D6794 Dental Code: Crown Repair – Porcelain/Ceramic Substrate
Dental codes are essential for standardizing procedures, billing, and insurance claims. The D6794 code, as defined by the American Dental Association (ADA), refers to the repair of a prosthetic crown made of porcelain or ceramic substrate. Unlike a full crown replacement, this code applies when a dentist repairs an existing crown rather than fabricating a new one.
Crown repairs are common due to wear, fractures, or aesthetic concerns. Understanding this code helps patients and dental professionals navigate insurance claims and treatment options efficiently.
2. Understanding Dental Crown Repairs
Dental crowns are caps placed over damaged teeth to restore function and aesthetics. Over time, crowns—especially porcelain or ceramic ones—may chip, crack, or loosen. The D6794 code is used when a dentist performs an in-office repair rather than sending the crown to a lab for a full remake.
Key Points About D6794:
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Applies only to porcelain/ceramic crowns.
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Does not cover full replacements (D2740 for porcelain-fused-to-metal or D2750 for full ceramic crowns).
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Used for minor to moderate damage that doesn’t require a new crown.
3. When is D6794 Used?
The D6794 code is applicable in several scenarios:
Common Reasons for Porcelain/Ceramic Crown Repairs
| Issue | Description |
|---|---|
| Chipping | Small porcelain fractures due to biting hard objects. |
| Cracking | Hairline fractures that don’t compromise structure. |
| Debonding | Crown loosens but remains intact. |
| Aesthetic Adjustments | Color mismatch or surface roughness. |
If the damage is severe (e.g., a large fracture or decay underneath), a full replacement (D2740/D2750) may be necessary.
4. Types of Porcelain/Ceramic Crown Repairs
Depending on the damage, dentists may use different repair techniques:
A. Direct Composite Bonding
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Uses tooth-colored resin to fill chips.
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Quick, cost-effective, and done in one visit.
B. Porcelain Recontouring
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Reshapes the crown’s surface for better fit or aesthetics.
C. Re-cementation
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If the crown is intact but loose, it can be re-bonded.
D. Lab-Assisted Repairs
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For extensive damage, the crown may be sent to a lab for reinforcement.
5. Step-by-Step Procedure for Crown Repair (D6794)
A typical D6794 procedure involves:
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Examination & Diagnosis – X-rays to assess damage.
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Cleaning & Preparation – Removing debris and roughening the surface.
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Bonding Agent Application – Ensures adhesion.
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Composite Layering – For chips or cracks.
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Polishing & Adjusting Bite – Smoothing and ensuring proper fit.
6. Materials Used in Porcelain/Ceramic Repairs
| Material | Use Case |
|---|---|
| Dental Composite | Small chips, color matching. |
| Porcelain Repair Kits | Lab-grade ceramic repairs. |
| Resin Cement | Re-attaching loose crowns. |
7. Benefits of Repairing vs. Replacing a Crown
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Cost-Effective – Repairs are cheaper than new crowns.
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Time-Saving – Done in one visit vs. multiple lab appointments.
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Preserves Tooth Structure – Avoids unnecessary tooth reduction.
8. Common Issues Leading to Crown Repairs
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Bruxism (Teeth Grinding) – Causes microfractures.
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Trauma – Accidents or hard foods.
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Aging – Normal wear over 10-15 years.
9. Cost and Insurance Coverage for D6794
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Average Cost: $150-$400 (vs. $800-$1,500 for a new crown).
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Insurance: Many plans cover repairs if medically necessary.
10. FAQs About D6794 Dental Code
Q1: How long does a porcelain crown repair last?
A: Repairs can last 3-7 years, depending on care.
Q2: Can all dentists perform D6794 repairs?
A: Most general dentists can, but complex cases may require a prosthodontist.
Q3: Does a repaired crown look natural?
A: Yes, modern composites blend seamlessly with porcelain.
11. Conclusion
The D6794 dental code covers porcelain/ceramic crown repairs, offering a cost-effective alternative to replacements. Understanding this code helps patients make informed decisions about their dental care. Always consult your dentist to determine if a repair is suitable for your case.
12. Additional Resources
