Materials

Question 1

Purpose of an irritant

Answer 1

Bacteriocidal
Dissolve organic and informatics debris
Smear layer removal
Aid passage of instruments
Flush out debris

Question 2

Properties of an irritant

Answer 2

Anti microbial
Low surface tension liquid
Lubircate
Remove smear
Biocompatible
Dissolve orangic matter
Low cost / avaliable

Question 3

Sodium hypochlorite pH how to increase effectiveness

Answer 3

11
Temp
Exposure time -40 mins
Copious 10-20ml per canal

Question 6

Properties of chlorhexidine

Answer 6

Very bactericidal
Biocompatible
Good substantivity
Doesn’t dissolve orangic or inorganic tissue
Ph reduces in presence of orangic matter

Question 8

Why shouldn’t you mix irritants ?

Answer 8

Can reduce effectiveness
PCA - orange - chx and sodium hypochlorite

EDTA deactivates naocl by reducing avaliable chloride

EDTA and chx cloudy white precipitate

Question 9

How should hypochlorite be delivered

Answer 9

Side venting locking syringe (1mm ahead) less likely to extrude and space around
Passive
Continuous movement