1. Importing Digital Design:

   • Start by importing the digital design file of the zirconia crown or bridge created in Exocad into the milling software.

2. Material Setup:

   • Configure the milling machine for zirconia material, specifying the type of zirconia and any additional parameters required for optimal milling.

3. Fixturing:

   • Secure the zirconia block onto the milling machine's worktable using an appropriate fixture. Ensure proper alignment and stability for accurate milling.

4. Calibration:

   • Calibrate the milling machine to ensure precise movements and alignment. This step is crucial for maintaining accuracy during the milling process.

5. Tool Selection:

   • Choose the appropriate milling tools based on the design specifications and the properties of zirconia. The selection of tools may include different sizes and types for roughing and finishing.

6. Toolpath Generation:

   • Generate toolpaths within the Exocad software to guide the milling machine in carving out the digital design from the zirconia block. Consideration is given to factors such as milling strategy and tool engagement.

7. Milling Process:

   • Initiate the milling process, during which the milling machine precisely removes material from the zirconia block according to the specified design. This step requires a combination of rotational and translational movements of the milling tools.

8. Coolant and Dust Management:

   • Employ a cooling system to manage heat generated during milling. Additionally, implement dust extraction systems to maintain a clean working environment and prevent contamination.

9. Quality Monitoring:

   • Monitor the milling process in real-time or through periodic checks to ensure the accurate reproduction of the digital design. Address any issues promptly.

10. Post-Milling Inspection:

    • Inspect the milled zirconia crown or bridge for any irregularities, deviations, or inaccuracies. Check the surface finish and overall quality.

11. Sintering:

    • If applicable, perform the sintering process to achieve the final strength and characteristics of the zirconia material. This step is essential for transforming the milled restoration into its fully dense form.

12. Final Quality Check:

    • Conduct a final quality check to verify the accuracy, fit, and integrity of the milled zirconia crown or bridge against the original digital design.

13. Delivery to Dental Office:

    • Deliver the completed zirconia restoration to the dental office for further steps in the dental prosthetic workflow, including try-in and placement.

Milling zirconia crowns or bridges with Exocad ensures a precise and efficient manufacturing process, contributing to the production of high-quality dental restorations with excellent fit and durability.