Dental restorative cement is a material used in dentistry to fill cavities, bond restorations, and provide a protective seal for damaged teeth. It is an essential material in restorative dentistry, used for various purposes such as securing crowns, bridges, inlays, onlays, and even orthodontic brackets.
Types of Dental Restorative Cement
1. Glass Ionomer Cement (GIC):
- Composition: Made from silicate glass powder and polyacrylic acid.
Uses:
Often used for filling cavities in areas prone to decay (such as near the gumline) and for securing crowns.
Advantages:
Releases fluoride, which helps prevent further decay, and chemically bonds to tooth structures.
2. Resin-Modified Glass Ionomer Cement (RMGIC):
- Composition: Similar to GIC but modified with resin.
- Uses: Commonly used for cementing crowns and bridges and for lining cavities.
- Advantages: Higher strength and flexibility, with additional fluoride release.
3. Zinc Oxide-Eugenol Cement (ZOE):
- Composition: Contains zinc oxide and eugenol, a soothing agent.
- Uses: Often used as a temporary filling or base under other restorations.
- Advantages: Has a sedative effect on the pulp, making it ideal for temporary use, especially in sensitive areas.
4. Resin Cement:
- Composition: Made from a combination of resins and adhesives.
- Uses: Frequently used for permanent bonding of crowns, inlays, onlays, and veneers.
- Advantages: Strong bonding capabilities, durable, and resistant to moisture, making it ideal for permanent restorations.
5. Zinc Phosphate Cement:
- Composition: Contains zinc oxide and phosphoric acid.
- Uses: Traditionally used for permanent cementation of crowns and bridges.
- Advantages: High compressive strength and durability, though it has less adhesive strength compared to modern cements.
Key Qualities of Dental Restorative Cements
- Adhesion: They should bond effectively to the tooth and restoration surfaces.
- Biocompatibility: Non-toxic and non-irritating to oral tissues.
- Ease of Manipulation: Easy to mix, apply, and set within the op operating time.
- Durability: should withstand the forces of chewing and biting without breaking down.
