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Endodontics > Obturation > Flashcards

Obturation Flashcards

1
Q

Drying the canal (4)

A

Small tip aspirator
Coarse paper point
Fine paper points
No direct air spray

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2
Q

Fine paper points

A

Use for final WL check

Make sure the canal is not bleeding and check to make sure you are not out of the canal

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3
Q

No direct air spray

A

May create an air embolism

Painful

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4
Q

Clearing the canal

A

Clear the apical debris using a MAF at WL

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5
Q

Apical patency

A 
#10 file .5 - 1mm past the apex
Ensure WL and clear apical portion of canal tissue debris
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6
Q

Ideal sealer properties

A 
Tackiness when mixed
Hermetic seal 
Radiopaque
Very fine powder (smooth mixture)
No shrinkage 
No staining (silver staining)
Bacteriostatic
Slow setting time
Insoluble in tissue fluids
Non-irritating to periradicular tissue
Soluble in commone solvent for removal
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7
Q

Zinc oxide and Eugenol Sealer

A

most common

Grossman’s sealer (Roths)

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8
Q

Resin based sealer

A

Resilon

EndoREZ

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9
Q

CaOH base sealer

A

Sealapex
Good to use on a retreat
* Different bugs with new infection on a retreat

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10
Q

Glass Ionomer sealer

A

Part of a system

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11
Q

Bioceramic

A

BC, MTA

Use with a really infected tooth

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12
Q

How to place sealer?

A 
MAF - spin in reverse
Gutta percha point
Paper point
Lentulo Spiral (not recommended)
Syringe
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13
Q

Core material properties

A

Easily manipulated with ample working time
No shrinkage
Seals laterally and apically - conforms to canal anatomy
Non irritating to PA tissues
Impervious to moisture and non porous
Unaffected by tissue fluids - no corrosion or oxidation
Bacteriostatic
Radioopaque
No discoloration of toothSterilizable
Easily removed if necessary

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14
Q

Core material options (6)

A 
Gutta percha
Silver cones
Paste fillers - CaOH
Paste fillers -- Sargenti 
Paste fillers -- Russian Red
Thermafil, GuttaCore
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15
Q

Gutta Percha

A 
From a tree
20% gutta percha
65% zinc oxide
10% radiopacifiers
5% plasticizers

May come standardized or conventional

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16
Q

Silver cones

A

Oxidation when exposed to moisture

Do not use anymore

17
Q

Sargenti

A

Parafomaldehyde paste
Very toxic
Illegal to use in the US

Easy to blow out the apex

18
Q

Russian Red

A

Difficult to retreat and remove
HARD as a brick

Easy to blow out the apex

19
Q

Thermafil, Gutta Core

A

Plastic carrier covered in gutta percha

May have a gutta percha carrier

20
Q

Standardized Gutta Percha vs Conventional Gutta Percha

A

Standardized – Sizes 15 - 140 (.02, .04, .06 taper)

Conventional – Sizes Extra fine –> Extra large

21
Q

Master cone fit

A

Gutta percha size the same as MAF to within .05 - 1 mm of WL

22
Q

Larger and softened gutta percha

A

Chloropercha
May be 1 mm to 1.5 mm short
Dip in chlorophorm – let dry, push in gutta percha

Use a gutta percha one size larger than MAF

23
Q

Lateral condensation:

Steps for placement

A

Master cone fit

Larger and soften with chloroform (optional)

Spreader placement and removal:
Creating space for accessory points
Conventional gutta percha
Within 2- 3 mm of WL

Correlate spreader and accessory point size/canal size
Place accessory point to fill space
Repeat to coronal 1/3
Sear excess with heated plugger
Vertically compact with double-ended plugger
Clean chamber with alcohol soaked cotton pellet

24
Q

Techniques

A

Lateral compaction

Vertical compaction

25
Q

Finger spreaders

A

Mostly used for lateral condensation
* May have sizes for finger spreaders

Make sure to correlate spreader size with gutta percha size

26
Q

Warm vertical compaction

A

Master cone fit
Apply heated plunger deep to separate the cone around (4-5mm from the tip)
Apply apical pressure to produce hydraulic force to softened GP - moving it apically and laterally
Additional GP sections are added similarly in an incremental fashion to orifice

27
Q

Modified warm vertical compaction

A

Heat source – electrical (system B, elements)
Same sectioned technique
Cut off 4-5mm pack in

Softened backfilling technique
After apical section placed, heated and impacted, softened GP in an electrical gun like device expressed through syringe tip then down packed

Endodontics (6 decks)

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