D6624 Dental Code: Bridge Pontics – Cast High Noble Metal
Dental procedures are categorized using standardized codes established by the American Dental Association (ADA). These codes ensure uniformity in billing, insurance claims, and treatment documentation. One such code, D6624, refers to a bridge pontic made of cast high noble metal.
This article provides an in-depth exploration of the D6624 dental code, its clinical applications, benefits, and how it compares to alternative materials. Whether you’re a dental professional, a student, or a patient seeking detailed information, this guide will help you understand why high noble metal pontics remain a preferred choice in certain restorative cases.
2. Understanding Bridge Pontics in Dentistry
A pontic is an artificial tooth used in a dental bridge to replace a missing natural tooth. Pontics are anchored to adjacent teeth (abutments) or dental implants. The design and material of a pontic significantly influence its durability, aesthetics, and functionality.
Types of Pontic Designs
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Ridge Lap Pontic: Contacts the gingival ridge.
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Modified Ridge Lap: Improved hygiene and aesthetics.
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Ovate Pontic: Ideal for aesthetic zones, sits slightly into the gum.
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Sanitary/Hygienic Pontic: Elevated design for easier cleaning.
The D6624 code specifies a cast high noble metal pontic, which is known for its strength and biocompatibility.
3. What Does the D6624 Code Specifically Cover?
The D6624 code applies to:
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Cast high noble metal pontics (at least 60% noble metals, with 40% gold content minimum).
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Used in fixed partial dentures (bridges).
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Does not include the abutment crowns or framework—only the pontic itself.
Key Features of High Noble Metal Alloys
| Property | Description |
|---|---|
| Composition | ≥60% noble metals (gold, platinum, palladium) |
| Corrosion Resistance | Highly resistant to tarnishing |
| Biocompatibility | Minimal allergic reactions |
| Durability | Long-lasting with minimal wear |
4. Materials Used in High Noble Metal Pontics
High noble metal pontics consist of:
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Gold (Au) – Provides malleability and corrosion resistance.
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Platinum (Pt) – Increases strength and melting point.
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Palladium (Pd) – Enhances hardness and reduces cost compared to pure gold.
These metals ensure:
✔ Superior longevity (20+ years with proper care).
✔ Minimal plaque accumulation (smoother surface than porcelain).
✔ Excellent marginal fit (reduces bacterial leakage).
5. Benefits of Cast High Noble Metal Pontics
Advantages Over Other Materials
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Strength: Withstands high occlusal forces.
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Precision Fit: Casting ensures accuracy.
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Biocompatibility: Rarely causes allergic reactions.
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Wear Compatibility: Gentle on opposing teeth.
Disadvantages
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Higher cost than base metal alloys.
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Less aesthetic (metallic color, often used in posterior regions).
6. Comparison with Other Pontic Materials
| Material | Pros | Cons |
|---|---|---|
| High Noble Metal (D6624) | Durable, biocompatible, precise fit | Expensive, not tooth-colored |
| Porcelain-Fused-to-Metal (PFM) | Aesthetic, strong | Porcelain may chip |
| Zirconia | Highly aesthetic, strong | Brittle under extreme pressure |
| Base Metal Alloys | Cost-effective | May cause allergies, less precise fit |
7. Step-by-Step Procedure for Placing a D6624 Pontic
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Diagnosis & Treatment Planning
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Assess the missing tooth space and abutment teeth.
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Decide between implant-supported or tooth-supported bridges.
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Tooth Preparation
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Reshape abutment teeth for crowns.
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Take impressions for the dental lab.
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Fabrication
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The lab casts the pontic using high noble metal alloy.
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Fitting & Cementation
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Check fit and occlusion before permanent cementation.
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8. Common Challenges and Solutions
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Allergic Reactions: Rare, but nickel-free alternatives exist.
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Cost Concerns: Discuss payment plans or insurance coverage.
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Aesthetic Limitations: Use in posterior regions where metal is less visible.
9. Cost Considerations and Insurance Coverage
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Average Cost: $800–$1,500 per pontic.
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Insurance Coverage: Often partially covered under major restorative benefits.
10. Case Studies and Clinical Applications
Case 1: A 55-year-old patient with a missing molar received a D6624 pontic, which lasted 25 years without complications.
Case 2: A patient with metal allergies was successfully treated with a high noble metal bridge due to its hypoallergenic properties.
11. Maintenance and Longevity
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Oral Hygiene: Brush, floss, and use antimicrobial rinses.
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Regular Checkups: Ensure proper fit and detect wear early.
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Avoid Hard Foods: Prevents unnecessary stress on the bridge.
12. Frequently Asked Questions (FAQs)
Q1: Is a high noble metal pontic safe for MRI scans?
A: Yes, but inform the radiologist as it may cause minor artifacts.
Q2: Can a D6624 pontic be used in the front teeth?
A: Rarely, due to its metallic appearance. PFM or zirconia are better for aesthetics.
Q3: How long does a cast high noble metal pontic last?
A: 20+ years with proper care.
13. Conclusion
The D6624 dental code represents a cast high noble metal pontic, offering unmatched durability and biocompatibility. While it may not be the most aesthetic option, its strength and precision make it ideal for posterior restorations. Understanding this code helps dentists and patients make informed decisions for long-term oral health.
14. Additional Resources
