Endo Treated Teeth

Question 1

What cements can be used to cement post and core?

Answer 1

Glass ionomer, RMGI, Resin cement

Question 2

Dentist preps tooth and space, and places as prefabed post in, then builds up around it to a final core. Thisis sent to lab for casting. Lab returns the casting and dentist cements it in

Answer 2

Indirect

Question 3

Dentist preps tooth, prepares space and cements in a prefabed post. Once post stable, amalgam and composite core done

Answer 3

Direct

Question 4

What are 4 contraindications for direct post and resin or amalgam cores?

Answer 4

1. Multi-rooted teeth w/ severe bends/ divergent canals
2. Poor oral hygiene
3. Root caries/rampant caries
4. Roots fractured

Question 5

What are 5 problems when fabricating post and core?

Answer 5

1. Fractured root
2. Cracks/voids in resin
3. Cement mixed improperly
4. Poor parallelism (increased stress on post and core)
5. Undercut

Question 6

How much gutta percha is left at the apex with post preparation?

Answer 6

Greater than or equal to 4.0mm

Question 7

6 Gates Glidden matches which Parapost drill and what endo file size/color?

Answer 7

6 Gates, #6 parapost, Green

Question 8

5 Gates Glidden matches which Parapost drill and what endo file size/color?

Answer 8

5 Gates, #5 parapost, Red

Question 9

4 Gates Glidden matches which Parapost drill and what endodontic file size/color

Answer 9

4 Gates ,#4 parapost, Yellow

Question 10

3 Gates Glidden matches which Parapost drill and what endodontic file size/color

Answer 10

3 gate, #3 parapost, Brown

Question 11

According to Dr Haselton, what is probably the most important predictor of clinical success?

Answer 11

The amount of remaining tooth structure

Question 12

What is a parapost?

Answer 12

A parallel-sided post with a patterned surface

Question 13

How much of vertical tooth is required within the walls of the crown?

Answer 13

1-2mm (Ferrule Effect)

Question 14

Is the post diameter primary or secondary to post length as a retentive factor?

Answer 14

Secondary

Question 15

What does increasing the diameter of the post do to a tooth’s resistance to fracture?

Answer 15

Decreases resistance to fracture

Question 16

What happens to a post’s retention as it length increases?

Answer 16

The retention increases

Question 17

Increasing the post length from 5.0 to 8.0mm increases retention by what percentage?

Answer 17

47%

Question 18

How long should the post be?

Answer 18

1. 2/3 length of the canal
2. At least as long as clinical crown
3. Half the bone-supported length of the root

Question 19

Most single rooted teeth have what type of post and core?

Answer 19

Custom cast post and core

Question 20

Double rooted PM, Some single rooted PM, and Molars can have what type of posts?

Answer 20

Pre-fabbed with a direct core

Question 21

What are two types of core material?

Answer 21

1. Amalgam

2. Composite (Z250 or Fluorocore)

Question 22

What are some indications for cast post and core

Answer 22

> 1/2 clinical crown destroyed, endo treated tooth that needs a crown