Endo Disinfection Flashcards
What are the 2 things you must do to remove bacteria from root canals?
Shape and Irrigate
What are the 2 things irrigant must do?
Remove substrate
Kill bacteria/biofilm
We can access only _____ percentage of the
complex anatomy & “protected areas” by any
instrumentation.
60-70%
What concentration of NaOCl do we use?
8.3% NaOCl
How far should you keep the need from WL?
2 mm
How long should the NaOCl be in contact with the canals? What size should the canal be?
At least 30 minutes; #30
How often should the NaOCl be replenished?
3-5 mins
SHould you bind the needle in the canal
NEVER
\_\_\_\_\_ kills micro-organisms on contact destroys & dissolves substrateDisorganizes Biofilm Dilutes Toxins in canal system Disinfects RC System & Instruments Lubricates Canals Floats out Debris
NaOCl
Typical case requires about
_____ cc. of NaOCl
as irrigant per visit
10-12
T/F: It is important to IRRIGATE
following each ACTIVE
INSTRUMENT
True
What does NaOCl break down into?
NaCl and H2O
When are the 2 times when NaOCl breaks down?
In the bottle
In the tooth
Dakin’s solution is often used
for surface disinfection. It is
_____ NaOCl
0.25%
8.3% NaOCl (Clorox) is _____
times STRONGER and MORE
TOXIC than Dakin’s solutino– also more effective!
33.2x
_____: gas accumulates at apex of teeth; hard to get irrigant thru this
Apical vapor lock
\_\_\_\_\_\_ means: • Flood canal system with NaOCl • Do this EVERY 3-5 minutes • Use a #10 file to WL (as necessary) • Then move on with next active instrument
“Recapitulation”
Strong Oxidizer Powerful Disinfectant Dissolves Necrotic Tissue @low concentration Dissolves Living Tissue @higher concentration Med. of CHOICE (Endodontics)
Strong Oxidizer
Powerful Disinfectant
DANGEROUS !
Extremely TOXIC
If Swallowed: Call Poison Center
1-800-222-1222 KU Med.
Dental Dam must NOT Leak
EYES: Flush w/ water 15 min.
Never forget Eye Protection and
Never PASS anything over Face
Sodium Hypochlorite:
Immediate & Extreme pain for several days Ecchymosis Swelling Temporary disfigurement Court appearance ?
NaOCl incident
T/F: You should
place your gloved hand under
the syringe as you remove it
from the tooth.
True: stains clothes
• This device agitates irrigation solutions during endodontic
treatment. Evidence-based endodontics has shown that cavitation and acoustic streaming significantly improve debridement and the
disruption of the smear layer and biofilm.
!38
May be helpful: Especially in
difficult and unusual canal systems.
Does not diminish time of use for
NaOCl
Endo activator
T/F: Endo Activator doesn’t reduce the overall time required
for effective irrigation of the canals
Trud
________ is produced when we do any
mechanical shaping in dentin. It lies on the
surface of the dentinal tubules.
It is NOT removed by NaOCl and the SMEAR
LAYER occludes access to the Dentinal Tubules
so must be removed to complete the CLEANING
procedure before OBTURATION or when using
various Sealers and Cements.
The SMEAR LAYER
\_\_\_\_\_\_\_ (removes smear layer) is introduced to the canal system and allowed to work for 60 seconds. Then followed by 8.3 % NaOCl to stop action of Ethylene Diamine Tetra-acetic Acid
17% EDTA
Medications placed within the canal system between appointments. Intended
to increase local anti- microbial action and to further decrease the
microbial challenge within the RC system.
intracanal medications
_____: near universal acceptance as the intracanal medication of choice- pH
between 11 and 12- Discourages most microbial growth
- Long lasting (effective over extended periods)
- No reported allergic responses
- Easy to apply & remove as a paste- Available in clinic as “Ultracal”
CaOH:
10ºC/50ºF 4 MINUTES COLD-INDUCED NEURAPRAXIA Antiedema effect Strong Anti inflammatory effect
Cold saline solution
T/F: All potential “Portals of Entry/Exit”
must therefore be sealed creating a Dense Liquid
Tight (Hermetic) Seal “OBTURATION” and FINAL
RESTORATION to PREVENT LEAKAGE
True
