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Endodontics > Obturation > Flashcards

Obturation Flashcards

1
Q

Steps to endo:

A

diagnose, pretreat, access, clean and shape, obturate, restore

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2
Q

Define obturation:

A

fill and seal cleaned and shaped canal w sealer and core material

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3
Q

Obturation tech we use at SDM:

A

Warm Vertical condensation

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4
Q

Other methods of obturation:

A

Lateral, Warm Lateral, continuos Wave, Carrier-based, single cone

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5
Q

Do sealer and/or gutta purcha klll bac?

A

no

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6
Q

TF? Obturation greatly affects the success rate of endo tx:

A

F. getting all bac out is most imp

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7
Q

Which tech(s) fill(s) the canal the bast?

A

warm

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8
Q

He invented warm vertical condensation:

A

Herbert

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9
Q

Tech’s we use and lab and clinic:

A

lab: traditional Shilder, clinic: continuous wave of condensation (Buchanan)

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10
Q

How to cut gutta percha:

A

to size of MAF (Master Cone)

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11
Q

Sealer we use:

A

Kerr EWT, which is a ZOE

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12
Q

EWT sf:

A

extended working time, ZOE

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13
Q

Fxn of sealer:

A

interface bw gutta-percha and canal walls, fills voids, seals canals,

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14
Q

TF/ Type of sealer doesn’t change success rate.

A

T

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15
Q

TF? Ensure that no sealer extrudes past the apex, this coul lead to serious issues.

A

F. resorbs over time, doens’t matter if we get a little out of the apex

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16
Q

Fxn of heat carriers:

A

to heat gutta-percha

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17
Q

Sizes of pluggers:

A

8-11

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18
Q

Fxn of plugers:

A

condense gutta-percha

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19
Q

Obturation technique:

A

cone fit, cone fit rg, prefit plugger, mix sealer & seat cone w sealer, add accessory cones IF necessary, downpack, downpack rg (working obturation), backfill

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20
Q

Cone fit should hav tug-back here:

A

apical 3rd of canal

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21
Q

What does tugback indicate?

A

a relative degree of adaptation, at least in2 dimensions, not necessarily 3, though

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22
Q

Getting tugback indicates that you may potentially have achieved this form.

A

resistance form

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23
Q

Use this to trim gutta-percha to MAF:

A

gutta-percha gauge

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24
Q

What might it mena if the gp cone will not fit properly?

A

MAF was not determined properly

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25
His recommendation for gp to use:
Hygienic ADA Size Fine-Medium
26
TF? Gp resorbs over time.
F
27
What is false tugback?
Gp binding coronally due to not having straight line access to root
28
What to do if you are having problems fitting multiple cones:
reassess canal prep, most likely not tapered properly and/or incorrect MAF
29
How close to the WL must hte cone be on rg?
w/in 1mm of WL
30
What may happen if you are binding on canal wall?
you may crack tooth
31
Which pluggers are expected to o about 1/2 the WL?
the larger pluggers: 10,11
32
The smaller plugges are expected to go w/in how many mm of the WL?
5-7mmm size 8,9 pluggers
33
How to choose the correct plugger:
Shouldn't bind walls
34
These should be prefit in canal:
one small plugger, 1 large plugger, 1 heat carrier (to 5-7mm of WL)
35
Which is the limiting instrument?
heat carrier, you won't be ablet o downpack if this doesnt reach 5-7mm
36
Sealer we use:
ZOE
37
What are the powder and liquid portions of ZOE?
powder: zinc oxide and silver liquid: eugenol
38
Mix sealer on:
glass slab
39
Powder to liquid ratio for sealer:
1:1
40
How to know if sealer is proper consistency:
should string up 1 inch
41
Why do you need to measure paper points before placing in canal?
otherwise they may go past foramen
42
What to do before placing gp with sealer:
dry canal w paper points
43
TF? Paper point are used to place sealer.
F
44
GP cut to MAF:
cone
45
How to apply sealer to canal walls:
use cone as brush, 2 coats, seat firmly to WL
46
.What is a "bulk of gp?"
addition of accessory cones IF there is a lot of space bw the cone and canal walls
47
To create space for accessory cones:
endo explorer used as a spreader
48
How to insert accessory cone:
twisting motion, won't got o WL
49
2 phases of obturation;
Downpack, Backfil
50
Downpack;
compaction of incremental segments of heat-softened gp, to create apical plug
51
Purpose of downpacking:
create an apical plug, 3d seal in apical 3rd
52
Instrument to sear off gp at orifice:
glick #2 (endo spoon excavator)
53
What should happen w the placement of heat plugger in canal?
Gp should stick to heat carrier and be removed from canal
54
Plugger to use for condensing gp after searing gp:
larger plugger
55
How far to sink heat carrier into canal:
2mm, remove, condense again
56
Heat carrier is to plugger as:
remove is to recondense
57
To determine if downpack was successful:
Rg from at least 2 angles
58
When to switch from larger plugger to smaller:
once you reach 1/2 WL
59
When to take downpack rg:
small plugger reaches 5-7mm from WL and walls are clean of gp
60
What to assess of downpack rg:
if you reached 5-7mm and if apical 3rd is well filled
61
Defne backfill:
injecting and/or compaction of gp into canal after creating an apical seal
62
Backfill tech:
Cut gp into 2-3mm segments, warm gp in canal, grab a segment of precut gp w heat carrier, heat in flame, place in canal, condense with small plugger
63
Plugger size to use for Backfilling:
small, then large
64
When to switch from small to large plugger in backilling:
once you reach 1/2 WL
65
How to clean gp out of coronal area:
small cotton pellet
66
Why do we stop backfilling when we do?
prevent gp color from effecting tooth esthetic, create an ideal seal of canal
67
Backfill to here for anteriors:
Facial CEJ (or just below)
68
Backfill to here for posteriors:
pulpal floor, which is always at CEJ
69
Take RG's in these 2 views to assess backfilling and downpacking:
clinical and proximal

Endodontics (22 decks)

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