Obturation Flashcards
Eliminate ALL AVENUES OF LEAKAGE from the oral cavity INTO
the ROOT CANAL SYSTEM or OUT OF the ROOT CANAL SYSTEM
INTO the PERIODONTAL or ORAL TISSUES
-RCT Success depends upon thoroughness of
removal of irritants and quality of seal of the
canal system including coronal restoration***
-Seal within the RC system any irritants that cannot
be fully removed during canal cleaning & shaping
and prevent their leakage out to the peri-radicular
tissues or leakage of saliva or other contaminates
into pulp system.
Obturation
–Can be softened by heat and solvents –If heated sufficiently, will change phases –Following softening SHRINKS –GP by itself DOES NOT SEAL –Must consider SEALERS
Gutta Percha:
Is a little sealer ok in PA tissues?
Yes
GP positioned _______ of
the canal exit
1 mm. short
@ WL
What are the 2 obturation techniques?
Cold lateral compaction of GP
Hydraulic Obt Technique
Does the patient need to be assympomatic or symptomatic before we are ready to obturate?
Assymptomatic
Can you obturate a wet root canal?
No
IF there are any symptoms, we will or will not obturate?
WILL NOT
What size taper is the GP?
.02 taper
Make sure the _____ on the
GP cone goes EXACTLY to your
reference point
“mark” dont by pliers
If the master GP cone is too _____, the GP will wrinkle toward the end of the root
Small
MC should not extend past ______
working length
- MC must NOT be able to be pushed beyond WL. (Tap on it to check)
If the MC is NOT TIGHT at WL or pushes longer;
GET A BIGGER MASTER CONE
______ are used to compact the MC gutta percha in the canal
to create space for more Gutta Percha accessory cones to accomplish a
dense fill and thin film of Sealer on the canal.
Finger Spreaders
What size Gp cone is used with red finger spreader?
.20 GP cone (yellow)
What size Gp cone is used with blue finger spreader?
.25 Gp cone (red)
Take a Confirmation “Tree” Film ____ searing
off GP
Before
we have a DIMENTIONALLY STABLE
SEALER
which allows
a more efficient technique.
BC sealer
What size GP cone will be used for hydraulic obturation?
.04 GP cone
“Single Cone” is easily customized if you have additional space that needs filling or if further compaction of the fill is necessary, simply by \_\_\_\_\_ in additional 25/02 cones as necessary without the need of spreading.
darting
Where do you place the tip to extrude sealer into canal?
2-3 mm short of WL
If you have an open apex, do you used CLC-Gp or hydraulic obturation?
Lateral compaction
When is the “tree” x ray taken?
After GP is placed before it is seared
Where should the GP be seared and compacted?
Below level of CEJ
_____ and _____ REQUIRE CROWNS in all
cases to prevent VRF
Premolars and Molars
_____ teeth with minimal loss of tooth
structure may need only a composite restoration
to restore RCT access.
Anterior teeth
Obturate when the canal is __ and patient has
remained _______
dry; asymptomatic
Lateral compaction uses standardized .___ GP
cones and needs finger spreaders (COMPACTION).
______ is needed
.02 GP; Tug-back
Hydraulic obturation technique uses an ___ GP cone
and BC sealer, tug-back is or is not needed?
.04; is not
Sear GP ______, clean the pulp chamber
and seal the canal with GI
below the CEJ
• Round peg in irregular hole
• Corrodes when sealer washes out (silver oxide)
• May stain both tooth & gingiva (Amalgam or silver
Tattoo)
-NOT ACCEPTABLE
SIlver points
• N-2 (Sargenti Technique) • Potential for great damage • Proven Carcinogen • Legal Precedent (Liability) – Any “conventional” paste only obturation is doomed •Paste alone will shrink dissolve & leak
– Paraformaldehyde-containing pastes
The #1 cause of RCT failure
following successful Treatment
is ________
Leakage of Coronal
restoration.
GP is composed primarily of _______
Zinc oxide
