Many things affect the shelf-life of teeth whitening gels, such as the active ingredient, concentration/strength of the active ingredient, the formulation itself, the container the gel is in, and temperature. Different types of gel have different shelf lives.
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If the expiration date is set one year from the production date, it has a shelf-life of one year. If the expiration date is set two years from the date of production, it has a 2-year shelf-life.
At Beaming White, we actually test gel stability/shelf-life for every batch of gel immediately after the gel is manufactured. We do this by placing the gel in an incubator that is set at 45°C (113°F) 24 hours a day, and seeing for how many days, weeks or months it maintains its integrity. If the gel doesn&#;t last as long as it should, the entire batch is discarded (although this hasn&#;t happened in many years). We also keep retained samples in refrigeration and at room temperature for 2 years, at which point we check the gel to make sure it&#;s still in gel form and that the concentration is still high enough.
Here&#;s what to look for before buying and a couple of things that affect how long a gel lasts before it expires&#;
KöR Desensitizer helps desensitize and prevent sensitivity issues immediately, before they arise.
Our desensitizing method includes desensitizers that plug the orifices of dentinal tubules during whitening to &#;prevent&#; sensitivity, rather than simply attempting to treat the symptoms. The &#;Hydrodynamic Mechanism&#; theory of tooth sensitivity states that movement of the fluid within dentinal tubules is responsible for mechanically activating the nerves at the periphery of the pulp, causing a painful reaction. When the natural smear plugs are lost from the orifices of dentinal tubules, fluid within the tubules can move thirty-two times more freely, causing dentinal hypersensitivity.
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The oxygenation process during whitening not only deeply cleanses the tooth, but also actively displaces the plugs in dentinal tubules, leaving the tubular fluid susceptible to flow. The whitening chemicals create an osmotic gradient in fluid flow within the dentinal tubules outward from the pulp. The result is typical whitening sensitivity, which can sometimes be very acute.
Potassium nitrate, often recommended for treatment of sensitivity, does not plug tubules. In some patients it partially reduces the ability of the pulpal nerves to fire. This affect does not eliminate the pulpal inflammation, and only partially masks the symptoms. Some claim ACP will block dentinal tubules, however ACP has been primarily developed and studied in relation to repairing highly inorganic enamel, not the more organic dentin. Even if ACP were to cause mineral formation within dentin, which is much more organic in nature than enamel, it would do so by slowly &#;growing&#; tooth structure instead of actively and rapidly &#;plugging&#; tubules.
KöR desensitizers instantly plug and re-plug the orifices of the dentinal tubules to &#;prevent&#; pulpal inflammation and sensitivity rather than simply treat the symptoms. The first desensitizer, applied at chairside, plugs tubules. The second desensitizer, applied by the patient daily at home, also instantly plugs tubules..
Open dentinal tubules closed by KöR desensitizers:
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