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Rockford Health System

Permanent Dental Glue for Crowns: Essential Facts and Best Practices

8 min read
natural tooth crown placement

The choice of permanent dental glue is critical when it comes to ensuring that dental crowns stay securely in place. This special adhesive guarantees the longevity of dental restorations and impacts overall oral health. What makes one type of temporary dental glue much more effective than another? How can you ensure your crowns last as long as possible?

Dive into the world of dental adhesives with us to uncover these answers and more, ensuring your next dental visit is a success.

Introduction to Permanent Dental Glue for Crowns

applied directly

Permanent dental glue plays a pivotal role in restorative dentistry. It ensures that dental crowns adhere securely to the tooth structure for long-term durability and function.

Purpose and Importance

Permanent dental glue, or dental cement, is specifically formulated to create a strong, durable bond between the dental crown and the tooth or abutment teeth. This bond is crucial for the stability and longevity of dental crowns, which restore the appearance and functionality of damaged or decayed teeth.

Types of Cements

Several permanent dental cements are available, including zinc oxide eugenol, glass ionomer, and resin-based cement. Each type has unique properties suited for different clinical situations. For example, glass ionomer cements release fluoride, which can help protect the tooth, while resin-based cements are known for their superior strength and aesthetic qualities.

Application Process

Applying permanent dental glue is a precise process that involves cleaning the tooth surface, applying a small amount of cement, and placing the crown under the right pressure to ensure it fits perfectly without any gaps that could lead to decay or crown failure.


Types of Permanent Dental Glues Available

Permanent dental glues, crucial for the longevity and effectiveness of dental crowns, come in various formulations tailored to meet specific clinical needs and preferences. Each type of permanent cementation offers unique benefits and is chosen based on the dental restoration’s requirements and the patient’s oral health condition.

Zinc Oxide Eugenol

This traditional cement is known for its soothing properties on the pulp and is generally used in temporary crowns or for patients with sensitive teeth. However, its use under permanent restorations is limited due to its weaker bond strength and potential interference with resin adhesives.

Glass Ionomer Cement

Ideal for crowns involving dentin or requiring a chemical bond, glass ionomer cement releases fluoride, which helps prevent decay around the crown’s margins. It bonds directly to the tooth structure and has a low film thickness, which ensures a close fit of the crown.

Resin-Based Cement

Offering the strongest bond strength, these cements are typically used for permanent crowns and bridges, especially in areas requiring high esthetic qualities. Resin-based cements are known for their durability and resistance to solubility, making them a preferred choice for long-term restorations.

Polycarboxylate Cement

Known for its biocompatibility and moderate adhesive properties, polycarboxylate cement is often used when minimal irritation to the pulp is desired. It provides moderate bond strength and is suitable for various dental restorations.

How to Choose the Right Dental Glue for Your Crowns

polyacrylic acid

Choosing the right dental glue for your crowns is a critical decision that impacts the longevity and effectiveness of your crowns and bridges your dental restoration. Here are some important considerations to help guide this choice:

  • Assess Compatibility: Only some dental glues are suitable for some types of crown material. For instance, resin-based cements are ideal for ceramic or porcelain crowns due to their strong bonding capability and aesthetic transparency. In contrast, glass ionomer cements might be recommended for metal crowns because of their chemical adhesion and fluoride release.
  • Consider Oral Health Conditions: If a patient has a history of gum disease or tooth sensitivity, certain cements that offer therapeutic benefits, such as those containing fluoride or having anti-inflammatory properties, might be preferred.
  • Evaluate the Restoration Location: The location of the crown in the mouth influences the type of cement used. A stronger, more durable cement like a resin-modified glass ionomer might be necessary for back teeth that endure more chewing pressure. A color-matching resin cement could be the best choice for front teeth, where aesthetics are more important.
  • Check for Ease of Use: Some cements require meticulous mixing and quick application, while others might come pre-mixed in an automated syringe for easier and more precise application. The choice might depend on the dentist’s preference for handling and setting times.
  • Longevity and Retention Needs: Evaluate how long the crown is intended to last. Permanent cements are designed for long-term use, but a less permanent solution might be considered if the dental work is temporary or the patient’s dental condition is expected to change.
  • Consult Your Dentist: Always involve your dentist in the decision-making process. They can offer awareness based on their experience and understanding of the latest developments in dental cements.

Application Process of Permanent Dental Glue

temporary dental cement

The application process of permanent dental glue for crowns is a meticulous procedure that ensures the crown securely adheres to the tooth, providing durability and stability. Here’s a detailed look at the steps involved:

  • Tooth Preparation: The tooth must be properly prepared before the dental glue is applied. This includes cleaning and sometimes reshaping the tooth to ensure an optimal fit for the crown. The tooth surface may be roughened or etched to enhance the adhesive properties of the glue.
  • Choosing the Right Cement: The dentist selects the most appropriate type of permanent dental glue based on the type of crown and the tooth’s specific needs. Factors considered include the crown’s material, the tooth’s location, and the patient’s oral health.
  • Mixing the Cement: Permanent dental glue often comes in two components that must be mixed before application. This mixing needs to be precise to ensure the cement sets correctly. Some modern cement comes in pre-mixed capsules or automix syringes to simplify this process.
  • Applying the Cement: The mixed dental glue is applied in a thin, even layer inside the crown or directly onto the tooth. The right amount must be used—not too much to avoid excessive overflow and not too little to ensure complete coverage.
  • Placing the Crown: The crown is then carefully placed over the tooth. The dentist will adjust to ensure the crown is perfectly aligned with the bite and adjacent teeth before the cement begins to set.
  • Curing the Cement: Depending on the type of cement, it may need to be light-cured (using a special light to harden the cement quickly), or it may set naturally over a few minutes. During this time, the patient must keep their bite steady.
  • Removing Excess Cement: After the cement has set, the dentist will remove any excess that has squeezed out from under the crown. This is important to prevent irritation and plaque accumulation around the crown.
  • Final Adjustments and Polishing: The dentist may make final adjustments to the crown’s fit and finish by polishing the crown and checking the patient’s bite to ensure comfort and functionality.

Common Issues and Solutions with Dental Crown Glue

While highly effective, the process of securing dental crowns with glue can sometimes lead to issues that require attention and resolution. Here are some common problems associated with dental crown glue and their corresponding solutions:

Poor Fit or Discomfort

Sometimes, a crown may feel uncomfortable or loose because the dental glue did not set properly or because it was not fitted accurately.

Solution: Return to the dentist for an adjustment. The dentist can remove the crown, clean the area, and reapply it with a fresh, cemented-in crown, ensuring a better fit.

Excess Cement Left Behind

Excess cement can escape from under the crown during the setting process and harden around its base. This can lead to gum irritation or make it difficult to clean around the crown.

Solution: The dentist will remove any excess hardened cement using dental tools during a follow-up visit to prevent gum disease and decay.

Allergic Reactions

Some patients may experience allergic reactions to certain types of dental cements.

Solution: It is crucial to inform the dentist about known allergies before the procedure. The dentist can select a hypoallergenic cement less likely to cause a reaction.

Crown Falls Off

This can occur if the dental cement fails to create a strong bond, possibly due to contamination of the bonding surfaces at cementation or an inadequate amount of cement.

Solution: If a crown falls off, keep it safe and contact the dentist immediately. The dentist will clean both the crown and the underlying tooth before recementing the temporary crown, using a stronger or more suitable adhesive.

Decay Under the Crown

Decay can develop under a crown if the cement does not seal properly, allowing bacteria and food particles to enter.

Solution: Regular dental check-ups are crucial for early detection and treatment of decay. The dentist may need to replace the crown and address the decay to prevent further damage.

Sensitivity and Pain

After crown placement, some patients might experience sensitivity to temperature or pressure.

Solution: Sensitivity after crown placement or removal is normal and usually temporary. However, persistent pain may indicate that adjustments are needed or that there are underlying issues, such as nerve damage or infection.

Tips for Maintaining Your Dental Crowns and Ensuring Longevity

Preserving the durability and extending the life of dental crowns require a mix of consistent oral hygiene routines and regular visits to the dentist. Here are some essential tips to help you keep your dental crowns in top condition:

  • Practice Good Oral Hygiene: Brush your teeth at least twice a day and floss regularly. Opt for a soft-bristled toothbrush and gentle toothpaste to prevent scratching the surface of your crowns. Consider using interdental brushes or water flossers for areas around and under the crown to remove plaque and debris effectively.
  • Avoid Hard and Sticky Foods: Chewing on hard objects such as ice, hard candies, or pencils can cause crowns to crack, chip, or come loose. Similarly, sticky foods like caramel can pull on the crown, potentially dislodging it. To protect your crowns, it’s best to avoid these types of foods.
  • Wear a Mouth Guard: If you grind your teeth at night (a condition known as bruxism) or engage in sports, wearing a mouth guard can help protect your crowns from damage. Your dentist can custom-fit a mouth guard to ensure comfort and protection.
  • Regular Dental Visits: Arrange routine dental examinations and cleanings with your dentist every six months. These appointments enable your dentist to oversee the state of your crowns and the teeth beneath, identifying any emerging problems early, like crown displacement or periodontal disease.
  • Avoid Using Crowns as Tools: Do not use your teeth to open packaging, bottles, or anything you should use scissors or a bottle opener for. This can place undue stress on your crowns, leading to damage.
  • Be Mindful of Discomfort: If you experience pain, increased sensitivity, or notice the edge of a crown lifting, contact your dentist immediately. Early intervention can prevent further complications and might save the crown.

In conclusion, the effectiveness and longevity of dental crowns heavily depend on the choice of permanent dental glue for crowns. Understanding the various types available and their specific applications ensures you make an informed decision tailored to your dental needs. Properly applied and maintained permanent dental cement glue secures your crowns and contributes to overall dental health, preventing future complications. Always consult your dentist to select the best adhesive option to keep your dental restorations secure and functional over the long term.


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