D6940 Dental Code: Crown Repair with Suture Retention

Dental procedures are categorized by the American Dental Association (ADA) using standardized codes to ensure uniformity in billing and treatment documentation. One such code, D6940, refers to the repair of a dental crown using suture retention. This procedure is essential when a crown becomes loose or damaged but does not require complete replacement.

Unlike a full crown replacement (D2750), D6940 focuses on stabilizing the existing crown by reinforcing it with sutures or other retention methods. This approach is cost-effective and minimally invasive, preserving the patient’s natural tooth structure while ensuring durability.

In this comprehensive guide, we will explore the indications, procedure, materials, costs, and benefits of D6940, providing dentists and patients with a clear understanding of this specialized dental repair.

2. Understanding Dental Crown Repairs

Dental crowns are prosthetic caps placed over damaged or weakened teeth to restore function and aesthetics. Over time, crowns may become loose due to:

• Cement failure (weakening of the adhesive)

• Tooth decay under the crown

• Physical trauma or excessive bite force

• Normal wear and tear

When a crown is salvageable, D6940 (crown repair with suture retention) is an excellent alternative to a full replacement.

Key Differences Between D6940 and Other Crown Procedures

3. When is D6940 Code Used?

Dentists recommend D6940 when:
✔ The crown is intact but loose (no major cracks or fractures).
✔ The underlying tooth structure is healthy (no significant decay).
✔ The crown margins are still sealed (no leakage causing infection).

Contraindications for D6940

• Severe crown damage (requires D2750 replacement).

• Underlying tooth infection (needs root canal or extraction).

• Poor crown fit (better suited for a new crown).

4. Types of Crown Repairs

A. Suture Retention Method

• Uses biocompatible sutures to secure the crown.

• Ideal for slightly mobile crowns with good marginal integrity.

B. Bonding Reinforcement

• Utilizes dental adhesives (resin cements) for added retention.

• Best for crowns with minor cement failure.

C. Hybrid Approach (Suture + Bonding)

• Combines sutures and adhesive for maximum stability.

5. Materials Used in Crown Repairs

6. Step-by-Step Procedure for D6940

1. Examination & Diagnosis

   • X-rays to assess crown and tooth integrity.

2. Crown Removal & Cleaning

   • Gently detach the crown, clean tooth and crown interior.

3. Suture Placement

   • Secure the crown with sutures if needed.

4. Reattachment with Strong Cement

   • Use high-strength adhesive for long-term retention.

5. Bite Adjustment & Polishing

   • Ensure proper occlusion and smooth margins.

7. Benefits of Suture Retention in Crown Repair

✅ Preserves natural tooth structure
✅ Less invasive than full replacement
✅ Cost-effective for patients
✅ Faster recovery time

8. Common Challenges and Solutions

9. Cost and Insurance Considerations

• Average Cost: $200 – $500 (varies by location).

• Insurance Coverage: Some plans cover D6940 under “major repairs.”

10. FAQs on D6940 Dental Code

Q: How long does a D6940 crown repair last?
A: With proper care, 5-10 years.

Q: Is D6940 painful?
A: No, local anesthesia is used if needed.

Q: Can any dentist perform D6940?
A: Yes, but experience with sutures helps.

11. Conclusion

D6940 (crown repair with suture retention) is a minimally invasive, cost-effective solution for loose crowns. By understanding its indications, procedure, and benefits, dentists can extend crown longevity while patients save money. Always consult a dental professional to determine if D6940 is right for you.

12. Additional Resources

• ADA Dental Codes Guide

• Journal of Prosthetic Dentistry – Crown Retention Studies