PracticeSafe Soak, the popular impression material disinfectant

Some existing users highlight the benefits of Kemdent's PracticeSafe Soak impression material disinfectant

Since the introduction of The Department of Health’s Decontamination Health Technical Memorandum 01-05: Decontamination in primary care dental practices both Dental Practices and Laboratories have had to review their protocols regarding infection control involving the transfer of impressions, models and removable appliances (including crowns, bridges and dentures etc). This is because, on page 42, it states that all impressions, prostheses and orthodontic appliances must be "decontaminated in a multi-step process to be conducted in accord with the device or material manufacturer’s instructions".PracticeSafe Impression Soak Pouring

Supplied in a concentrated form, PracticeSafe Soak has been specifically designed to meet all the requirements of HTM 01-05 and all the other relevant regulations and standards regarding the disinfection of impression materials, prostheses and orthodontic appliances within the Laboratory environment.

In its recommended 3% working concentration, after removing any debris under running water, only 3 minutes immersion is required. This is dramatically less than the 10 minutes recommended by the manufacturers of many of the other products currently available on the market. This means that the risk of alginate and polyether impressions becoming distorted due to water absorption is minimised. It also saves time for Technicians, who are often in a hurry and do not want to waste time waiting around while an impression soaks for the right duration, often resulting in inadequate disinfection.

The active ingredients in PracticeSafe Soak are Alkyldimethylbenzyl Ammonium Chloride and Didecyldimethyl Ammonium Chloride, without any of the degreasers or alcohols present in other materials. The combination of all three means that PracticeSafe Soak is effective against bacteria (including MRSA) and fungi (including yeasts) and lipid enveloped viruses.

PracticeSafe Soak is supplied in a concentrated liquid presentation which is easily diluted in water to produce a 3% working solution, which should be changed daily or when it has become visibly contaminated. 30ml of PracticeSafe Soak making 1 litre of solution in which to soak the impressions (alginate, polyether, addition silicone etc), acrylic dentures and even waxes during the try-in stage. For details of the dilution rates for different volumes of PracticeSafe Soak please see Table 1 below.

PracticeSafe Soak Table 1





Following the instructions for use is extremely important

In order to obtain optimum results from this product it is essential to follow the manufacturer’s instructions correctly.

The first step is to produce a proper 3% solution using the refillable dosage bottle. To achieve this easily and accurately the cap of the dosage bottle is opened by half a turn. The body of the bottle is then squeezed until the required 30ml of concentrated PracticeSafe Soak fills the dosage chamber. This 30ml of Practice Safe Soak is then poured out into an impression bath containing 970ml of water to create 1 litre of 3% PracticeSafe Soak. Always add the concentrate to the water and ensure it is mixed well. Avoid excess foaming.

If 2 litres of 3% PracticeSafe Soak is required add 60ml of concentrate to 1 litre 940ml of water to make 2 litres of working solution. For 4 litres add 120ml of concentrate to 3 litres 880ml of water and so on. Therefore, one litre of PracticeSafe Soak concentrate will make 33 litres of 3% PracticeSafe Soak solution.

Should the dosage chamber of the dosage bottle ever become overfilled it can be emptied again by closing the cap of the dosage chamber, loosening the filling cap, squeezing the body of the bottle to create a vacuum which sucks out the concentrate from the dosage chamber, closing the filling cap and tilting the bottle slightly. Once the dosage chamber has emptied the dosage cap can be reopened and squeezing the body of the dosage bottle will dispense the correct amount (30ml) into the dosage chamber ready for dispensing.

The second step is to rinse the impressions with clean running water thoroughly to remove any visible contamination such as blood and saliva. Completely immerse the impression and tray in the 3% PracticeSafe Soak solution in the impression bath for 3 minutes. After the full 3 minutes remove the impression and tray and rinse thoroughly under clean running water to remove the PracticeSafe Soak.

The manufacturers recommend that the PracticeSafe Soak solution is changed daily or when the solution is visibly contaminated. Some Technicians prefer to make up a larger quantity of 3% PracticeSafe Soak in advance and simply dispense it as and when required. This is a perfectly satisfactory thing to do.


Existing users

This is what some Technicians who have already swapped to PracticeSafe Soak had to say:-


Quote from Leon Corns CDT, Leon Corns Denture Services, Dudley:

"We switched from Impressiv universal dental impression disinfectant spray about three years ago because it was a spray and we wanted to use a soak. We also liked the fact that PracticeSafe Soak was more economical, had a nice blue colour and multiple uses. We use it to disinfect impressions in a bath for three minutes. We also have two small soak pots for denture repairs which we use to disinfect prostheses in before handling them.

On removal from the mouth impressions are inspected, then washed under running water for about 30 seconds. Then they are placed in the impression disinfection bath with the lid placed on for about 3 minutes. Once out of the impression bath they are rinsed again under running water and wrapped in a wet paper towel. These are then placed in a sealed polythene bag. The work ticket laboratory prescription is stamped as proof of being disinfected. Only then do they go through to the laboratory area.

For denture repairs, when the patient arrives we ask them to come into the clinical area and remove their dentures and place them in a small soak pot. We tell them that we need to make sure we disinfect the denture before we handle it. While in the pot we take the patient’s details and don a pair of gloves. This process takes about one minute. We then wash the denture under running water and dry it with tissue and examine the denture. This solution is changed every day or sometimes after a particularly dirty denture which has clouded the solution.

Our impression disinfection bath holds about 5 litres so the solution is changed every day, but I can see why Labs with smaller baths would use smaller quantities provided the impressions are fully immersed. The solution normally stays clear and usable all day because we wash all the impressions under running water before immersing them in the solution.

We find the dosage compartment with the ml markings on the two cap container very useful for quick preparation of solutions.

Another advantage of PracticeSafe Soak is that it costs a lot less than ready to use solutions because it is in a concentrated form. We also like the fragrance because it smells reassuringly strong. We also like its blue colour because it is a clinical colour and if it was clear we would be concerned about its concentration values."


Quote from Alex Kerr, Chilli Dental Lab, Whitley Bay, Tyne & Wear:

"I started using PracticeSafe Soak in 2014. Before that I used to use Perform ID, but I didn’t like the fact that the granules didn’t always dissolve straight away so I wasn’t sure that the solution was of the correct concentration. I like PracticeSafe Soak because it is easy to use and reliable. I use it to disinfect all my impressions and dentures requiring remedial work. I always prepare small quantities and replace it twice daily because prevention of cross contamination is of paramount importance. I don’t use an ultrasonic bath. PracticeSafe Soak costs a lot less than Perform ID too."


Quote from John Craig, Canton Dental Laboratory, Cardiff:

"We’ve been using PracticeSafe Soak for about a year now, before that we used a spray-type disinfectant but didn’t think it was as effective as a soak like PracticeSafe. We use it for all the impressions and denture repairs that come into the Lab. We change the solution every day and, after unwrapping the impression, place them in the soak for 10 minutes ready for casting up. We make up the solution when we need it and do not use an ultrasonic bath as we believe soaking them is sufficient. PracticeSafe costs about the same as the spray product we used to use. PracticeSafe has little or no fragrance and its colour is a useful aid to mixing. We find the dispensing bottle easy to use and it works well. We feel it is an effective and safe product to use."


Quote from Richard Hinley, John Foster Private Prosthetics, Swalwell:

"We started using PracticeSafe Soak about 18 months ago because we needed a more specific disinfection material for use with impressions than the normal antibacterial solution we used to use. We find it easy to use and it produces good results."



When using PracticeSafe Soak, as recommended by the manufacturer, it delivers a reliable, effective and extremely economical means of disinfecting impressions and dentures requiring repair. Kemdent recommend impressions are rinsed with clean running water to remove any visible contamination such as blood and saliva, then completely immerse the impression and tray in a 3% PracticeSafe Soak solution in the impression bath for 3 minutes. After the full 3 minutes remove the impression and tray and rinse thoroughly under clean running water to remove the PracticeSafe Soak.


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