Surface Treatment

Clean abrasive for precision in dental technology - The importance of purity

From Renfert
May 15, 2025 | 5 minute(s) reading time

In dental technology, sandblasting plays a decisive role in surface treatment. However, not all abrasives provide the expected results. The abrasive material quality has a significant impact on precision, efficiency and safety in day-to-day laboratory work. Discover why clean abrasives are essential and what advantages a high-quality material can provide.

Why purity is crucial

Lack of purity, moisture absorption or irregular grit size - low-quality abrasives cause a number of problems Impure material can clog nozzle systems, lead to metal inclusions or create unwanted surface textures. This not only causes additional work, but also high costs. The solution? High-quality abrasives with controlled purity ensuring optimum results.

High-quality abrasives with a precise grain pattern

High-purity abrasives such as Cobra and Rolloblast feature a precise grit distribution and dry storage in sealable plastic canisters. 

This prevents the absorption of humidity thus ensuring that abrasives will not clump. Consistent sandblasting results and easy handling when filling the sandblasting tanks are therefore ensured.
 

The risks: Contamination and unsuitable grit size!

Low-quality abrasives lead to:

  • Contamination and uneven grit size
  • Clumping due to humidity
  • Poor surface control
  • Risk of metalliferous inclusions in the restoration
  • Risk of silicosis due to quartz impurities
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Instructions for optimal use

How to use abrasives effectively:

  1. Dry storage - Do not store your abrasive in spaces with high levels of humidity, such as the plaster working area.
  2. Controlled pressure - Work with 2-3 bar for optimal results.
  3. Select a suitable grit - Finer grits are best for precision sandblasting, coarser grits for framework preparation. 
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Advantages at a glance:

  • Time saving - Less reworking thanks to exact grit pattern
  • Precision - Optimum control over surface conditioning
  • Safety - No risk of silicosis thanks to controlled purity
  • Efficiency - No nozzle blockage thanks to uniform particle size

Abrasive application: It's the details that make the difference

  • Cobra 25 μm: For fine surface textures on intricate sandblasted objects
  • Cobra 50 μm: Gentle oxide removal and framework preparation (precious metal)
  • Cobra 90-125 μm: Surface conditioning (non precious alloys), oxide removal/devesting
  • Cobra 250 μm: Heavy oxide removal
  • Rolloblast 50 μm: Silk-matt glare-free surface, denture cleaning
  • Rolloblast 100 μm: Surface condensing

Key Takeaways

Rely on high-quality abrasives now and take dental technology to the next level!

➤ High-purity abrasives ensure precise results

➤ The appropriate grit size ensures optimal surface quality

➤ Safety and efficiency guaranteed by quality standards according to DIN 8201

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