Preparations for Zirconia crowns Magnum follows the same principles as for Metal Ceramic
This also applies to the possibility of leaving the core material free of porcelain and polish the surface as on metal. Hence restorations can if necessary be made as thin as the core (0.4 mm). On Zirconia Magnum you normally burned an aesthetic layer of veneering, but can lack of space, or tissue-friendly grounds left in the day.
To achieve best results, certain preparations of technical guidelines be followed. These are recommendations and are not different from comparative Metal Ceramics.
Single crowns/copings. Not bridges. Minimum thickness 0.4 mm.
Dimensions of the preparation
Zirconia Magnum is produced from a solid zirconia blocks. Note that it usually will be an aesthetic layer porcelain buccal that can build 1-2 mm and buccal/lingulat/proximal may be 1-1.5 mm.
Round off sharp edges and corners
As with all prosthetics you achieve a better result if one rounds the sharp edges and corners. This is true for traditional casting techniques and are at least as important in CAD/CAM production.
It usually achieves a higher aesthetic level if the preparation is done with some sort of shoulder. With a chamfer the dental technician get space for porcelain.