Obturation Flashcards
What can you use to dry?
- Small tip aspirator (saliva ejector with large gauge needle tip)
- Coarse paper point
- Fine paper points
- No direct air spray
What do you use fine paper points for in drying?
-The final Working Length check
What do you use to establish apical patency?
10 K file
What do you use to clear apical debris?
-Master Apical File to the Working Length
How far do you want your patency file to go through?
.5-1mm
What are ideal sealer properties?
- Tackiness when mixed
- Hermetic Seal
- Radiopaque
- Very Fine Powder
- No shrinkage on setting
- No staining of tooth structure
- Bacteriostatic
- Slow setting time
- Insoluble in Tissue Fluids
- Non-irritating to periradicular tissue
- Soluble in common solvent for removal
What are the sealers used today?
- Zinc-Oxide and Eugenol (Grossman’s Sealer (Roth’s))
- Resin-based
- CaOH
- Glass Ionomer
- Bioceramic (newest material)
What do you use in the sealer placement?
- MAF (master apical file
- Gutta Percha point
- Paper point
- Lentulo spiral
- Syringe
How do you use the MAF to place a sealer?
-Spin the file in reverse after coating the MAF
How do you use a Gutta percha point to place sealer?
-Run gutta percha through to coat the canal walls
What properties do you want the core materials to have?
- Easily manipulated with ample working time
- Dimensionally stable no shrinkage
- Seals laterally and apically
- Non irritating to PA tissues
- Impervious to moisture and non-porous
- Unaffected by tissue fluids
- Inhibits bacterial growth
- Radiopaque
- Does not discolor tooth structure
- Sterilizable
- Easily removed
What is Gutta percha made of?
- 20% Gutta percha
- 65% zinc oxide
- 10% radiopacifiers
- 5% plasticizers
What are some core materials used today?
-Gutta percha
-Silver Cones
-Paste fillers
Thermafil (Hot dog on a stick)
What is Sargenti N2 Paste?
-Paraformaldehyde (Very toxic)
T/F Silver Cones can cause staining
True
