Obturation

Question 1

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.

Answer 1

Obturation

Question 2

–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

Answer 2

Gutta Percha:

Question 3

Is a little sealer ok in PA tissues?

Answer 3

Yes

Question 4

GP positioned _______ of

the canal exit

Answer 4

1 mm. short

@ WL

Question 5

What are the 2 obturation techniques?

Answer 5

Cold lateral compaction of GP

Hydraulic Obt Technique

Question 6

Does the patient need to be assympomatic or symptomatic before we are ready to obturate?

Answer 6

Assymptomatic

Question 7

Can you obturate a wet root canal?

Answer 7

No

Question 8

IF there are any symptoms, we will or will not obturate?

Answer 8

WILL NOT

Question 9

What size taper is the GP?

Answer 9

.02 taper

Question 10

Make sure the _____ on the
GP cone goes EXACTLY to your
reference point

Answer 10

“mark” dont by pliers

Question 11

If the master GP cone is too _____, the GP will wrinkle toward the end of the root

Answer 11

Small

Question 12

MC should not extend past ______

Answer 12

working length

Question 13

• 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;

Answer 13

GET A BIGGER MASTER CONE

Question 14

______ 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.

Answer 14

Finger Spreaders

Question 15

What size Gp cone is used with red finger spreader?

Answer 15

.20 GP cone (yellow)

Question 16

What size Gp cone is used with blue finger spreader?

Answer 16

.25 Gp cone (red)

Question 17

Take a Confirmation “Tree” Film ____ searing

off GP

Answer 17

Before

Question 18

we have a DIMENTIONALLY STABLE
SEALER
which allows
a more efficient technique.

Answer 18

BC sealer

Question 19

What size GP cone will be used for hydraulic obturation?

Answer 19

.04 GP cone

Question 20

“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.

Answer 20

darting

Question 21

Where do you place the tip to extrude sealer into canal?

Answer 21

2-3 mm short of WL

Question 22

If you have an open apex, do you used CLC-Gp or hydraulic obturation?

Answer 22

Lateral compaction

Question 23

When is the “tree” x ray taken?

Answer 23

After GP is placed before it is seared

Question 24

Where should the GP be seared and compacted?

Answer 24

Below level of CEJ

Question 25

_____ and _____ REQUIRE CROWNS in all

cases to prevent VRF

Answer 25

Premolars and Molars

Question 26

_____ teeth with minimal loss of tooth
structure may need only a composite restoration
to restore RCT access.

Answer 26

Anterior teeth

Question 27

Obturate when the canal is __ and patient has

remained _______

Answer 27

dry; asymptomatic

Question 28

Lateral compaction uses standardized .___ GP
cones and needs finger spreaders (COMPACTION).
______ is needed

Answer 28

.02 GP; Tug-back

Question 29

Hydraulic obturation technique uses an ___ GP cone

and BC sealer, tug-back is or is not needed?

Answer 29

.04; is not

Question 30

Sear GP ______, clean the pulp chamber

and seal the canal with GI

Answer 30

below the CEJ

Question 31

• Round peg in irregular hole
• Corrodes when sealer washes out (silver oxide)
• May stain both tooth & gingiva (Amalgam or silver
Tattoo)
-NOT ACCEPTABLE

Answer 31

SIlver points

Question 32

• 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

Answer 32

– Paraformaldehyde-containing pastes

Question 33

The #1 cause of RCT failure
following successful Treatment
is ________

Answer 33

Leakage of Coronal

restoration.

Question 34

GP is composed primarily of _______

Answer 34

Zinc oxide