D6791 Dental Code: Crown Repair – Porcelain/Ceramic
Dental crowns are a crucial restorative solution for damaged or weakened teeth, providing both structural support and aesthetic improvement. However, even the most durable crowns—such as those made from porcelain or ceramic—can sustain damage over time. When a crown chips, cracks, or loses its integrity, the D6791 dental code comes into play, covering the repair of porcelain/ceramic crowns.
This comprehensive guide explores everything you need to know about the D6791 procedure, including its applications, repair techniques, costs, and preventive measures. Whether you’re a dental professional or a patient seeking clarity, this article provides in-depth insights to help you make informed decisions.
2. Understanding the D6791 Dental Code
Definition and Purpose
The D6791 dental code is a Current Dental Terminology (CDT) code used by dentists to bill for the repair of a porcelain or ceramic crown. Unlike a full crown replacement (D2740 for porcelain crowns), this code applies when only a portion of the crown needs restoration.
When Is D6791 Used?
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Chipped or fractured porcelain
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Worn-down ceramic surfaces
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Debonding or minor cement failures
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Cosmetic adjustments (e.g., reshaping or polishing)
This code is not used for:
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Complete crown replacements
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Repairs involving metal substructures (use D6790 instead)
3. Types of Dental Crowns and Their Repairs
| Crown Type | Material Composition | Repair Complexity |
|---|---|---|
| Porcelain/Ceramic | Pure ceramic (e.g., lithium disilicate) | Moderate (D6791 applicable) |
| Porcelain-Fused-to-Metal (PFM) | Porcelain over metal base | Complex (may require D6790) |
| Zirconia | High-strength ceramic | Difficult (often requires replacement) |
| Composite Resin | Tooth-colored resin | Simple (bonding possible) |
4. Common Reasons for Porcelain Crown Repairs
Chipping or Cracking
Porcelain, while durable, can fracture under excessive force (e.g., biting hard objects).
Wear and Tear
Years of chewing and grinding can thin the ceramic layer.
Poor Fit or Cement Failure
If the crown loosens, the underlying tooth may be exposed to decay.
Esthetic Concerns
Discoloration or rough edges may necessitate refinishing.
5. The Crown Repair Process (D6791)
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Diagnosis – X-rays and visual inspection determine the extent of damage.
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Preparation – The damaged area is cleaned and roughened for bonding.
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Bonding – Composite resin or ceramic is applied and shaped.
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Polishing – The repaired crown is smoothed for a natural look.
6. Materials Used in Porcelain Crown Repairs
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Dental Ceramics – Best for seamless repairs.
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Composite Resins – Quick fixes but less durable.
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Adhesive Systems – Ensure strong bonding.
7. Cost and Insurance Coverage for D6791
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Average Cost: $200–$600 per repair.
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Insurance: Many plans cover 50–80% of the cost.
8. Alternatives to Crown Repair
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Full Replacement (D2740) – If damage is severe.
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Veneers/Onlays – For minor cosmetic issues.
9. Preventing Porcelain Crown Damage
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Avoid chewing ice or hard candy.
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Wear a night guard if you grind your teeth.
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Maintain regular dental checkups.
10. Case Studies: Successful D6791 Repairs
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Patient A: Repaired chipped crown with composite—lasted 5+ years.
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Patient B: Refinished worn ceramic—restored function and aesthetics.
11. FAQs About D6791 Dental Code
Q: How long does a porcelain crown repair last?
A: With proper care, 5–10 years.
Q: Does insurance cover D6791?
A: Most plans do, but check your policy.
Q: Can a repaired crown break again?
A: Yes, if subjected to excessive force.
12. Conclusion
The D6791 dental code is essential for repairing porcelain/ceramic crowns without full replacement. Understanding the procedure, materials, and costs helps patients and dentists make informed decisions. Proper care extends crown longevity, but timely repairs ensure continued functionality and aesthetics.
13. Additional Resources
