best permanent dental cement for crowns

3 min read 14-10-2024

Finding the Right Fit: A Guide to Permanent Dental Cements for Crowns

A crown is a dental restoration that completely covers a damaged or weakened tooth, restoring its form and function. But a crown is only as good as the cement that holds it in place. Choosing the best permanent dental cement for your crown is crucial for its longevity and your comfort. This guide will break down the key factors to consider when selecting a cement for your crown, using insights from reputable sources like ScienceDirect.

What Makes a Cement "Permanent"?

Before diving into specific cement types, let's clarify what "permanent" means in this context. Dental cements are typically classified as either temporary or permanent.

Temporary cements are used to temporarily hold a crown in place while it is being evaluated for fit and occlusion.
Permanent cements, on the other hand, are designed to provide a long-lasting bond between the crown and the prepared tooth.

However, even permanent cements are not truly permanent. Over time, they can wear down, become compromised, or even fail due to factors like bacterial contamination, biting forces, or poor oral hygiene.

Key Factors to Consider When Choosing Cement:

1. Composition and Properties:

Resin-based cements: These are widely used for crowns due to their high bond strength, biocompatibility, and ease of use. They offer good esthetics, especially in the anterior teeth. (Source: "Contemporary Dental Cements: Materials, Properties and Clinical Applications" by B.E. Ferreira, M.M. Azevedo, et al. Dental Materials, Volume 28, Issue 5, 2012, Pages 439-451.)
Glass ionomer cements: While less common for crowns, they are a good option for teeth with high levels of moisture or for patients with a history of sensitivity. They release fluoride, which helps prevent tooth decay. (Source: "Glass-ionomer Cements: Past, Present and Future" by J.M. Wilson. Dental Materials, Volume 23, Issue 12, 2007, Pages 1144-1152.)

2. Bond Strength and Retention:

Micromechanical bonding: Resin-based cements achieve strong bonds by creating microscopic interlocks between the cement and the tooth structure.
Chemical bonding: Some cements rely on chemical reactions to form a strong bond.

3. Biocompatibility:

The cement should be biocompatible, meaning it does not cause irritation or allergic reactions in the mouth.

4. Esthetics:

For crowns in the anterior teeth, the color of the cement should match the natural tooth color.

5. Ease of Use:

The cement should be easy to apply and remove, as needed.

6. Cost:

Different cements vary in cost. It's important to discuss your budget with your dentist.

Common Types of Permanent Dental Cements:

1. Resin-based cements:

Self-adhesive cements: These require no separate bonding agent and can be applied directly to the tooth. (Source: "Self-Adhesive Resin Cements: Properties, Clinical Applications and Future Directions" by H.W. Ferracane, M.A. Manhart. Dental Materials, Volume 30, Issue 1, 2014, Pages 2-18.)
Conventional resin cements: These require a separate bonding agent to create a strong bond.

2. Glass ionomer cements:

These cements are often used for fillings but are less common for crowns. They release fluoride, which helps prevent decay.

3. Hybrid cements:

These combine properties of resin and glass ionomer cements, offering a balance of strength, biocompatibility, and fluoride release.

Beyond the Basics: Additional Considerations:

Tooth sensitivity: For patients with sensitive teeth, your dentist may recommend a cement with a low polymerization shrinkage or a desensitizing agent.
Crown design: The design of your crown can also influence the choice of cement. For example, crowns with a large contact area may require a stronger cement.

Choosing the Right Cement: Your Dentist's Role:

The best permanent dental cement for your crown is a decision that should be made in consultation with your dentist. They will carefully evaluate your individual needs and the characteristics of your crown to recommend the most suitable cement for your specific situation.

Remember: The success of your crown restoration depends on the quality of the cement used. Choose a dentist who has experience with different types of cements and can provide you with informed guidance to ensure a long-lasting and comfortable restoration.