Causes and solutions of edge chipping during operation of glass-ceramic restorations

1. Regularly calibrate according to the calibration time of the equipment used to ensure accuracy;

2. The use time of the bur used in the equipment should be recorded. Too much cutting and repair will cause the bur to wear. Different repair types will have different degrees of wear on the bur. Replace the new needle in time;

3. The edge of the abutment should be prepared with sufficient thickness, and a minimum support of 1mm is required, otherwise the excess bevel or the excessively thin edge will cause a lot of burrs;

4. After the cutting is completed, a special bur should be used for the grinding of the glass-ceramic restoration;