Diamond micron powders
Synthetic micron powders to GOST 9206-80 / ISO 13320, fractions W40–W0.1, grades AAA/AA/A/B/C. Fraction selection by material and target roughness. Learn more
CP2 · Dental laboratory
Zirconia restorations
Zirconia restorations
grinding after sintering
Accurate fit, chipping-free margins, surface ready for glazing
After sintering, a zirconia restoration is a dense, high-hardness ceramic. Form and fit are corrected on the already-sintered material, and the point is to cut rather than chip it: the margin must stay intact and the surface must be ready for glaze or stain.
Problem and solution
What blocks progress
- Sintered zirconia hardness: conventional abrasives cut slowly and load up.
- Margin chipping during removal — the unit has to be remade and chair time is lost.
- The unit no longer seats on the model after sintering, and adjusting fired ceramic is risky.
- Before glazing the surface must be uniform: coarse-abrasive scratches show through firing.
What we do
- Three supply stages — shaping, finishing, polishing: each with its own fraction instead of one “universal” grade.
- Oil- and water-based pastes: for hand finishing at the bench and for machine polishing.
- Fine fractions for finishing (W3.5 and below) — an even matte tone without streaks before glazing.
- Laboratory-friendly packaging: small volumes and repeatable behaviour batch to batch.
Indicative fraction ranges
Starting points for selection on sintered zirconia. The actual fraction depends on restoration type, wall thickness, laboratory equipment and fit requirements.
| Operation | Fraction | Purpose |
|---|---|---|
| Shaping and seating | W20 – W14 | material removal, contact correction |
| Surface finishing | W10 – W3.5 | levelling, preparation for glazing |
| Polishing | W1 – W0.5 | gloss without glaze, margin finishing |
Why diamond, not aluminium oxide or silicon carbide
The rule is the same as in metalworking: the abrasive must be harder than the material. Sintered zirconia is hard, so conventional abrasives mostly wear themselves down against it — hence heat, loading and the risk of margin chipping. Diamond cuts predictably, which is why it is the primary abrasive for zirconia finishing.
Work is done with cooling or at moderate speed to avoid local overheating; specific parameters come from the laboratory equipment and are confirmed on a sample.
How to start
- Describe: restoration type, material (zirconia, printed or milled), the operation and the required result.
- Get a fraction set for your three stages plus carrier recommendations.
- Validate on your own units — start with a trial batch from 1 kg.
We supply materials to dental laboratories as processing consumables. We do not manufacture or sell medical devices and do not provide clinical advice.
Recommended products
Diamond pastes and concentrates
Ready oil- and water-based pastes, plus concentrates diluted to your specific process. The carrier is selected by workpiece material and cleaning requirements. Learn more
Suspensions
Stable water- and oil-based suspensions for machine lapping and polishing, including complex geometries. Learn more
Describe your task — we will suggest a fraction
Send us the part material, printing method, target roughness and volume — we will reply with a fraction and carrier recommendation. You can start with a trial batch from 1 kg.