Dental crowns are a common restorative treatment used to protect and strengthen damaged teeth. While the term "permanent dental glue" might conjure images of a super-strong adhesive, the reality is a bit more nuanced. This comprehensive guide will explore the materials and methods dentists use to securely attach crowns, addressing common questions and misconceptions.
What is Used to Cement Dental Crowns?
Dental crowns aren't simply glued on; they're cemented into place using specialized dental cements. These cements are chosen based on various factors, including the type of crown, the patient's overall health, and the dentist's preferences. Common types include:
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Resin cements: These are popular due to their aesthetic qualities and ease of use. They're often preferred for anterior (front) crowns where the color of the cement is more visible. Some resin cements offer self-etching properties, simplifying the preparation process.
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Glass ionomer cements: These release fluoride, which helps to protect the tooth structure from decay. They are often chosen for their biocompatibility and are suitable for patients with sensitive teeth.
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Zinc phosphate cements: These have been used for a long time and are known for their strength and durability. However, they can be more irritating to the pulp (the soft inner part of the tooth) than other cements.
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Hybrid cements: These combine the properties of resin and glass ionomer cements, offering a balance of strength, aesthetics, and fluoride release.
How Long Does Dental Crown Cement Last?
The longevity of a dental crown's cementation depends on several factors, including:
- The quality of the cement: Higher-quality cements generally last longer.
- The dentist's technique: Proper preparation and cementation are crucial for long-term success.
- Oral hygiene: Excellent oral hygiene helps prevent bacterial growth that can compromise the bond between the crown and the tooth.
- Bruxism (teeth grinding): Excessive grinding can put significant stress on the crown and cement, leading to earlier failure.
- Dietary habits: Consuming extremely hard foods or biting down on hard objects can damage the crown or its cement.
While there's no definitive timeframe, a well-cemented crown can last for many years, often a decade or more, before requiring recementation.
Can Dental Crowns Fall Out?
Yes, although it's relatively uncommon for a properly cemented crown to fall out completely. However, various factors can weaken the bond over time, leading to potential issues:
- Cement degradation: Over time, the cement can degrade due to chemical reactions or bacterial activity.
- Trauma: A significant blow to the tooth can dislodge a crown.
- Tooth decay: Decay around the margins of the crown can weaken the bond.
- Fractured tooth: If the underlying tooth structure fractures, the crown can become loose.
If you notice any looseness, sensitivity, or changes in the appearance of your crown, it's crucial to contact your dentist immediately.
Is There a Permanent Dental Glue for Crowns?
There isn't a single "permanent" dental glue. The cements used are designed to provide a strong, long-lasting bond, but they are not impervious to degradation or external factors. The term "permanent" is relative in dentistry; even the best restorations may eventually require repair or replacement.
What Happens if My Crown Falls Off?
If your crown falls off, you should contact your dentist as soon as possible. In the meantime, you can try to temporarily re-seat the crown using dental adhesive (available at most pharmacies), but this is only a temporary solution. Do not attempt to use household adhesives.
How Much Does it Cost to Re-cement a Crown?
The cost of recementing a crown varies depending on your location, insurance coverage, and the specific needs of your case. It's typically less expensive than getting a new crown.
This information is for general knowledge only and does not constitute medical advice. Always consult with a qualified dentist for any concerns about your dental health.
