- to provide the
basis for good fit between the crown and tooth, and good
adaptation between the crown margin and finish line.
- to create
adequate space for both the core material and the porcelain
veneering.
- to give
esthetically pleasing results, not least in regard to the
appearance of the crown margin.
- to maximize the
biocompatible conditions for long-term function.
- to provide
retention.
Procera®
Tooth Preparation
For Procera®
restorations, a tooth preparation of the chamfer type is the
optimum choice. The preparation design is analogous to the
architecture of the natural tooth.
Chamfer
preparation is characterized by thinned margins and a
cutting with rounded inner angles and edges.
To attain
optimum adaptation, the occlusal surfaces of posterior teeth
should have a relatively flat surface topography.
When it comes
to preparation depth, the veneering potential of Procera®
AllCeram permits a variation in preparation depth of between
0.8-1.5 mm.
For occlusal
surfaces in general, and for Procera® the same reduction is
recommended as for metal ceramics, depending on the clinical
situation.
