Endodontic Disinfection Flashcards
If we chemically
remove the contents
of the pulpal system
& introduce a dye:
A far more
COMPLEX anatomy
is revealed
Instrumentation fails to
contact with a
large
portion of the hidden
spaces which are filled
with bacteria (and
substrate)
WE MUST:
Remove & Destroy both the Bacteria
and their Substrate to be successful*
We can access only a percentage of the
complex anatomy & “protected areas” by any
instrumentation:
60-70%
–%Sodium
Hypochlorite
(NaOCl)
8.3
OUR MAJOR WEAPONS:
CLEANING AND SHAPING with NaOCl and
INTRA-CANAL MEDICAMENTS
ADMINISTRATION OF NaOCl:
Keeps you —. From WL
2mm
MUST NOT have tip of
syringe beyond
apical
constriction ***
(Do NOT allow tip to BIND in
the canal)
NaOCl — micro-organisms on
contact
kills
NaOCl destroys &
dissolves
substrate
NaOCl fxns (5)
Disorganizes Biofilm
Dilutes Toxins in canal system
Disinfects RC System & Instruments
Lubricates Canals
Floats out Debris
When NaOCl
breaks down,
what do we
have?
NaCl & H2O
WHEN
does it
break
down?
(2)
- In the
bottle - In the
TOOTH *
NaOCl becomes inactive after —
min. in the canal so it must be
replenished every — min.
3-5
Important to IRRIGATE
following
each ACTIVE
INSTRUMENT
Dakin’s solution is often used
for
It is —% NaOCl.
surface disinfection.
0.25
8.3% NaOCl (Clorox) is —
times STRONGER and
MORE TOXIC – also more
effective!
33.2
Typical case requires about —
cc. of NaOCl
as irrigant per visit
10-12
NaOCl must be in contact with shaped canal a
minimum of – minutes after canal enlarged
to #– or larger.
30
30
A canal smaller than #30 will seldom if ever
allow any irrigant to reach the apical 1/3 of the cana
“—” following each active instrument
Recapitulate