Obturation

Question 1

What can you use to dry?

Answer 1

• Small tip aspirator (saliva ejector with large gauge needle tip)
• Coarse paper point
• Fine paper points
• No direct air spray

Question 2

What do you use fine paper points for in drying?

Answer 2

-The final Working Length check

Question 3

What do you use to establish apical patency?

Answer 3

10 K file

Question 4

What do you use to clear apical debris?

Answer 4

-Master Apical File to the Working Length

Question 5

How far do you want your patency file to go through?

Answer 5

.5-1mm

Question 6

What are ideal sealer properties?

Answer 6

• 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

Question 7

What are the sealers used today?

Answer 7

• Zinc-Oxide and Eugenol (Grossman’s Sealer (Roth’s))
• Resin-based
• CaOH
• Glass Ionomer
• Bioceramic (newest material)

Question 8

What do you use in the sealer placement?

Answer 8

• MAF (master apical file
• Gutta Percha point
• Paper point
• Lentulo spiral
• Syringe

Question 9

How do you use the MAF to place a sealer?

Answer 9

-Spin the file in reverse after coating the MAF

Question 10

How do you use a Gutta percha point to place sealer?

Answer 10

-Run gutta percha through to coat the canal walls

Question 11

What properties do you want the core materials to have?

Answer 11

• 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

Question 12

What is Gutta percha made of?

Answer 12

• 20% Gutta percha
• 65% zinc oxide
• 10% radiopacifiers
• 5% plasticizers

Question 13

What are some core materials used today?

Answer 13

-Gutta percha
-Silver Cones
-Paste fillers
Thermafil (Hot dog on a stick)

Question 14

What is Sargenti N2 Paste?

Answer 14

-Paraformaldehyde (Very toxic)

Question 15

T/F Silver Cones can cause staining

Answer 15

True

Question 16

What are the standardized sizes of Gutta Percha?

Answer 16

15-140 with different tapers (02 taper most common)

Question 17

What are the convential sizes of Gutta Percha?

Answer 17

• Extra fine
• fine fine
• fine
• fine medium
• medium
• large
• extra large

Question 18

What should the Master cone fit be?

Answer 18

-The same as the MAF

Question 19

What do you correlate the spreader size with?

Answer 19

-Accessory Point size/canalsize

Question 20

Anything over a 40 what spreader color do you use?

Answer 20

Blue = Medium/fine

Question 21

Anything under a 40 what spreader color do you use?

Answer 21

-Red D11T = fine/fine

Question 22

How long do you have to place accessory point to fill space?

Answer 22

6 seconds

Question 23

What do you use to sear excess with?

Answer 23

-Heated Plugger (Glick)

Question 24

What do you do for lateral compaction/condensation?

Answer 24

• Prepare canal
• Insert master cone
• Spreader place
• Place accessory cone
• continue until complete obturation

Question 25

What do you use in warm vertical compaction?

Answer 25

- Master Cone Fit - Heat - Pressure - Additional GP sections

Question 26

What do you use the heat for in the warm vertical compaction?

Answer 26

-To separate the cone and heat and to soften apical section

Question 27

After using the heated plugger what do you do?

Answer 27

-Apply apical pressure to produce hydraulic force to softened GP moving it apically and laterally

Question 28

What is the modified warm-vertical compaction technique sometimes referred to as?

Answer 28

-System B

Question 29

How is the modified warm vertical compaction done?

Answer 29

-Either the same sectioned technique used in the warm vertical technique or use the softened backfilling technique

Question 30

What is the softened backfilling technique?

Answer 30

-After apical section placed, heated and compacted, softened Gutta Percha in an electrical gun-like device expressed through syringe tip, then down-packed