on a central incisor receiving a full ceramic restoration, during finishing

on a central incisor receiving a full ceramic restoration, during finishing of the:

• A- shoulder finish line subgingivally.
• B- Diamond end cutting.

The correct answer is: B. Diamond end cutting

Diamond end cutting is the appropriate technique for finishing the shoulder finish line of a full ceramic restoration on a central incisor. This is because diamond burs are specifically designed for cutting ceramic materials and can produce a smooth, polished finish without damaging the restoration.

Here's why the other options are incorrect:

• A. Shoulder finish line subgingivally: While a shoulder finish line is often used for full ceramic restorations, it is typically finished supragingivally (above the gum line) to avoid irritation and potential complications. Finishing the shoulder finish line subgingivally can increase the risk of gingival inflammation and recession.

Therefore, diamond end cutting is the most appropriate and safe method for finishing the shoulder finish line of a full ceramic restoration on a central incisor.

Finishing a Full Ceramic Restoration on a Central Incisor: A Deeper Look

Understanding the Shoulder Finish Line:

The shoulder finish line is a type of preparation margin used in dental restorations. It involves creating a chamfered or beveled edge around the tooth preparation. This design allows for a more esthetic and biocompatible restoration, as it minimizes the risk of gingival irritation and recession.

The Importance of Proper Finishing:

Proper finishing of the shoulder finish line is crucial for the success of a full ceramic restoration. A well-finished restoration will not only look more natural but will also be more durable and less prone to chipping or fracture.

Diamond End Cutting: The Ideal Technique

• Precision and Control: Diamond burs are specifically designed for cutting ceramic materials with precision and control. They are less likely to cause damage to the restoration or surrounding tissues.
• Smooth Finish: Diamond burs can produce a very smooth and polished finish, which is essential for a natural-looking restoration.
• Reduced Risk of Fracture: A well-finished restoration is less likely to fracture or chip, ensuring its longevity.

Other Finishing Techniques:

While diamond end cutting is the preferred technique for finishing a full ceramic restoration on a central incisor, other techniques may be used in certain situations:

• Carbide burs: Carbide burs are also suitable for finishing ceramic restorations, but they may not provide as smooth a finish as diamond burs.
• Grinding stones: Grinding stones can be used to remove excess material and shape the restoration, but they may not be as precise as diamond burs.

Additional Considerations:

• Polishing: After finishing the restoration with a diamond bur, it is important to polish it to a high shine. This will help to improve the esthetics of the restoration and prevent plaque buildup.
• Cementation: The type of cement used to bond the restoration to the tooth can also affect the overall outcome. A strong and biocompatible cement is essential for a successful restoration.
• Bite verification: After cementation, it is important to verify the bite to ensure that the restoration is not interfering with the patient's occlusion.

By following these guidelines and using appropriate finishing techniques, dentists can ensure that full ceramic restorations on central incisors are both esthetic and functional.