Introduction
Understanding the disadvantages of dental crowns is essential for patients considering restorative dental treatments. While crowns are highly effective at protecting and restoring damaged teeth, they are not without risks, limitations, and potential complications. Knowing what to expect can help you make informed decisions about your dental care.
In this guide, we will cover the common risks of dental crowns, possible problems after getting a dental crown, whether crowns can fail or crack, and how long dental crowns typically last. We will also provide practical advice on minimising complications and maintaining long-term crown health, all from an Australian dental perspective.
What Are Dental Crowns?
Quick Answer
A dental crown is a tooth-shaped cap placed over a damaged, weakened, or decayed tooth to restore its strength, function, and appearance.
Crowns can be made from porcelain, zirconia, metal, or combinations, and they are commonly used after root canal treatment, for cosmetic enhancement, or to support large fillings.
For patients seeking cosmetic improvements, dental crowns are often combined with other aesthetic treatments.
Common Disadvantages of Dental Crowns
While dental crowns are effective, there are several potential disadvantages that patients should be aware of:
1. Tooth Sensitivity
-
Newly crowned teeth may feel sensitive to hot or cold temperatures.
-
Sensitivity is usually temporary and resolves within a few weeks, but it can persist if the tooth pulp is irritated.
2. Risk of Crown Damage
-
Crowns can fail, crack, or chip over time, especially porcelain crowns on back teeth.
-
Grinding or biting hard objects increases the likelihood of damage.
3. Gum Irritation or Recession
-
Poor oral hygiene or ill-fitting crowns can irritate gums.
-
Receding gums may expose the crown margin, leading to aesthetic issues and decay.
4. Higher Cost Compared to Fillings
-
Crowns require more preparation and lab work than standard fillings, making them more expensive.
5. Irreversibility
-
Tooth structure must be removed to place a crown, so the process is not reversible.
6. Potential for Allergic Reactions
-
Rarely, patients may react to metals used in crowns, though most reactions are minor.
Problems After Getting a Dental Crown
Quick Answer
Common issues include discomfort, bite problems, loosened crowns, and sensitivity.
Detailed Explanation:
-
Discomfort or Bite Issues: If the crown is slightly too high, it can cause pain while chewing. Adjustment by a dentist usually resolves this.
-
Crown Loosening: Cement may weaken over time, causing the crown to become loose. Re-cementing is usually sufficient.
-
Decay at Crown Margin: If oral hygiene is poor, decay can develop at the edge of the crown.
Can a Dental Crown Fail or Crack?
Quick Answer
Yes, crowns can fail or crack, although this is uncommon with modern materials and proper care.
Factors That Increase Failure Risk:
-
Biting hard foods or ice
-
Teeth grinding (bruxism)
-
Large underlying tooth fractures
-
Poor fit or cementation
Prevention:
-
Wear a nightguard if you grind your teeth
-
Avoid excessive force on crowned teeth
-
Maintain regular dental checkups
How Long Do Dental Crowns Last?
Quick Answer
Dental crowns typically last 10 to 15 years, with some lasting 20 years or more.
Factors Affecting Longevity:
-
Material choice: Zirconia and metal crowns last longer than porcelain alone
-
Oral hygiene habits: Brushing, flossing, and regular cleanings
-
Bite forces: Excessive grinding or clenching reduces lifespan
Tip: Routine dental visits help detect minor issues early, extending the crown’s life.
Risks of Dental Crowns
| Risk | Description | Management |
| Tooth Sensitivity | Mild discomfort to temperature changes | Use desensitising toothpaste, short-term relief from painkillers |
| Crown Damage | Cracks or chips, especially porcelain | Avoid hard foods, wear protective devices |
| Loosening | Crown may detach due to cement failure | Re-cementing by dentist |
| Gum Problems | Irritation, recession, or infection | Maintain oral hygiene, regular dental checkups |
| Allergic Reactions | Rare, usually to metals | Discuss material options with dentist |
Real World Example
A patient received a porcelain crown on a molar after a root canal. After two months, they experienced mild sensitivity and noticed a small chip at the edge. The dentist smoothed the chip, checked the fit, and recommended a nightguard. With these precautions, the crown continued to function without further issues for over 10 years.
Cases like this illustrate the importance of patient awareness, regular follow-up, and preventive measures.
Quick Answers to Common Questions
How long do dental crowns last?
Most crowns last 10 to 15 years, though proper care can extend longevity to 20 years or more.
Can a dental crown fail or crack?
Yes, crowns can fail or crack due to excessive force, poor fit, or grinding, but this is uncommon.
What problems can occur after getting a dental crown?
Common issues include sensitivity, discomfort, crown loosening, and gum irritation.
Are dental crowns painful?
The procedure is done under local anaesthetic, so most patients experience minimal discomfort during treatment.
Can crowns cause allergic reactions?
Rarely, some patients may react to metal components, but alternative materials are available.
Why Experience Matters When Getting a Crown
Crowns are technique sensitive. Precision in tooth preparation, fitting, and cementation affects comfort, longevity, and appearance.
At Tooth Heaven, experienced clinicians use high-quality materials and precise techniques to minimise risks and optimise outcomes. You can learn more about our team here:
For personalised advice and treatment planning, contact the Tooth Heaven team.
Conclusion
While dental crowns are highly effective for restoring and protecting teeth, it’s important to understand the disadvantages of dental crowns. Common risks include sensitivity, crown damage, loosening, and gum irritation. Most issues are manageable with proper care, regular checkups, and patient awareness.
For those considering crowns, choosing the right material, experienced clinician, and following preventive care can significantly reduce complications and ensure long-lasting results.
If you are thinking about getting a dental crown or want expert advice on the best treatment options, contact the Tooth Heaven team to book a consultation.