Bizopen Diamond Bur Round End Cylinder 881-016 Standard Grit

The Bizopen Diamond Bur Round End Cylinder 881-016 Standard Grit is a modified cylindrical instrument with a dome-shaped rounded end designed for chamfer and deep chamfer margin preparation in crown procedures where the practitioner prefers a rounded internal margin angle over the sharp right angle produced by flat-end cylinder burs. The round end cylinder combines the parallel lateral wall geometry of a cylinder bur for axial wall preparation with a rounded end that automatically produces a rounded chamfer margin profile when swept along the finish line — eliminating the need for a separate chamfer finishing step with a torpedo or flame instrument. Bizopen’s 180 grit standard diamond coating covers both the cylindrical lateral surface and the rounded dome end, providing uniform cutting across all working surfaces simultaneously. The 1.6 mm body diameter provides the lateral extent needed for posterior crown axial wall preparation while remaining accessible in anterior preparation zones that wider burs cannot reach without excessive soft tissue displacement. The round end geometry eliminates the stress-concentrating sharp internal corner at the axio-gingival preparation angle, reducing the risk of microcrack initiation in the enamel preparation finish line under occlusal loading of the completed restoration. The round end cylinder is preferred by practitioners who work with all-ceramic restorations requiring a conservative chamfer or deep chamfer margin design. FG shank. ISO 806 314 137 524 016. Working diameter: 1.6 mm. Working length: 5.0 mm.