Non-Surgical Retx

Question 1

Primary cause of endo failure.

Answer 1

Bacteria

Question 2

Most recovered species in secondary endo infection.

Answer 2

e. faecalis

Question 3

Most common fungus in secondary endo infection.

Answer 3

Candida

Question 4

Causes of secondary infection

Answer 4

Coronal leakage
New crack
Lack of aseptic initial tx

Question 5

How long does GI temp restoration last for an RCT tooth?

Answer 5

1-3 months

Question 6

Gutta percha that has been exposed to the oral cavity for how long should be re-temporized and observed for 3-6 months?

Answer 6

3 months

Question 7

What’s the most common reason for endo failure?

Answer 7

Short fill (46.5% of the time).

Question 8

Bur used to cut thru porcelain crowns.

Answer 8

Diamond

Question 9

Bur used to cut thru metal crowns.

Answer 9

Metal cussing burs (cross-cut)

Question 10

Bur used to cut thru Lithium disilicate/zirconia crowns.

Answer 10

Fine diamonds

Question 11

When accessing a retreat, what do you follow for the long axis ?

Answer 11

Buccal CEJ

Question 12

Used to remove metal posts.

Answer 12

Ultrasonic

Question 13

Used to remove fiber posts.

Answer 13

Drill it out!

Question 14

Used to remove CORONAL gutta percha.

Answer 14

Gates Glidden

Question 15

Used to remove APICAL gutta percha.

Answer 15

Chloroform

Question 16

Most common solvent for removing gutta percha bc it’s the most effective.

Answer 16

Chloroform

Question 17

What medicament do we use in endo retreatment that is not used in initial therapy?

Answer 17

Leave Ca(OH)2 in the canal for 7 days to reduce the bacterial load.

Question 18

An acute exacerbation of an asymptomatic pulpal or periradicular pathosis after initiation or continuation of root canal treatment.

Answer 18

Flare-up

Question 19

t/f:

Flare-ups tend to be higher in retreats at 13.6%

Answer 19

True