·Shoulder preparations should not be prepared at corners and sharp edge areas. Shoulder preparations must be rounded Inner edge or bevel.
· It is required to reserve 1mm space for cutting edge preparation to ensure that the ceramic block can achieve the ideal grinding effect during CAD / CAM processing.
· If possible, it is best to prepare only the enamel layer of the incised edge, and avoid preparing in the stress concentrated point area
Ceradirect glass ceramic
| Geometries | Strength | Type | |
| C14 | C14(18*13*15) | 400±60Mpa | Lithium disilicate |
| B32 | B32(32*15*15) | 400±60Mpa | Lithium disilicate |
| B40 | B40(40*15*14) | 400±60Mpa | Lithium disilicate |