Op 2 - Endo Teeth

Question 1

Some gutta percha is removed to make space for the post, but 3-5mm is left apically. What 6 things do we want out of the post space?

Answer 1

Apical seal
Minimal canal enlargement
Adequate post length
Positive horizontal stop
Vertical wall to prevent rotation
Margin extension

Question 2

Which teeth rarely require a post, unless there has been significant loss of tooth structure?

Answer 2

Molars

(usually just do an amalgam buildup extending into canals)

Question 3

Which teeth require a post if most coronal tissue is missing?

Answer 3

Anteriors
Premolars

Question 4

How many mm is ferrule effect?

Answer 4

1.5 - 2.0 mm

Question 5

360º collar of the crown, surrounding
the parallel walls of the dentin, extending coronal to the margin of the preparation

Answer 5

Ferrule effect

Question 6

In mandibular molars, an ___________ foundation is retained by a cemented prefabricated post in the distal canal

Answer 6

amalgam

Question 7

What is required if both of the following clinical conditions exist?

1. The remaining coronal tooth structure is inadequate for the retention of the restoration
2. When there is sufficient root length to
   accommodate the post while maintaining an adequate apical seal (minimum 3-5 mm gutta percha at apex)

Answer 7

Post

Question 8

If a post is too long, then it can affect the ________ _______ or risk root perforation

Answer 8

apical seal

Question 9

Primary purpose is to retain the core that can be used to support the final restoration

Answer 9

Posts

Question 10

When most coronal tissue is missing from an _________ tooth or _________, a cast post and
core is indicated to obtain optimal tooth preparation form

Answer 10

anterior; premolar

Question 11

Full coverage or resin?

Whenever a previous large/multiple Class III, IV, and V restorations are present in an anterior tooth

Answer 11

Full coverage

Question 12

Full coverage or resin?

Whenever a previous large MOD, MO or DO
restoration is present in a posterior tooth

Answer 12

Full coverage

Question 13

Full coverage or resin?

Conservative endodontic access opening with previous class III or V restoration in an anterior tooth

Answer 13

Resin

Question 14

Full coverage or resin?

Conservative endodontic access opening and intact marginal ridges in a posterior tooth

Answer 14

Resin

Question 15

What is the greatest contribution to loss of tooth strength in endo teeth?

Answer 15

Loss of marginal ridge integrity