Scale Inhibition Performance of GREEN&CLEAN WK

Introduction
This scientific-technical report summarizes the laboratory evaluation of the scale inhibition performance of GREEN&CLEAN WK at its standard application concentration (235 ppm).

Dental treatment units rely on clean, deposits-free waterlines to maintain hygiene, system longevity and reliable flow conditions. Scale formation—primarily due to precipitation of calcium and magnesium carbonates—is one of the most common causes of technical failures and hygiene impairment. The purpose of this study was to quantify the ability of GREEN&CLEAN WK to prevent such mineral precipitation under realistic operating conditions.

Methods
Water samples were prepared at hardness levels of 4°, 12°, and 20° dH, representing soft, medium, and hard water. Two laboratory conditions were used to simulate dental unit environments:

• Static test: samples incubated for 24 h at 60°C
• Dynamic test: samples stirred for 6 h at 60°C (simulated circulation)

Total hardness before and after the test was determined, allowing precise quantification of dissolved vs. precipitated calcium (Ca2+) and magnesium (Mg2+) ions. Untreated controls were compared directly to samples containing GREEN&CLEAN WK at 235 ppm.

Results
Across water hardness levels up to 12° dH, GREEN&CLEAN WK achieved near-complete inhibition of scale formation, with >99% of Ca2+ and Mg2+ ions remaining dissolved. No significant mineral precipitation was detected under either static or dynamic conditions.
At 20° dH, where carbonate saturation limits are inherently exceeded, precipitation could not be fully prevented; however, the presence of GREEN&CLEAN WK reduced scale formation markedly compared to untreated controls. This confirms the strong chelating and scale-stabilizing properties of the formulation.

Conclusion
GREEN&CLEAN WK provides robust and reliable scale inhibition in soft to moderately hard water and significantly reduces precipitation even at elevated hardness levels. This dual functionality—waterline disinfection combined with mineral stabilization—ensures:

• Improved hygiene and biofilm prevention
• Reduced technical wear and maintenance
• Longer system lifetime and stable water flow
• Enhanced operational safety in dental treatment units

GREEN&CLEAN WK is therefore a scientifically validated and highly effective solution for maintaining clean, scale-free dental water systems.