Tooth with a recess in its base face

摘要

The teeth (12) is made from ceramic, composite or plastic and has a basal surface (16) that has a cavity (18), where the elliptic or circular cavity is adjusted at the basal surface. The cavity has a cavity edge (22,24) which is partially extended in an angle of more than 45 degrees, particularly more than 60 or 70 degrees, to the adjacent basal surface. The cavity is formed in cup-shaped manner with a flat cavity base (26) which is curved in flat, but S-shaped manner and is extended opposite to the surrounding basal surface in a parallel manner.