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U.S. Frequently Asked Questions

What are the recommended standards for dental unit water quality?

The EPA standard for safe drinking water is ≤500 CFU/mL. This standard has been adopted by the CDC and accepted by the ADA and OSAP. DentaPure® cartridges are registered by the EPA to ensure that your practice meets ≤200 CFU/mL.

Should I perform an in-line treatment with a shock product before installing the DentaPure® cartridge?

“Shocking” is not required before the first use of the DentaPure® cartridge. However, if CFU counts are over 500 CFU/mL and you want to quickly reduce the count, or your current DUWL protocol has been inconsistent, it is suggested to treat waterlines using an approved in-line product prior to the installation of DentaPure cartridges for maximum biological reduction.

Which DentaPure® Cartridge is right for my unit?

Independent reservoir (bottle) units: DP40B (60 days, or 40L of water if usage records are kept) or DP365B (365 days, or 240L of water is usage records are kept). Quickly and easily self-installed.

Municipal or well (direct feed) units: DP365M (365 days, or 240L of water if usage records are kept). Crosstex recommends installation by a service technician from your preferred dealer.

Does the DentaPure® cartridge remove biofilm?

When used as directed, DentaPure® cartridges reduce microorganisms in the waterlines to a level that will meet or exceed the EPA standard of ≤ 500 CFU/mL for safe drinking water.
DentaPure cartridges do not claim to remove biofilm. However, DentaPure cartridges do prevent the growth of additional biofilm and are registered by the EPA to ensure that your practice meets ≤200 CFU/mL. If CFU counts are above 500 CFU/mL prior to DentaPure cartridge installation, Crosstex recommends using an approved in-line shock product. Once the DentaPure cartridge is installed, no monitoring or shocking protocol is required for 365 days, or 240L of water if usage records are kept.

How do I know if I need to treat my waterlines?

Even new waterlines begin to grow bacteria within a few days of use. According to research, any waterline that has not been maintained and routinely treated will have a high chance of being above the 500 CFU/mL limit set by the EPA for potable drinking water. See Barbeau J., Tanguay R., Faucher E., Avezard, C., Trudel L., Co^te L. and Pre’vost A.P. 1996. Multiparametric Analysis of Waterline Contamination in Dental Units. Amer Soc for Microbiology. 62,11:3954–3959

An outside lab that performs mail-in CFU testing can determine the level of colony forming units (CFU) in your waterlines.

Does the DentaPure® cartridge violate the proposed EPA rule for Best Management Practice for dental amalgam waste?

The DentaPure® cartridge is compliant with the proposed EPA rule for Best Management Practice for dental amalgam waste. The pH of the DentaPure cartridge falls between 6 and 8 – within the EPA BMP acceptable range. Please refer to the following study: Batchu H., Chou H, Rakowski D., Fan P.L. The effect of disinfectants and line cleaners on the release of mercury from amalgam.: JADA 2006Oct:1419-1425 and the proposed EPA rules for BMP: epa.gov/eg/dental-effluent-guidelines-documents

We just installed the DentaPure® cartridge. Why is our water discolored/Why does it have an odor?

Once installed, the DentaPure® cartridge will start treating the water to reduce the level of bacteria that is inside the line. The bacteria being flushed from the lines can have a noticeable color/odor if the unit has not been treated or inconsistently treated and has a large build-up of bacteria or biofilm in the lines. Flushing two liters of water through the dental unit waterlines can alleviate this; the color and odor should dissipate. Multiple two-liter flushes may be necessary.

Will my patients notice an iodine taste?

Most patients cannot detect the low level of iodine (2 – 6ppm).

What about my patients with iodine allergies?

DentaPure® cartridges use elemental iodine (I2). No allergy-causing proteins are attached to the iodine. People are not allergic to iodine, they are allergic to the protein sometimes attached to it. Please refer to this study: Schabelman E1, Witting M. The relationship of radiocontrast, iodine, and seafood allergies: a medical myth exposed, J Emerg Med. 2010 Nov;39(5):701-7. doi: 10.1016/j.jemermed.2009.10.014. Epub 2010 Jan 4.

How can I be certain the DentaPure® cartridge is working? Do I need to test it?

DentaPure® cartridges have been registered by the EPA to ensure that your practice will meet or exceed water quality have a maximum of 200 CFU/mL for 365 days, or 240L of water if usage records are kept. Costly and time intensive testing is not required to ensure that the DentaPure cartridge is working. However, it is recommended to check the iodine level at 11 months, or as you approach 240L of water to ensure that the iodine output has not fallen below 0.5ppm – particularly if you have a very busy practice.

Will the DentaPure® cartridge corrode or etch metal parts in my dental unit?

No. Studies show there is no corrosion or etching of metal parts in a dental unit. Data on file at Crosstex.

Will the DentaPure® cartridge interfere with the setting of my dentin bonding agents?

No. Studies show there is no effect on the setting of dentin bonding agents due to the use of the DentaPure® cartridge. dentapure.com/wp-content/themes/dentapure/library/pdf/Iodine-bonding-by-Ragu.pdf

What about water heaters and cup fillers on my dental unit?

In accordance with CDC guidelines, Crosstex strongly recommends the removal of in-line water heaters as they provide the perfect growth environment for bacteria.
www.osap.org/?page=Issues_DUWL_3

Cup fillers should be re-routed to a water source not being treated by the DentaPure® cartridge. This prevents premature depletion of the iodine in the cartridge.

Is there any independent testing information available on the DentaPure® cartridge?

Yes. The ADA, The Dental Advisor, and the United States Air Force have tested the DentaPure® cartridge.

Will DentaPure® cartridge treated effluent cause problems with Federal, local, or state water regulations?

The DentaPure® cartridge does not leave harmful substances in your wastewater and an intact cartridge will not expose your practice to regulatory limits and consequences that pertain to hazardous wastes. In the remote event that the cylinder or cartridge is broken and the iodine pellets are exposed, use extreme caution. Refer to the DentaPure cartridge IFU for instructions on handling a broken cartridge with exposed pellets.

Who installs DentaPure® cartridge on the units?

The DP40B and DP365B are easily self-installed within a few minutes. We recommend installation by a service technician from your preferred dealer for the municipal DP365M cartridge.

Do I still have to clean my bottle if I use the DentaPure® cartridge?

Yes, the DentaPure® cartridge only treats water that passes through the cartridge. It is important to empty and rinse the bottle nightly, and begin the morning with a fresh bottle of water. Please refer to the DentaPure cartridge IFU. Stagnant water can lead to bacterial growth.www.osap.org/?page=Issues_DUWL_1

Do I need to buy a special bottle to use the DentaPure® cartridge?

No. DentaPure® cartridges work with all existing bottles, including the two-liter quick disconnect style.

Where can I purchase DentaPure® cartridges?

DentaPure® cartridges are available through most distributors/dental supply dealers.

International Customers, please refer to the International FAQ’s available here.

All claims made based on use with potable water.

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