D6722 Dental Code: Crowns – Porcelain Fused to Noble Metal
Dental crowns are a cornerstone of restorative dentistry, providing both functional and aesthetic solutions for damaged or decayed teeth. Among the various types of crowns, the D6722 dental code represents a porcelain-fused-to-noble-metal crown—a durable and reliable option that combines the strength of noble metals with the natural appearance of porcelain.
This comprehensive guide explores everything you need to know about D6722 crowns, from material composition to procedural steps, advantages, disadvantages, and cost considerations. Whether you’re a dental professional seeking in-depth knowledge or a patient considering this treatment, this article will provide valuable insights.
2. Understanding the D6722 Dental Code
Definition and Purpose
The D6722 code, as defined by the American Dental Association (ADA), refers to a crown restoration where porcelain is fused to a noble metal alloy base. Noble metals include gold, platinum, and palladium, which are highly resistant to corrosion and biocompatible with oral tissues.
Comparison with Other Crown Codes
| Dental Code | Crown Type | Material Composition | Best For |
|---|---|---|---|
| D6722 | Porcelain-Fused-to-Noble-Metal | Porcelain exterior, noble metal base | Molars, premolars requiring strength & aesthetics |
| D2740 | All-Porcelain/Ceramic | Fully ceramic (no metal) | Anterior teeth (high aesthetics) |
| D2790 | Full Metal Crown | Gold or base metal | Posterior teeth (maximum durability) |
| D2752 | Zirconia Crown | High-strength zirconia oxide | Both anterior & posterior (balance of strength & aesthetics) |
This table highlights how D6722 crowns compare with other common crown types, helping dentists and patients make informed decisions.
3. Materials Used in Porcelain-Fused-to-Noble-Metal Crowns
Noble Metals: Gold, Platinum, Palladium
Noble metals are prized for their:
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Corrosion resistance (unlike base metals, they don’t oxidize)
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Biocompatibility (minimal risk of allergic reactions)
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Longevity (can last 15+ years with proper care)
Porcelain Composition and Benefits
The porcelain layer is customized to match the patient’s natural tooth shade, providing:
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Aesthetic appeal (more natural than full metal crowns)
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Stain resistance (less prone to discoloration compared to resin crowns)
4. Indications for D6722 Crowns
This crown type is ideal for:
✔ Posterior teeth (molars and premolars needing strength)
✔ Patients with metal allergies (noble metals are hypoallergenic)
✔ Cases requiring a balance of durability and aesthetics
5. Step-by-Step Procedure for D6722 Crown Placement
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Tooth Preparation – Removal of decay and shaping the tooth.
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Impression Taking – Digital or traditional molds sent to the lab.
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Temporary Crown Placement – Protects the tooth while the permanent crown is fabricated.
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Final Cementation – The custom crown is bonded securely.
13. Frequently Asked Questions (FAQs)
Q1: How long does a D6722 crown last?
A: With proper care, these crowns can last 10-20 years, depending on oral hygiene and bite forces.
Q2: Are noble metal crowns safe for MRI scans?
A: Most noble metal alloys are non-ferromagnetic, but always inform your radiologist.
Q3: Can a D6722 crown be used for front teeth?
A: While possible, all-porcelain (D2740) or zirconia crowns (D2752) are often preferred for better aesthetics.
14. Conclusion
The D6722 dental code for porcelain-fused-to-noble-metal crowns offers an excellent balance of strength, longevity, and aesthetics, making it a preferred choice for posterior teeth restorations. While it may not be the best for highly visible anterior teeth, its durability and biocompatibility make it a reliable option for many patients.
15. Additional Resources
