sealer in endodontic.sealer in endodontic pptx

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1. Sealer in endodontic

2. Root Canal Sealers Root canal sealers are used in conjunction with biologically acceptable semi-solid or solid obturation materials to establish an adequate seal of the root canal system.

3. Serves as a filler for canal irregularities and minor discrepancies between the root canal wall and core filling material. To obturate the lateral canals Can assist in microbial control. For radiopacity

4. Should provide an excellent seal when set. Should produce adequate adhesion between itself , the canal walls, and the filing material. Should be radiopaque. Should be nonstaining . Should be dimensionally stable.

5. Should be easily mixed and introduced into the canals. Should be easily removed if necessary. Should be insoluble in tissue fluids. Should be bactericidal or discourage bacterial growth. Should be non irritating to the peri radicular tissues. Should be slow setting to ensure sufficient working .

6. What does a Sealer do? •Antimicrobial Agent • Binding Agent • A filler • A lubricant •Provides radiopacity • As canal obturating material

7. A. Zinc Oxide Eugenol Based Sealers • Most common sealers use ZnO as a base ingredient for the powder. • The liquid usually contains eugenol either alone or in combination with other liquids. • Grossman's Non-staining cement was developed to meet most of his criteria for an ideal RC sealer.

8. Zinc Oxide Eugenol (ZOE) Sealers Advantages: Absorption, if extruded past the apex Anti-inflammatory effects Antimicrobial effects Disadvantages: Transition into a weak, porous state upon setting Shrinkage upon setting

9. Non Staining Cement • Setting time: 2 hours • Sets in the root canal within 10-30 mins due to the moisture of dentin. • Quality of ZnO and pH influence setting. •Plasticity and low setting time. •Good sealing potential and small volumetric change on setting.

10. Grossman's Sealer • Root canal cement is mixed on sterile glass slab with spatula • Two or 3 drops of liquid is used and slowly small increments of cement powder is added to the liquid and spatulated to a smooth creamy consistency. • Consistency is tested by raising the spatula from the slab and checking for a "string out" about 1 inch long.

11. Correct consistency of mixed sealer • Mix should coat the GP cone well. It should not be too thick and neither too thin. • A thick sealer will not allow the GP cone to seal the apex. A thin sealer will not be able to coat the walls properly and may be pushed periapically .

12. B. Calcium Hydroxide Based Sealers • The use of Ca(OH), paste as a root-canal filling material is based on the assumption that there is formation or hard structures or tissues at the apical foramen.

13. Calcium Hydroxide Sealers Advantages Antimicrobial properties Milder cytotoxicity Promotes tissue healing Disadvantages Solubility

14. Sealapex by Kerr • Non eugenol calcium hydroxide polymeric resin root canal sealer. • It is delivered as paste to paste formulation.

15. C. Glass Ionomer Based Sealers Advocated as root canal sealers due to their ability to bind with dentin. Ketac Endo by 3M ESPE is an example. • Not popular as they are difficult to remove during retreatment. Solvents are ineffective against them.

16. Glass Ionomer (GI) Sealers Advantages: Improved adherence (via dentin bonding) Increased resistance to root fracture Enhanced resistance to solubility in tissue fluids Antimicrobial properties Sustained fluoride release Disadvantages: Technically difficult to prepare deep aspects of root canal (potentially limits dentin-bonding ability) Difficult to remove in cases of endodontic retreatment

17. D. Resin Based Sealers • AH26 ( Dentsply DeTrey ) is an epoxy resin containing a nontoxic hardener. •Radio-opacity is imparted by bismuth oxide. • Strong adhesive properties and contracts slightly while hardening.

18. AH26 vs. AH Plus • AH26 was found to release formaldehyde during setting. • AH Plus is a modified formulation of AH26 and doesn't release formaldehyde AH Plus

19. AH Plus Advantages: • Good sealing ability • Biocompatibility to periapical tissues • Moderate antimicrobial activity Dentinal Adhesion Long working time and ease of manipulation.

20. Thank you