clinical endodontics III Flashcards
why do we have to chemo mechanical preparation
- instruments do not really clean the canals
- need to irrigate
what is the purpose fo irrigation
- remove debris to prevent canal blockage (physical)
- tissue dissolution (chemical)
- biofilm removal (physical)
- antimicrobial (chemical )
what are the choice of irritants
- LA
- Water
- Saline
Problem: No effect beyond physical flushing - Iodine
- EDTA
- chlorhexidine
- Sodium hypochlorite
what are irritants ideal properties
what properties do sodium hypochlorite have
what are disadvantages of sodium hypochlorite
what does chlorhexidine advantages and sidavantegs of irritant
- antibacterial 2%
- substantivity
- rleatevly chepa
disadvantages
- does not dissolve tissue
- cannot be mixed with sodium hypochlorite
carcignoegnci precpitiate produced - partially block root canal
what are advantages of EDTA
What are disdavnategs fo EDTA
what is the irrigation protocol
Sodium hypochlorite must be signed for on clinic
- delivered using side vented needle syringe
- essential not to wedge syringe in canal
- sodium hypochlorite reservoir is pumped up and down
why do we obturate canals
what are the different ways to get bacteria back into root canal
what are aims of obturation
what are problems with obturation
- complex root canal
- difficult to seal
what do we need to make sure before obturating
- canal is fully prepared
- canal must be dry
- free any sinuses relived
if we cannot obturate what do we need to do
dress the canals - prevent bacteria getting back in
- calcium hydroxide
high PH
or odontopaste - anti inflammatory
what is gutta perch chemically
1 ,4 trans polyisporene
- exist in 2 forms
alpha and beta
what do we use for obturation
what are gutta percha points made of
what do we use in combination with gutta percha
sealer
why do we use sealer
RF - root filling
what are sealer ideal properties
describe different types of sealers used
name different types of obturation techniques
what is the most common tenchqiue
describe the 1st step of cold lateal impaction
describe the second step of cold lateral compaction
describe the 3rd step fo cold lateral impaction
describe the 4th step of cold lateral impaction
describe the 5th step of cold lateral compaction
describe the final step of cld lateral compaction
what would you do once all GUTTA PERCHA has fit in the canal
what do we do once the canal is obturated
after cold lateral compaction
- cute back GP to removed everything form pulp chamber
-seal GP coronally - coronal restoration
why is RCT difficult
- AGPs
are files single or multi use
SINGLE USE
