Endo Teeth IV

Question 1

How do you determine the size gates you should use for GP removal for a post

Answer 1

Place over the X-ray use only slightly wider than the canal

Minimum size 3

Question 2

The post should be trimmed from the _ side nott the _

Answer 2

(handle) or coronal side… apex

Question 3

The post should be ~_mm from the occlusal surface of the tooth

Answer 3

1.5

Question 4

What are your different cement options for a post

Answer 4

• Fuji I (GI)
• Fuji Plus (RMGI)
• Multi-Link (Resin)
• Flecks ZOP

Question 5

What is the most conventionally used cement for a post

Answer 5

ZOP

Question 6

Why are RMGIs not ideal for post placement

Answer 6

-Can undergo water expasnsion over time due to water absorption

Question 7

What are the down sides of using resin cements for posts like multilink

Answer 7

time consuming and technically demanding

Question 8

Describe the procedure for multilink

Answer 8

Rinse and dry the canal

• Mix primers A and B (1:1)
• Scrub primers into the canal
• Excess material dried with paper points
• Cement loaded on the post and seated

Question 9

Why should multilink never by injected into the post space

Answer 9

avoid premature setting of the cement (This is because the self-cure cement starts to set when it contacts the primers

Question 10

Can ZOP and GI be loaded into the canal? If so then with what?

Answer 10

Yes lentulo spiral

Question 11

Amalgam and resin cores both exhibit low _ strength

Answer 11

tensile

Question 12

(Amalagam/Resin) has a high coefficient of thermal expansion

Answer 12

resin

Question 13

(Amalgam/resin) produces more predictable proximal contacts

Answer 13

amalgam

Question 14

(Amalgam/resin) invovles fewer steps

Answer 14

amalgam

Question 15

(Amalgam/resin) placement of material is faster and easier

Answer 15

resin

Question 16

Fluorocore is a (self/light/dual) cure resin core matierial

Answer 16

dual

Question 17

t/f Fluorocore is not suitable for an intrim restoration

Answer 17

t

Question 18

(Amalgam/resin) can be prepped immediately after placement

Answer 18

resin

Question 19

(Amalgam/resin) better choice for a long term intrim

Answer 19

amalgam

Question 20

Fluorocore requires - min for total self cure

Answer 20

5-7 mins

Question 21

A prefab post and amalgam/resin core requires how many appointments

Answer 21

1

Question 22

Carbon fiber posts are (RL/RO) on X-ray

Answer 22

RL

Question 23

Custom cast post and core requires _ appointments

Answer 23

2

Question 24

Cast post and cores are being critizied for being associated with

Answer 24

vertical root fractures

Question 25

Best use of custom cast post and cores are

Answer 25

Anterior or PM teeth with little remaining tooth structure or when the canal is eliptial/flared

Question 26

What are the advantages and disadvantages of a custom cast post and core

Answer 26

Advantages - Post can fit better to a tapered canal - Core is integral to the post to better strength Disadvantages - 2 appointments - Removal of tooth structure -->POI - Cost= greater - Clinical procedure is more demanding

Question 27

What is the purpose of the positive horizontal stop for the cast post and core

Answer 27

minimize wedging

Question 28

What is the purpose of the vertical wall in the prep for a cast post and core

Answer 28

anti-rotational feature

Question 29

What are the minimum dimensions for the tooth ferrule recieving a cast post and core

Answer 29

1. 5 mm vertical height | 1. 0 mm minimum thickness

Question 30

What to remove for the poronal portion of the toot recieving a cast post and core

Answer 30

- Thin tooth material <1 mm - Undercut tooth structure - Residual caries - Endo temporary - Existing restorative material

Question 31

Cast post and core minimal diameter is

Answer 31

1 mm

Question 32

Issue with cast post and cores with too short radicular structure

Answer 32

- No retention - Increased risk of root fracture - **Same as prefab post

Question 33

To avoid making undercuts in the canal walls with gates when removing GP you should

Answer 33

only touch the canal walls upon removal and not insertion

Question 34

Describe the method of fabricating a cast post and core directly

Answer 34

- Pattern fabricated intraorally - Auto-polymerizing PMMA (GC pattern) - Single canal/ single tooth - Easy access - Contour of final restoration obvious

Question 35

Describe the indirect technique of cast post and core fabrication

Answer 35

- Pattern made in lab - Impression (elastomeric) - Multiple canals/multpile teeth - Problematic access - Contour of final restoration is unusual and need to be considered in context of adjacent and opposing teeth

Question 36

For direct technique which is done first (post adaptation/core formation0

Answer 36

Post adaptation (after lubrication place GC pattern in canal then place the burn out post)

Question 37

What's the working and setting time of GC pattern resin

Answer 37

``` Working= 2-3 min Setting= 4 min ```

Question 38

Plastic burn out post should fit (tightly/loosely) in the canal

Answer 38

loosely

Question 39

What is placed in the canal for indirect fabrication of a cast post and core impression

Answer 39

wire reinforcement

Question 40

The wire reinforcement for the impression should fit tightly or loosely in the canal and why

Answer 40

loosely

Question 41

What metal is used to make the cast post and core

Answer 41

Silver-Palladium

Question 42

Each portion of the cast post and core is possished except the _ and why

Answer 42

Core --> crown retention

Question 43

Why should the cast post and core be made with the minimal expansion technique

Answer 43

So the post will fit