Komet USA has launched three diamond instruments that incorporate depth markers. The markers are identified by the letter "D" for "depth" in the reference number, according to the company.
The marks indicate the required minimal occlusal thickness for all-ceramic inlay and partial-crown restorations, including those fabricated with CAD/CAM or conventional techniques. The coarse-grit, rounded-edge, tapered 6847KRD.FG.016 diamond features depth markers at 2 mm and 4 mm. The shorter, rounded-edge, tapered 959KRD.FG.018 and the 845KRD.FG.025 diamonds provide depth marks at 2 mm and 4 mm and at 2 mm, respectively.
These depth-marked instruments are available individually and as components of the Komet Expert Kit 4562ST, which has been developed to simplify and systematize the precise shaping of cavity preparations for ceramic-inlay and partial-crown restorations. Supplied in a stainless steel bur block suitable for sterilization, the complete kit also provides six fine-grit diamonds for subsequent finishing, as well as a ball-shaped, normal-grit diamond for deepening the cavity beneath the fissure, if necessary.
