Periradicular Surgery Flashcards Preview

Oral Surgery > Periradicular Surgery > Flashcards

Flashcards in Periradicular Surgery Deck (8)
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1
Q

Aims of PR surgery
(2)

A
  1. Achieve apical seal
  2. Remove existing infection
2
Q

Possible causes of Endo failure
(12)

A

-calcification
-broken instrument
-root dilaceration
-root #
-underfilled
-overfilled
-open apex
-lateral canals
-lateral perforation
-poor host tissue response
-apical cyst/other inf
-poor coronal seal/pros failure

3
Q

Suggesrt some flap designs for PRS
(4)

A

-semilunar
-2 sided
-3 sided
-Ochsenbein-Luebke flap

4
Q

Describe the steps for PRS

A

-LA
-cut flap
-retract tissue
-bone removal - electric hp
-apex removal 3mm
-enucleation of granulation tissue
-seal
replace flap and suture
-seal

5
Q

Suggested retrograde sealers

A

-amalgam (seldom)
-MTA
-resin modified ZOE

6
Q

Suggested method of removal of old root filling

A

Ultrasonic

7
Q

Properties of RM ZOE
-positive
-negative

A

-Cheap
-Easy to use
-Radiopaque
-Bacteriostatic

-Sensitive to moisture
-May resorb
-Doesn’t promote cementogenesis

8
Q

Properties of MTA
-positive
-negative

A

-Moisture resistant’
-Promotes cementogenesis
-Very good seal

-Expensive
-Long setting time
-Difficult to use
-can cause dryinging/reduction in moisture in canal = tooth more brittle/prone to #