Root Canal Sealer is a dental material used during root canal therapy to fill and seal the small spaces between the root canal walls and the gutta-percha (the main filling material). It helps prevent the re-entry of bacteria and fluids into the root canal system, ensuring a long-lasting, airtight seal for successful treatment.
Types of Root Canal Sealers:
1. Zinc Oxide-Eugenol Sealers: Commonly used and provide good sealing ability with antimicrobial properties. However, they may discolor teeth over time.
2. Calcium Hydroxide Sealers: Known for their antibacterial effects and the ability to stimulate healing, although they may dissolve over time.
3. Epoxy Resin-Based Sealers: Durable and have strong adhesion, commonly used for their long-term sealing ability.
4. Bioceramic Sealers: Biocompatible and ideal for sealing as they expand slightly upon setting, filling any remaining voids in the canal system.
5. Glass Ionomer-Based Sealers: Offer fluoride release and good adhesion to the dentin, although less commonly used compared to other types.
Key Properties:
Adhesion: Provides strong bonding with gutta-percha and dentinal walls to create a sealed environment.
Antibacterial: Many sealers contain ingredients like eugenol or calcium hydroxide that reduce bacterial growth.
Biocompatibility: Ideally, the sealer should be non-irritating to the surrounding tissues for patient safety.
Radiopacity: Sealers are radiopaque so they can be identified on radiographs to ensure the root canal is properly filled.
Application Process:
After cleaning and shaping the root canal, the sealer is applied to coat the canal walls before inserting the gutta-percha cones. Dentists use special instruments to ensure the sealer fills any remaining gaps and provides a complete seal.
Root canal sealers are essential for the success of root canal treatment ( RCT) by ensuring the canal remains sealed, preventing reinfection, and promoting healing. Proper selection and application of the right sealer are key to long-term treatment succe.
