Endodontic microbiology Flashcards
What disease do we fight in endo?
-Periapical periodontitis
What are the routes of bacteria infection?
- Caries
- Fracture
- Restorative
What gram stain is strep mutans?
-Gram positive
What gram stain is enterococcus faecalis?
-Gram positive
What two bugs do you see in endodontic disease etiology?
- Strep mutans
- Enterococcus faecalis
You don’t typically see apical involvement in an endo case until when?
The pulp tissue is fairly necrotic
What bugs do you see in a retreatment endo case?
-Enterococcus faecalis
What causes the smear layer?
-Instrumentation
T/F Vital pulp canals are usually bug free
-True
T/F Non-vital pulp canals are bug infested
True
What do you do to fight the bugs?
- Asepsis
- Disinfection
- Barrier seal
How many root canals fail without dental dam isolation?
-30-40%
What are disinfecting agents and how do you agitate them?
- Sodium hypochlorite
- EDTA
- Alcohol
- Endo activator to agitate the solution
What are the properties of sodium hypochlorite?
- Antimicrobial
- Dissolve vital and necrotic tissues
- Free chlorine and NaOCl breaks down proteins in to amino acids
- Lubricating
- Toxicity potential
How do you increase disinfection effectiveness with sodium hypochlorite?
- Increase the volume
- Increase the time used
- Agitation
- Warming the solution
What is a good disinfectant material?
-Calcium Hydroxide
What are the qualities of calcium hydroxide?
- Antimicrobial
- Alkaline pH
- Osteogenic capability
What are two things to do with irrigation that increases your bug busting capability?
- Irrigate often
- Agitation
How much sodium hypochlorite do you use in treating a canal?
-at least 2 6cc vials
When calcium hydroxide is added after NiTi instrumentation with NaOCl irrigation how many of the canals were rendered bacteria free?
-93%
If you have irreversible pulpitis and a periradicular diagnosis of normal can you treat it in one visit?
-Yes
If you have irreversible pulpitis and a periradulcar diagnosis of Chronic apical periodontitis can you treat it in one visit?
-No
If you have necrotic pulp with a normal periradiuclar diagnosis can you treat in a single appt?
-No
