Obturation Flashcards
(21 cards)
When should you start obturating?
When RCS can be dried
No pain and or swelling
Asymptomatic tooth
No foul odor
No sinus tract
Types of sealers
ZOE
Calcium hydroxide
GIC
Resin sealers
Silicone based sealers
HCSC sealers
Was based on the hydraulic nature of portland cement used in the construction industry
Mahmmound torabinejad and colleagues translated the use of portland cement for use in clinical dentistry
Hydraulic calcium silicate cement sealers
Classifiations of hydraulic cement
Type 1-5 , cement , radiopacifier, adhesive, water
1 portland cement - +/- , - , +
2. Portland cement +, +, +
3. Portland cement +, +, -
4. Tricalcium/dicacalciums silicate +, +, +
5. Tricalcium/dicalcium silicate + + -
Core materials or hydraulic obturation
Silver points
Acrylic points
Gutta percha
Single cone tecchnique
Hydrauli condensaiton
Steps of hydraulic obturation
GP selection
Final irrigation
Drying of canal
Application of sealers
Insertion off GP
GP bed
Itraorifice barriern
GP selection
- Insert a gp cone same size with MAF
- Check fit, there must be space for hydraulic sealer o flow
- If too tight, check fit of gp one size smmaller than MAF
- Verify with radiograph
- Soak fitted GP to pure NaOCL for 1 min
- Remove sterile GP and place it in a sterile gauze
Final irrigation sequence
5-10ml of Edta for 1min
Wash with nss
1% NaOCL for 10sec
Wash with NSS
Size of paper point needed for drying of canal
Same size and legth with MASTER APICAL FILE
Application of sealer
Insert sealer tip to canal, should not go beyond radicular length
Apply sealer into the coronal and middle third of the canal
Insertion of gutta percha cone
Coat apical third of prefitted and sterile gutta percha
Insert gutta percha to full length
Verify with radiograph
Gp bed sequence
Once quality of obturation is verified, cut gp with heated amalgam plugger
Bed should be 2mm below CEJ
Verify gp Bed depth with radiograph
Intrao orifice barrier sequence
Gic 7/9 is used
Mix gic and place it above the gp bed
Verify with radiograph
Post space may be created prior to placement of gic need to leave 4-5mm from the apex
Temporize
What is the resulting by products
EDTA: retain its calcium complexing ability
NAOCL: redued tissue dissolving ability
None
What is the resulting by products
With potential toxicity
Ability to occlude dentinal tubules
Avoid with the use of: absolute alcohol, saline or distilled water
NaOCL + CHX
(Para chloroanilline or PCA)
Orange brown precipitate
What is the resulting by products
Flush out the EDTA with saline after recommended working time before using CHX or final rinse
EDTA + CHX
White precipitate
Chlorhexidine forming a salt with EDTA
Properties and examples brand
Sucessfully used over many ears
Demonstrates antimicrobial properties
Tubli Seal
Pulp Canal Sealers
Zinc oxide eugenol
Properties and examples brand
Releases calcium hydroxide over long periods providing antimicrobial benefits and claimed to be osteogenic (bone forming)
Sealer needs to be soluble in order to releases calcium hydroxide, which may result in formation of voids in the root canal filling
Poor cohesive strength
Apexit plus
Sealapex
Calcium hydroxide
Properties and examples brand
Long working times
Adheres well tto dentine wall initially but contracts away from the root canal wall on setting
Flows well
Easy to remove
AH Plus
Resin (epoxy resin(?))
Properties and examples brand
Biocompatible
Osteogenic
Improved bone to detine over other seaers
Antimicrobial
Difficult to remove in retreatment cases
MTA FILLAPEX
BioRoot RCS
Totalfill BC sealerss
Bioceramic endo sealers
