 Post and Core

Question 1

When is RCT officially complete

Answer 1

When the tooth is properly restored

Question 2

5 Keys to Successful endo therapy

Answer 2

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

Question 3

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

Answer 3

Restoration

Question 4

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

Answer 4

no

Question 5

What can improve the prognosis of endodontically treated teeth

Answer 5

Restorations that enhance structural integrity

Question 6

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

Answer 6

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

Question 7

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

Answer 7

Post and Core

Crown

Question 8

What will premolars require after RCT than anterior teeth do not

Answer 8

Cuspal coverage

Question 9

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

Answer 9

Cuspal coverage

Question 10

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

Answer 10

50%

Question 11

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

Answer 11

4 mm

Question 12

What if the pulp chamber is less than 4 mm

Answer 12

remove 2-3mm of gutta percha from the canals

Question 13

Are posts commonly needed

Answer 13

no

Question 14

What are sources of retention for posterior RCT teeth

Answer 14

Pulp Chamber
Canals
Amalgapins
Bonding

Question 15

What is the purpose of a post

Answer 15

To retain the core

Question 16

What is the decision to place a post predicated on?

Answer 16

The amount of remaining coronal tooth structure after the crown placement

Question 17

What is the indication for posts

Answer 17

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

Question 18

What is the general rule regarding post indications

Answer 18

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

Question 19

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

Answer 19

Stainless steel

Carbon fiber

Question 20

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

Answer 20

The modulus of elasticity is closest to dentin

Question 21

What are the possible core materials

Answer 21

Amalgam
Composite
  Light Cured
    Z250
  Dual Cured
    CompCore
    TiCore

Question 22

What are the prefabricated post systems at VCU

Answer 22

ParaPost XP

Fiber Lux

Question 23

What are the Cusom Post options at VCU

Answer 23

Cast Type III Gold or Option Alloy

Direct or Indirect

Question 24

What is ParaPost XP

Answer 24

Stainless Steel, Parallel

Question 25

What is Fiber Lux

Answer 25

Carbon Fiber, Parallel

Question 26

Where is ParaPost XP not recommended

Answer 26

In non-circular canals

Question 27

What type of cement is used with ParaPost Xp

Answer 27

FujiCem II

Question 28

What do you place of the post of ParaPost Fiber Lux

Answer 28

Silane

Question 29

What cement is used with Fiber Lux

Answer 29

Nexus 3

Question 30

What are the advantages of a custom post

Answer 30

Custom fit | Core attached to the post

Question 31

What are the disadvantages of a custom post

Answer 31

2 appointments

Question 32

What instruments are recommended for Gutta Percha Removal

Answer 32

Gates Glidden

Question 33

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

Answer 33

Canal shape

Question 34

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

Answer 34

Thicker

Question 35

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

Answer 35

Tapered

Question 36

Does an increased post diameter equal increased retention?

Answer 36

No

Question 37

What should you always be on the lookout for

Answer 37

Unusual root morphology and dilacerations

Question 38

What should you not exceed

Answer 38

1/3 cross-section diameter of the root

Question 39

How long should the post be?

Answer 39

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

Question 40

By how much should you enlarge the canal?

Answer 40

Only enough to allow a post to fit accurately and passsively

Question 41

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

Answer 41

No

Question 42

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

Answer 42

19-5 = 14 mm

Question 43

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

Answer 43

Thickness of remaning dentin

Question 44

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

Answer 44

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

Question 45

When are PP drills useful

Answer 45

For shaping the canal after the GP is removed

Question 46

Which canal should the post be placed in?

Answer 46

The straightest

Question 47

Which canal is used for mandibular molars?

Answer 47

Distal

Question 48

Which canal is used for Mx Molars

Answer 48

Palatal

Question 49

Which way does the palatal canal curve usually

Answer 49

facially

Question 50

What should you always use when placing post and cores

Answer 50

Rubber dam

Question 51

Which canal is preferred in premolars for the Fiber Lux

Answer 51

Palatal

Question 52

What is duralay?

Answer 52

Chemically cured methacrylate resin

Question 53

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

Answer 53

Plastic post corresponding to the size of the last parapost drill

Question 54

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

Answer 54

An anti-rotational groove

Question 55

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

Answer 55

2 mm circumferential

Question 56

What should be remembered about the posts

Answer 56

Used to retain a core Preserve periradicular dentin Use postos of adequate length and diameter Use posts that are retrievable