8. Endo Treated Teeth I

Question 1

Normally we use (minkin/minim) pins

Answer 1

minim (gray)

Question 2

(Smaller/larger) pins are more retentive

Answer 2

larger

Question 3

How much heathy dentin do you want around the pin

Answer 3

1 mm

Question 4

How much space should be left between minim and minikin pins

Answer 4

minim= 5 mm or more
minikin= 3 mm or more

Question 5

_ mm of pin is in the restoration

Answer 5

2

Question 6

If a narrow single rooted tooth with little coronal structure is present what may need to be done to ensure adequate retention of the core

Answer 6

elective endo

Question 7

What are the different instances we may decide to do elective endo

Answer 7

• Stressed tooth
• Pulp symptoms
• Little tooth remaining
• When Post op endo would compromised retention/resistance
• Substantial perio and tooth reduction for restorative space

Question 8

What should be done when a pulpal blush occurs during preparation

Answer 8

• Observe
• Elective endo
• *Depends
• Symptoms and discoloration (gray) indicate the need for RCT

Question 9

Reading on slide 11

Answer 9

ok

Question 10

Why is it difficult to do endo through a crown

Answer 10

Accessing and finding canals is a challenge

Question 11

What is the main concern with performing a RC through a crown

Answer 11

-You don’t know how much tooth structure you are removing. If you remove too much coronal tooth structure the restoration will more than likely fail

Question 12

Ideal treatment for a tooth with a crown that needs RCT is what

Answer 12

• Remove the crown
• Evaluate the tooth for restorablility
• Endo if restorable

Question 13

What is the main treatment consideration when performing RCT on a tooth that will need a crown

Answer 13

Conserve tooth structure!

• Avoid excessive widening of the canal
• More tooth structure more strength

Place a good intrim

• Maintain endo seal
• Prevent re-infection

Protect against fracture

• Replace the cavit with amalgam or resin ASAP if definitive treatment is to be delayed
• Place a provisional with light contacts
• Advise limited function on that tooth (weakened tooth –> non-restorable fracture)

Question 14

Excessive widening of the canals makes the tooth more prone to what

Answer 14

root fracture

Question 15

When do you restore endo-treated teeth

Answer 15

In general asap but it depends.

• A long standing lesion needs time to heal
• Questionable prognosis needs time to evaluate

Question 16

Before restorative treatment the endo treated tooth must be evaluated for…

Answer 16

• Good apical seal
• No sensitivity to percussion
• No exudate
• No fistula
• No apical sensitivity
• No active inflammation

Question 17

A BW X-ray (is/isn’t) adequate for endo screening before a crown

Answer 17

isn’t

Question 18

Can you restore an endo treated tooth that is still symptomatic

Answer 18

No- Endo department will not obturate the canal and complete RCT if the tooth is still experiencing symotoms

Question 19

What is the minimal thickness for cavit

Answer 19

4 mm

Question 20

Cavit should be used for Class _ scenarios only

Answer 20

1

Question 21

Cavit leakage can occur in as little as (how long?)

Answer 21

3 weeks

Question 22

How will you be able to tell if there was leakage after removing the cavit

Answer 22

cotton should be clean and dry

Question 23

Which has a better seal IRM or cavit

Answer 23

IRM

Question 24

Which can be used for a class II prep (IRM/cavit)

Answer 24

IRM

Question 25

If delay is anticipated after the completion of RCT before restoration what should you do

Answer 25

Remove the temporary and place a more definitive restoration (i.e amalgam, resin, GI IX or II LC