Features

• Reliable and durable, zirconia remains a challenging material to work with. To meet these new demands, Komet has developed the ZR range, offering five new shapes.

• High-quality diamond crystals ensure strong abrasion capability.

• Enhanced longevity thanks to a specific anchoring of the diamond particles.

• Calibrated diamond distribution ensures controlled, regular abrasion suitable for zirconia without compromising the prosthetic component.

• Coarse crystals (green–white band): high removal capacity and maximum durability.

• Medium crystals (blue–white band): optimum removal rate and good surface finish.

• Fine crystals (red–white band): ideal for smoothing surfaces and reducing the notching effect caused by grinding grooves.

• Komet 4ZR is a cylinder–round end, coarse grit diamond instrument used for cutting all-ceramic crowns, including zirconium dioxide and lithium disilicate.

Benefits

• Designed specifically for zirconia, offering controlled, efficient and safe abrasion.

• Improved longevity through robust diamond anchoring, reducing tool wear.

• Suitable for all-ceramic crown preparation, ensuring consistent and predictable results.

• Multiple grit options allow tailored surface adjustment, from high removal to precise smoothing.

• Provides a high-quality surface finish while minimising the risk of damaging prosthetic materials.

Recommendations for Use

• Optimal operating speed: 160,000 rpm.

• Always use a coolant spray when performing adjustments with ZR burs.

• For a perfect high-gloss finish in just two steps, use ZR polishers:

  1. Pre-polishing (blue),

  2. High-gloss polishing (grey).
     The complete protocol (ZR burs + ZR polishers) is available as a kit.

• When cutting materials prone to “jumping” (e.g., certain non-precious alloys), use the instrument in a turbine with low contact pressure.

• To fully benefit from the shape and size of the bur, apply the instrument at a 45-degree angle to the crown.

• Always apply sufficient coolant (at least 50 ml/min).

• Do not exceed a maximum contact pressure of 2 N.

The Komet ZR range is engineered to meet the growing demands of zirconia processing, offering exceptional abrasion efficiency, extended durability and precise control. With high-quality diamond crystals available in coarse, medium and fine grits, the ZR burs ensure safe, consistent removal and finishing across all-ceramic materials, including zirconium dioxide and lithium disilicate. Combined with Komet’s ZR polishing system, this range provides a complete, reliable solution for shaping, adjusting and finishing zirconia restorations with accuracy and long-term performance.

• Assigned Material: full ceramic
• Maximum Speed: 450000