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Flashcards in Obturation Deck (27)
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1

Drying the canal (4)

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

2

Fine paper points

Use for final WL check
Make sure the canal is not bleeding and check to make sure you are not out of the canal

3

No direct air spray

May create an air embolism
Painful

4

Clearing the canal

Clear the apical debris using a MAF at WL

5

Apical patency

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

6

Ideal sealer properties

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

7

Zinc oxide and Eugenol Sealer

most common
Grossman's sealer (Roths)

8

Resin based sealer

Resilon
EndoREZ

9

CaOH base sealer

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

10

Glass Ionomer sealer

Part of a system

11

Bioceramic

BC, MTA

Use with a really infected tooth

12

How to place sealer?

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

13

Core material properties

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

14

Core material options (6)

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

15

Gutta Percha

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

May come standardized or conventional

16

Silver cones

Oxidation when exposed to moisture
Do not use anymore

17

Sargenti

Parafomaldehyde paste
Very toxic
Illegal to use in the US

Easy to blow out the apex

18

Russian Red

Difficult to retreat and remove
HARD as a brick

Easy to blow out the apex

19

Thermafil, Gutta Core

Plastic carrier covered in gutta percha
May have a gutta percha carrier

20

Standardized Gutta Percha vs Conventional Gutta Percha

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

Conventional -- Sizes Extra fine --> Extra large

21

Master cone fit

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

22

Larger and softened gutta percha

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

Lateral condensation:
Steps for placement

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

Techniques

Lateral compaction
Vertical compaction

25

Finger spreaders

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

Make sure to correlate spreader size with gutta percha size

26

Warm vertical compaction

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

Modified warm vertical compaction

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