3.2 Liter 100Watt Dental Ultrasonic Washer With Heater And Power Adjustable

How Dental Ultrasonic Washer Work in Dental Clinics?

The hazards of manually scrubbing sharp or pointed dental instruments has been presented. Mechanical washers, also cited, are effective but not able to provide the thorough cleaning action delivered by ultrasonic energy - called ultrasonic cavitation - in the cleaning bath. But as effective as the technology is, it's important to keep in mind that ultrasonic cleaning dental instruments is a pre-step to either disinfecting or sterilizing, whichever process is employed by the clinic.

Dental instrument ultrasonic cleaners consist of a tank to hold the cleaning solution (more on this later). To the tank are bonded ultrasonic transducers powered by a generator and excited to ultrasonic frequencies such as 37,000 cycles per second (37 kHz).

These frequencies cause the tank bottom to vibrate as a membrane, thus creating millions of microscopic vacuum bubbles that implode on contact with items being cleaned. The implosions blast loose and carry away contaminants. Because the bubbles are so small they reach into cracks, crevices and other areas difficult or impossible to clean using manual cleaning or mechanical washers. And despite the violence of implosion, the action is so fast that it does not damage parts being cleaned.

Ultrasonic dental instrument cleaners are also equipped with control panels providing an on-off switch, thermostats and timers that allow technicians to program cleaning cycles. Other useful features include a "Sweep" mode that slightly and automatically varies the ultrasonic frequency to avoid what are called "hot spots" of intense cavitation, "dead zones" of little or no cavitation and harmonic distortion. The Sweep mode assures an overall uniform cleaning action.

And to review an important point one more time: any contaminants remaining on dental instruments before they are disinfected or sterilized will remain a source of contamination.

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A Typical Ultrasonic Cleaning Cycle for Dental Instruments

We say "typical" because procedures may vary from practice to practice, and in any case should be spelled out in the dental clinic's standard operating procedure manual.

At the very beginning it is important that dental instruments be flushed and rinsed immediately after use to remove any gross contaminants. If allowed to remain dry and harden on surfaces they become much more difficult to remove. This step also helps prolong the life of the ultrasonic bath because fewer or no loose particles are introduced during the cleaning cycle. Dental clinics that hold instruments for batch sonic cleaning at the end of the day should immerse these tools in a germicidal presoak after rinsing.

As another point, instruments with hinges such as extraction tools should be disassembled if feasible to allow better access for the cleaning solution and cavitation.

Additionally,

• for best results instruments of like composition should be cleaned together. Avoid mixing stainless steel, aluminum, copper and brass in the same cycle.

• chromium-plated dental tools should not be cleaned ultrasonically

• do not "stack" instruments in the basket. This not only lowers cleaning efficiency but can also result in them vibrating against each other.

• If hinged instruments cannot be disassembled, clean them in the open position.