D6985 Dental Code: Fixed Partial Denture Retainers – Crowns
The D6985 dental code is a critical classification used in restorative dentistry, specifically for fixed partial denture (FPD) retainers involving crowns. This code is essential for dental billing, insurance claims, and treatment documentation.
Fixed partial dentures, commonly known as dental bridges, replace missing teeth by anchoring artificial teeth (pontics) to adjacent natural teeth or implants. The D6985 code applies when a crown is used as a retainer to support the bridge.
This article provides an in-depth exploration of the D6985 code, covering its clinical applications, materials, procedural steps, insurance implications, and more. Whether you’re a dentist, dental student, or patient, this guide will enhance your understanding of this crucial dental procedure.
2. Understanding Fixed Partial Dentures (FPDs) and Their Components
A fixed partial denture (FPD) is a non-removable prosthetic device used to replace one or more missing teeth. It consists of:
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Pontics (artificial teeth replacing missing ones)
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Retainers (crowns or inlays/onlays that anchor the bridge)
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Connectors (the link between pontics and retainers)
The D6985 code is exclusively for crown retainers, distinguishing it from other retainer types (e.g., inlays/onlays under D6980).
3. Detailed Breakdown of D6985: Crown Retainers
The D6985 code is defined as:
“Fixed partial denture retainer – crown”
This means it applies when a full-coverage crown (metal, ceramic, or hybrid) is used to support a dental bridge.
Key Features of D6985 Crowns:
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Provides maximum retention and stability for the bridge.
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Requires tooth preparation (reduction of tooth structure).
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Can be made from various materials (PFM, zirconia, gold).
4. Types of Crowns Used Under D6985
| Crown Type | Material Composition | Advantages | Disadvantages |
|---|---|---|---|
| Metal Crowns | Gold, Nickel-Chromium | High durability, minimal wear on opposing teeth | Aesthetic concerns (metallic appearance) |
| PFM Crowns | Metal base + Porcelain | Good strength & aesthetics | Porcelain may chip over time |
| All-Ceramic | Zirconia, Lithium Disilicate | Best aesthetics, biocompatible | Less strength than metal |
| Zirconia Crowns | High-strength ceramic | Excellent durability & aesthetics | Higher cost |
5. Clinical Indications for D6985
D6985 is used when:
✔ A tooth requires a full-coverage crown to support a bridge.
✔ The abutment tooth has significant decay or damage.
✔ A long-span bridge needs strong retention.
Contraindications:
✖ Insufficient tooth structure for crown retention.
✖ Poor oral hygiene (risk of secondary decay).
6. Step-by-Step Procedure for Placing a Crown Retainer
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Diagnosis & Treatment Planning
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X-rays, impressions, and shade selection.
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Tooth Preparation
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Reducing the tooth to accommodate the crown.
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Impression Taking
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Digital scans or traditional molds sent to the lab.
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Temporary Crown Placement
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Protects the tooth while the permanent crown is fabricated.
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Permanent Crown Cementation
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Final crown is bonded using dental cement.
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7. Materials Used in Crown Retainers
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Metals (Gold, Cobalt-Chromium): High strength, long-lasting.
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Porcelain-Fused-to-Metal (PFM): Balances aesthetics and durability.
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Zirconia: Metal-free, strong, and highly aesthetic.
8. Benefits and Limitations of Crown Retainers
Pros:
✅ Strong, long-term solution for missing teeth.
✅ Improves chewing efficiency and speech.
✅ Prevents adjacent teeth from shifting.
Cons:
❌ Requires irreversible tooth reduction.
❌ Higher cost compared to removable options.
9. Comparing D6985 with Other Dental Codes
| Code | Description | Key Difference |
|---|---|---|
| D6985 | Crown retainer for FPD | Full-coverage crown |
| D6980 | Inlay/onlay retainer for FPD | Partial coverage |
| D6750 | Implant-supported crown | Uses an implant |
10. Insurance and Reimbursement Considerations
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Most dental insurance plans cover 50-80% of D6985 costs.
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Pre-authorization may be required.
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Out-of-pocket costs range $800–$2,500 per crown, depending on material.
11. Common Patient Questions and Concerns
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“Does getting a crown hurt?”
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No, local anesthesia ensures a painless procedure.
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“How long do crown retainers last?”
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10–15 years with proper care.
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12. Case Studies and Real-World Applications
Case Study 1:
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A 45-year-old patient missing two molars received a 3-unit bridge with D6985 zirconia crowns.
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Result: Restored function and aesthetics with no complications after 5 years.
13. Future Trends in Fixed Partial Dentures
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Digital Dentistry: CAD/CAM for faster, more precise crowns.
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3D-Printed Crowns: Potential cost reduction and customization.
14. Conclusion
The D6985 dental code is essential for crown-retained fixed partial dentures, offering durability and functionality. Understanding its applications, materials, and insurance factors helps dentists and patients make informed decisions. With advancements in dental technology, crown retainers continue to evolve, providing better outcomes for tooth replacement.
15. FAQs
Q1: Is D6985 covered by insurance?
A: Most plans cover it partially; check with your provider.
Q2: How long does a crown retainer last?
A: Typically 10–15 years with good oral hygiene.
Q3: Can a crown retainer be repaired if damaged?
A: Yes, depending on the extent of damage.
16. Additional Resources
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American Dental Association (ADA): www.ada.org
