irrigation

Question 1

Sodium hypochlorite has been shown to be an effective root canal irrigant due to its bactericidal, bacteriostatic effect in addition to its tissue dissolution properties

Answer 1

Martin 1975

Question 2

Irrigation protocol by Schafer. Schafer 2007

Answer 2

1. Size of apical preparation: at least size 35 

2. After access cavity: flush the canals with 
NaOCl 

3. Between instruments: 2–5 ml of NaOCl 
per canal 

4. After shaping: 5–10 ml of NaOCl per canal 

5. After shaping: irrigation with 5 ml of EDTA 
per canal for 1 minute (or with citric acid) 

6. Final rinse with 2 ml NaOCl per canal 

7. Optional: final irrigation with chlorhexidine 

8. Optional: rinse with alcohol before obturation

Question 3

Flare-up has no significant influence on the outcome of endodontic treatment

Answer 3

Sjogren et al. 1990

Question 4

0.5% NaOCl was just as effective at higher conc w/o all the cytotox (however, did not look at tissue dissolution capacity)

Answer 4

Sprandberg 1973

Question 5

60 necrotic teeth irrig w/ 0.5% or 5% NaOCl. Showed about the same number w/o growth 12/20 & 14/20 respectively

Answer 5

Bystrom & Sundqvis 1985t