Zirconia dental crowns are renowned for their strength, durability, and natural appearance. However, some patients encounter the frustrating issue of their zirconia crowns turning yellow over time.
Let’s delve into why this happens and what can be done to address and prevent it.
What Are Zirconia Dental Crowns?
Zirconia crowns are made from zirconium oxide, a high-quality ceramic material that mimics the natural tooth’s color and translucency. They are favored for their robust structure and aesthetic appeal.
Causes of Yellowing in Zirconia Crowns
- Damage During Dental Cleaning
- Power Instruments: Tools like the Prophy Jet can damage the glaze on zirconia crowns, making them more susceptible to stains. While effective for natural teeth, these instruments can wear down the crown’s protective layer.
- Acidulated Phosphate Fluoride: This fluoride treatment can etch the glaze on crowns, leading to discoloration.
- Initial Damage or Poor Glazing
- Adjustment Damage: Crowns might be damaged if the dentist needs to grind them for a proper fit, which can lead to yellowing.
- Lab Errors: Improper glazing by the dental lab can cause crowns to yellow prematurely.
- Material Issues
- Surrounding Teeth Whitening
- Optical Illusion: Whitening natural teeth can make zirconia crowns appear yellower in comparison, as whitening treatments don’t affect the color of crowns.
Why Teeth Whitening Won’t Help
Teeth whitening products penetrate tooth enamel to break down stains in the dentin layer.
However, they do not work on zirconia or porcelain materials, so whitening treatments won’t reverse yellowing in crowns.
Preventing Yellowing of Zirconia Crowns
- Maintain Oral Hygiene: Brush and floss daily to prevent plaque buildup.
- Professional Cleanings: Regular dental cleanings can help maintain the appearance of crowns.
- Avoid Staining Foods and Drinks: Limit intake of coffee, tea, red wine, and tobacco.
- Proper Dental Care: Ensure your dentist avoids using damaging instruments and chemicals on your crowns.
Solutions for Yellowed Crowns
- Professional Cleaning
- Surface Stains: A professional cleaning might restore the original color of crowns with surface stains. Dental offices have specialized tools that safely clean both natural teeth and crowns.
- Replacing Damaged Crowns
- Damaged Glaze: Crowns with damaged glaze may need replacement. This involves removing the old crown and placing a new, properly glazed crown.
Seeking Professional Help
If your zirconia crowns are yellowing, consult with your dentist. They can identify the cause of the discoloration and recommend the best treatment. In some cases, replacing the crowns may be necessary to restore their appearance.
Choosing the Right Cosmetic Dentist
Selecting a skilled cosmetic dentist is essential for maintaining and restoring the appearance of zirconia crowns. An experienced cosmetic dentist can provide a thorough examination and recommend the best course of action.
Tips for Long-Lasting Zirconia Crowns
- Avoid Hard Foods: Hard foods can damage crowns. Be mindful of your diet.
- Use a Night Guard: If you grind your teeth, a night guard can protect both natural teeth and crowns.
- Regular Check-Ups: Regular dental visits allow your dentist to monitor your crowns’ condition and catch issues early.
Conclusion
Zirconia crowns are a durable and aesthetically pleasing option for dental restorations. While generally resistant to staining, certain factors can cause them to turn yellow. Understanding these factors and taking preventive measures can help maintain the appearance of your crowns for years.
If you notice discoloration in your zirconia crowns, contact your dentist for professional guidance and treatment options to restore your smile. Schedule a consultation with a cosmetic dentist today to explore your options and keep your smile bright and confident.