D6740 Dental Code: Crown – Porcelain/Ceramic Substrate

The D6740 dental code refers to the fabrication and placement of a porcelain or ceramic crown (excluding porcelain-fused-to-metal crowns, which fall under a different code). This code is widely used in dental billing and insurance claims, making it essential for both dentists and patients to understand its scope, benefits, and limitations.

Porcelain and ceramic crowns are popular due to their natural appearance, biocompatibility, and durability. Unlike metal or PFM (porcelain-fused-to-metal) crowns, these restorations are entirely metal-free, making them ideal for patients with metal allergies or those seeking highly aesthetic results.

This guide will explore every aspect of the D6740 code, including:

• The science behind ceramic crowns

• When they are recommended

• How they compare to other crown types

• Cost factors and insurance considerations

• Long-term care and maintenance

2. Understanding Porcelain/Ceramic Crowns

Porcelain and ceramic crowns are full-coverage restorations designed to encase a damaged or weakened tooth. They are fabricated using advanced dental ceramics, which mimic the light-reflecting properties of natural teeth.

Types of Porcelain/Ceramic Crowns

These materials are chosen based on:

• Tooth location (front vs. back teeth)

• Bite force requirements

• Patient’s aesthetic preferences

3. Indications for D6740 Crowns

D6740 crowns are recommended in cases such as:

• Severe tooth decay that cannot be restored with a filling

• Fractured or cracked teeth

• Teeth weakened by root canal treatment

• Cosmetic enhancements (discolored or misshapen teeth)

• Replacing old metal crowns for a more natural look

4. Contraindications and Limitations

While ceramic crowns are versatile, they may not be suitable for:

• Patients with heavy grinding (bruxism) unless high-strength zirconia is used

• Cases requiring extreme durability (metal may be better for back teeth in some patients)

• Situations where minimal tooth reduction is desired (veneers may be preferable)

5. Materials Used in Porcelain/Ceramic Crowns

Key Materials:

1. Feldspathic Porcelain – Best for lifelike translucency.

2. Lithium Disilicate (Emax) – Balances strength and aesthetics.

3. Zirconia – Highest strength, ideal for molars.

Pros and Cons of Each Material

6. The Procedure: Step-by-Step Breakdown

1. Initial Consultation – Examination and treatment planning.

2. Tooth Preparation – Removing decay and shaping the tooth.

3. Impressions/Digital Scan – Sent to the lab for crown fabrication.

4. Temporary Crown Placement – Protects the tooth while the permanent crown is made.

5. Final Crown Cementation – Adjustments for fit and bite.

7. Advantages of Porcelain/Ceramic Crowns

• Aesthetic superiority (matches natural teeth)

• Biocompatibility (no metal allergies)

• Stain resistance (compared to composite)

8. Disadvantages and Potential Complications

• Higher cost than PFM crowns

• Possible chipping if not properly maintained

• Not ideal for heavy grinders (unless zirconia is used)

9. Comparing D6740 with Other Crown Codes

10. Cost and Insurance Coverage

• Average Cost: $1,000 – $2,500 per crown

• Insurance Coverage: Often covers 50% if medically necessary

11. Longevity and Maintenance

• Lifespan: 10-15 years (with proper care)

• Care Tips:

  • Avoid chewing hard objects

  • Maintain good oral hygiene

  • Regular dental check-ups

12. Common Patient Questions and Concerns

• “Does getting a crown hurt?”

• “How long does the procedure take?”

• “Can a ceramic crown stain?”

13. FAQs About D6740 Dental Code

Q: Is D6740 covered by insurance?
A: Most plans cover 50% if deemed medically necessary.

Q: How long does a porcelain crown last?
A: Typically 10-15 years with proper care.

Q: Can a ceramic crown be whitened?
A: No, crowns do not respond to whitening treatments.

14. Conclusion

The D6740 dental code covers high-quality porcelain/ceramic crowns, offering excellent aesthetics and functionality. While more expensive than PFM crowns, they provide superior natural appearance and biocompatibility. Proper material selection and maintenance ensure long-term success.

15. Additional Resources

• American Dental Association (ADA) Crown Guidelines

• [Journal of Prosthetic Dentistry – Ceramic Crown Studies](https://www.journals