The S6845KR is a modified taper, with a coarse (green) grit bur used for inlay/onlay preparation.
Cavity Preparation | S-Diamonds® The opening of the cavity and the initial preparation are noticeably simplified with the help of these structured diamond instruments. The use of S-Diamonds is highly recommended for increased efficiency. Their particular advantages make structured diamond instruments especially suitable for a gentle treatment.
Structured blank In order to prevent the formation of micro cracks, it is recommended to use instruments with rounded edges (to be recognised by the letters KR in the figure number). The red marking illustrates the different distribution of forces.